7082 lines
161 KiB
Plaintext
7082 lines
161 KiB
Plaintext
*************** Case 1 ***************
|
|
drop database if exists explain_db;
|
|
{
|
|
"drop_database_arg":"tenant_id",
|
|
"database_name":"explain_db",
|
|
"if_exist":true
|
|
}
|
|
*************** Case 2 ***************
|
|
create database explain_db;
|
|
{
|
|
"create_database_arg":"database_schema",
|
|
"database_id":-1,
|
|
"schema_version":1,
|
|
"database_name":"explain_db",
|
|
"replica_num":0,
|
|
"zone_list": [
|
|
],
|
|
"primary_zone":"",
|
|
"charset_type":2,
|
|
"collation_type":"utf8mb4_general_ci",
|
|
"name_case_mode":-1,
|
|
"comment":""
|
|
}
|
|
*************** Case 3 ***************
|
|
use explain_db;
|
|
{
|
|
"stmt_type":81,
|
|
"table_items": [
|
|
],
|
|
"column_items": [
|
|
]
|
|
}
|
|
*************** Case 4 ***************
|
|
create table t1(c1 int primary key, c2 int);
|
|
{
|
|
"stmt_type":17,
|
|
"create_table_arg": {
|
|
"if_not_exist":false,
|
|
"schema": {
|
|
"tenant_id":1,
|
|
"database_id":1099511628779,
|
|
"tablegroup_id":1099511627777,
|
|
"table_id":-1,
|
|
"table_name":"t1",
|
|
"max_used_column_id":17,
|
|
"rowkey_column_num":1,
|
|
"index_column_num":0,
|
|
"rowkey_split_pos":0,
|
|
"block_size":16384,
|
|
"is_use_bloomfilter":false,
|
|
"step_merge_num":1,
|
|
"replica_num":0,
|
|
"load_type":0,
|
|
"table_type":0,
|
|
"index_type":0,
|
|
"def_type":1,
|
|
"charset_type":2,
|
|
"collation_type":45,
|
|
"data_table_id":0,
|
|
"create_mem_version":0,
|
|
"index_status":1,
|
|
"name_casemode":-1,
|
|
"code_version":1,
|
|
"schema_version":0,
|
|
"last_modified_frozen_version":0,
|
|
"part_level":1,
|
|
"part_expr": {
|
|
"part_func_type":0,
|
|
"part_func_expr":"",
|
|
"part_num":1
|
|
},
|
|
"comment":"",
|
|
"tablegroup_name":"",
|
|
"compress_func_name":"none",
|
|
"primary_zone":"",
|
|
"expire_info":"",
|
|
"view_schema": {
|
|
"view_definition":"",
|
|
"check_option":"none",
|
|
"is_updatable":"false",
|
|
"alias_name":""
|
|
},
|
|
"autoinc_column_id":0,
|
|
"auto_increment":0,
|
|
"index_tid_array": [
|
|
],
|
|
"column_array": [
|
|
{
|
|
"tenant_id":-1,
|
|
"table_id":-1,
|
|
"column_id":16,
|
|
"schema_version":0,
|
|
"rowkey_position":1,
|
|
"index_position":0,
|
|
"order_in_rowkey":0,
|
|
"meta_type": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"is_nullable":false,
|
|
"is_zero_fill":false,
|
|
"is_autoincrement":false,
|
|
"is_hidden":false,
|
|
"charset_type":2,
|
|
"on_update_current_timestamp":false,
|
|
"orig_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"cur_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"column_name":"c1",
|
|
"comment":""
|
|
},
|
|
{
|
|
"tenant_id":-1,
|
|
"table_id":-1,
|
|
"column_id":17,
|
|
"schema_version":0,
|
|
"rowkey_position":0,
|
|
"index_position":0,
|
|
"order_in_rowkey":0,
|
|
"meta_type": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"is_nullable":true,
|
|
"is_zero_fill":false,
|
|
"is_autoincrement":false,
|
|
"is_hidden":false,
|
|
"charset_type":2,
|
|
"on_update_current_timestamp":false,
|
|
"orig_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"cur_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"column_name":"c2",
|
|
"comment":""
|
|
}
|
|
]
|
|
},
|
|
"index_arg_list": [
|
|
]
|
|
},
|
|
"db_name":"explain_db"
|
|
}
|
|
*************** Case 5 ***************
|
|
create table t2(c1 int primary key, c2 int, c3 varchar(32));
|
|
{
|
|
"stmt_type":17,
|
|
"create_table_arg": {
|
|
"if_not_exist":false,
|
|
"schema": {
|
|
"tenant_id":1,
|
|
"database_id":1099511628779,
|
|
"tablegroup_id":1099511627777,
|
|
"table_id":-1,
|
|
"table_name":"t2",
|
|
"max_used_column_id":18,
|
|
"rowkey_column_num":1,
|
|
"index_column_num":0,
|
|
"rowkey_split_pos":0,
|
|
"block_size":16384,
|
|
"is_use_bloomfilter":false,
|
|
"step_merge_num":1,
|
|
"replica_num":0,
|
|
"load_type":0,
|
|
"table_type":0,
|
|
"index_type":0,
|
|
"def_type":1,
|
|
"charset_type":2,
|
|
"collation_type":45,
|
|
"data_table_id":0,
|
|
"create_mem_version":0,
|
|
"index_status":1,
|
|
"name_casemode":-1,
|
|
"code_version":1,
|
|
"schema_version":0,
|
|
"last_modified_frozen_version":0,
|
|
"part_level":1,
|
|
"part_expr": {
|
|
"part_func_type":0,
|
|
"part_func_expr":"",
|
|
"part_num":1
|
|
},
|
|
"comment":"",
|
|
"tablegroup_name":"",
|
|
"compress_func_name":"none",
|
|
"primary_zone":"",
|
|
"expire_info":"",
|
|
"view_schema": {
|
|
"view_definition":"",
|
|
"check_option":"none",
|
|
"is_updatable":"false",
|
|
"alias_name":""
|
|
},
|
|
"autoinc_column_id":0,
|
|
"auto_increment":0,
|
|
"index_tid_array": [
|
|
],
|
|
"column_array": [
|
|
{
|
|
"tenant_id":-1,
|
|
"table_id":-1,
|
|
"column_id":16,
|
|
"schema_version":0,
|
|
"rowkey_position":1,
|
|
"index_position":0,
|
|
"order_in_rowkey":0,
|
|
"meta_type": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"is_nullable":false,
|
|
"is_zero_fill":false,
|
|
"is_autoincrement":false,
|
|
"is_hidden":false,
|
|
"charset_type":2,
|
|
"on_update_current_timestamp":false,
|
|
"orig_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"cur_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"column_name":"c1",
|
|
"comment":""
|
|
},
|
|
{
|
|
"tenant_id":-1,
|
|
"table_id":-1,
|
|
"column_id":17,
|
|
"schema_version":0,
|
|
"rowkey_position":0,
|
|
"index_position":0,
|
|
"order_in_rowkey":0,
|
|
"meta_type": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"is_nullable":true,
|
|
"is_zero_fill":false,
|
|
"is_autoincrement":false,
|
|
"is_hidden":false,
|
|
"charset_type":2,
|
|
"on_update_current_timestamp":false,
|
|
"orig_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"cur_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"column_name":"c2",
|
|
"comment":""
|
|
},
|
|
{
|
|
"tenant_id":-1,
|
|
"table_id":-1,
|
|
"column_id":18,
|
|
"schema_version":0,
|
|
"rowkey_position":0,
|
|
"index_position":0,
|
|
"order_in_rowkey":0,
|
|
"meta_type": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IGNORABLE"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"is_nullable":true,
|
|
"is_zero_fill":false,
|
|
"is_autoincrement":false,
|
|
"is_hidden":false,
|
|
"charset_type":2,
|
|
"on_update_current_timestamp":false,
|
|
"orig_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"cur_default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"column_name":"c3",
|
|
"comment":""
|
|
}
|
|
]
|
|
},
|
|
"index_arg_list": [
|
|
]
|
|
},
|
|
"db_name":"explain_db"
|
|
}
|
|
*************** Case 6 ***************
|
|
explain select 1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"1",
|
|
"expr_name":"1",
|
|
"obj_type":"BIGINT",
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 7 ***************
|
|
explain select 1+1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_QUESTIONMARK",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_PARAM",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_PARAM",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"UNKNOWN":0
|
|
}
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"1+1",
|
|
"expr_name":"1+1",
|
|
"obj_type":"BIGINT",
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":1,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
},
|
|
"idx":0
|
|
}
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 8 ***************
|
|
explain insert into t1 (c1,c2) values(1,1);
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":2,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"value": [
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":0
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 9 ***************
|
|
explain insert into t2 (c1,c2,c3) values(1,1,'a');
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":2,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630878,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":18,
|
|
"column_name":"c3",
|
|
"table_id":1099511630878,
|
|
"obj_type":"VARCHAR",
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"utf8mb4_general_ci",
|
|
"cs_level":2,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IMPLICIT"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
2
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":18,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"value": [
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":0
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":22
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":32
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_VARCHAR",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"COERCIBLE"
|
|
},
|
|
"accuracy": {
|
|
"length":1,
|
|
"precision":1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"VARCHAR":"a",
|
|
"collation":"utf8mb4_general_ci"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 10 ***************
|
|
explain replace into t1 (c1,c2) values(2,2);
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":3,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"value": [
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":0
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 11 ***************
|
|
explain replace into t2 (c1,c2,c3) values(2,2,'b');
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":3,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630878,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":18,
|
|
"column_name":"c3",
|
|
"table_id":1099511630878,
|
|
"obj_type":"VARCHAR",
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"utf8mb4_general_ci",
|
|
"cs_level":2,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IMPLICIT"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
2
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":18,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"value": [
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":0
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":22
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":32
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_VARCHAR",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"COERCIBLE"
|
|
},
|
|
"accuracy": {
|
|
"length":1,
|
|
"precision":1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"VARCHAR":"b",
|
|
"collation":"utf8mb4_general_ci"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 12 ***************
|
|
explain select c1,c2 from t1 where c1 = 2 and c2 =1 limit 1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1",
|
|
"expr_name":"c1",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":false
|
|
},
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65518,
|
|
"is_alias":false,
|
|
"alias_name":"c2",
|
|
"expr_name":"c2",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
{
|
|
"item_type":"T_OP_EQ",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN",
|
|
"IS_SIMPLE_COND"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_OP_EQ",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN",
|
|
"IS_SIMPLE_COND"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit": {
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
},
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
[
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":2
|
|
}
|
|
}
|
|
],
|
|
[
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 13 ***************
|
|
explain select c1 + c2 from t1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1 + c2",
|
|
"expr_name":"c1 + c2",
|
|
"obj_type":"BIGINT",
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 14 ***************
|
|
explain select distinct * from t1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1",
|
|
"expr_name":"c1",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
},
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65518,
|
|
"is_alias":false,
|
|
"alias_name":"c2",
|
|
"expr_name":"c2",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":true,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 15 ***************
|
|
explain select c1, sum(c2) from t1 where c1 > 0 and c2 + c1 = 100 group by c2 order by c1 desc limit 0, 1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1",
|
|
"expr_name":"c1",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":false
|
|
},
|
|
{
|
|
"expression": {
|
|
"item_type":"T_FUN_SUM",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_AGG",
|
|
"CNT_COLUMN",
|
|
"CNT_AGG"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"order_by": [
|
|
],
|
|
"separator_param_idx":-1
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65508,
|
|
"is_alias":false,
|
|
"alias_name":"sum(c2)",
|
|
"expr_name":"sum(c2)",
|
|
"obj_type":"BIGINT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
{
|
|
"item_type":"T_OP_GT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN",
|
|
"IS_RANGE_COND"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":0
|
|
}
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_OP_EQ",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"group_by": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
{
|
|
"column_id":65518,
|
|
"expression": {
|
|
"item_type":"T_FUN_SUM",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_AGG",
|
|
"CNT_COLUMN",
|
|
"CNT_AGG"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"order_by": [
|
|
],
|
|
"separator_param_idx":-1
|
|
}
|
|
}
|
|
],
|
|
"order_by": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
"ascending":"DESC"
|
|
}
|
|
],
|
|
"limit": {
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
},
|
|
"offset": {
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":0
|
|
}
|
|
},
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
[
|
|
{
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":100
|
|
}
|
|
}
|
|
]
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 16 ***************
|
|
explain select c1 as tc1 from t1 union select c2 from t2;
|
|
{
|
|
"explain_stmt": {
|
|
"set_op":1,
|
|
"distinct":true,
|
|
"left_query": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_FUN_SYS_ALIAS_REF",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_FUNC",
|
|
"CNT_COLUMN",
|
|
"CNT_FUNC"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
0
|
|
],
|
|
"func":"tc1",
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":true,
|
|
"alias_name":"tc1",
|
|
"expr_name":"c1",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":false
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
},
|
|
"right_query": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630878,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65518,
|
|
"is_alias":false,
|
|
"alias_name":"c2",
|
|
"expr_name":"c2",
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
},
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_FUN_SYS_ALIAS_REF",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_FUNC",
|
|
"CNT_COLUMN",
|
|
"CNT_FUNC"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
0
|
|
],
|
|
"func":"tc1",
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"tc1",
|
|
"expr_name":"c1",
|
|
"obj_type":"INT",
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":false
|
|
}
|
|
]
|
|
}
|
|
}
|
|
*************** Case 17 ***************
|
|
explain update t1 set c1 = 3 where c2 =1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":5,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"input_columns": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"assign": [
|
|
{
|
|
"table": {
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
},
|
|
"assign": [
|
|
{
|
|
"column": {
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
"expression": {
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":4
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":11
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":0
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":3
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"where": [
|
|
{
|
|
"item_type":"T_OP_EQ",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN",
|
|
"IS_SIMPLE_COND"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"when": [
|
|
],
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 18 ***************
|
|
explain update t2 set c3 = 'B' where c1 =1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":5,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630878,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":18,
|
|
"column_name":"c3",
|
|
"table_id":1099511630878,
|
|
"obj_type":"VARCHAR",
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"utf8mb4_general_ci",
|
|
"cs_level":2,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IMPLICIT"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":18,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"input_columns": [
|
|
{
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630878,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":18,
|
|
"column_name":"c3",
|
|
"table_id":1099511630878,
|
|
"obj_type":"VARCHAR",
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"utf8mb4_general_ci",
|
|
"cs_level":2,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IMPLICIT"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":18,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"assign": [
|
|
{
|
|
"table": {
|
|
"table_id":1099511630878,
|
|
"table_name":"t2",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630878,
|
|
"database_name":"explain_db"
|
|
},
|
|
"assign": [
|
|
{
|
|
"column": {
|
|
"column_id":18,
|
|
"column_name":"c3",
|
|
"table_id":1099511630878,
|
|
"obj_type":"VARCHAR",
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"utf8mb4_general_ci",
|
|
"cs_level":2,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"IMPLICIT"
|
|
},
|
|
"accuracy": {
|
|
"length":32,
|
|
"precision":32,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":18,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
"expression": {
|
|
"item_type":"T_FUN_COLUMN_CONV",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"IS_FUNC",
|
|
"IS_CALCULABLE_EXPR",
|
|
"IS_CONST_EXPR",
|
|
"CNT_CONST",
|
|
"CNT_FUNC",
|
|
"CNT_CALCULABLE_EXPR"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"func":"column_conv",
|
|
"children": [
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":22
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"INT":32
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_BOOL",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"TINYINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"TINYINT":1
|
|
}
|
|
},
|
|
{
|
|
"item_type":"T_VARCHAR",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"VARCHAR",
|
|
"collation":"utf8mb4_general_ci",
|
|
"coercibility":"COERCIBLE"
|
|
},
|
|
"accuracy": {
|
|
"length":1,
|
|
"precision":1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"VARCHAR":"B",
|
|
"collation":"utf8mb4_general_ci"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"where": [
|
|
{
|
|
"item_type":"T_OP_EQ",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":-1,
|
|
"precision":-1,
|
|
"scale":-1
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"CNT_CONST",
|
|
"CNT_COLUMN",
|
|
"IS_SIMPLE_COND"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630878,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_INT",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_CONST",
|
|
"CNT_CONST"
|
|
],
|
|
"rel_id": [
|
|
],
|
|
"base_column_id": [
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"value": {
|
|
"BIGINT":1
|
|
}
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"when": [
|
|
],
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
}
|
|
}
|
|
}
|
|
*************** Case 19 ***************
|
|
explain extended select c1 + c2 from t1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1 + c2",
|
|
"expr_name":"c1 + c2",
|
|
"obj_type":"BIGINT",
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|
|
*************** Case 20 ***************
|
|
explain partitions select c1 + c2 from t1;
|
|
{
|
|
"explain_stmt": {
|
|
"stmt_type":1,
|
|
"table": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"table_name":"t1",
|
|
"alias_name":"",
|
|
"table_type":0,
|
|
"ref_id":1099511630877,
|
|
"database_name":"explain_db"
|
|
}
|
|
],
|
|
"joined_table": [
|
|
],
|
|
"partition_express": [
|
|
],
|
|
"column": [
|
|
{
|
|
"column_id":16,
|
|
"column_name":"c1",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":false,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
}
|
|
},
|
|
{
|
|
"column_id":17,
|
|
"column_name":"c2",
|
|
"table_id":1099511630877,
|
|
"obj_type":"INT",
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0,
|
|
"is_autoincrement":false,
|
|
"cs_type":"binary",
|
|
"cs_level":5,
|
|
"is_nullable":true,
|
|
"auto_filled_timestamp":false,
|
|
"default_value": {
|
|
"NULL":"NULL"
|
|
},
|
|
"expression": {
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
}
|
|
],
|
|
"select": [
|
|
{
|
|
"expression": {
|
|
"item_type":"T_OP_ADD",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"BIGINT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0,
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"children": [
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":1
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
0
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":16,
|
|
"expr_level":0
|
|
},
|
|
{
|
|
"item_type":"T_REF_COLUMN",
|
|
"result_type": {
|
|
"meta": {
|
|
"type":"INT",
|
|
"collation":"binary",
|
|
"coercibility":"NUMERIC"
|
|
},
|
|
"accuracy": {
|
|
"length":11,
|
|
"precision":11,
|
|
"scale":0
|
|
},
|
|
"flag":0
|
|
},
|
|
"expr_info": [
|
|
"IS_COLUMN",
|
|
"CNT_COLUMN"
|
|
],
|
|
"rel_id": [
|
|
1
|
|
],
|
|
"base_column_id": [
|
|
1
|
|
],
|
|
"alias_column_id": [
|
|
],
|
|
"table_id":1099511630877,
|
|
"column_id":17,
|
|
"expr_level":0
|
|
}
|
|
]
|
|
},
|
|
"table_id":-1,
|
|
"column_id":65519,
|
|
"is_alias":false,
|
|
"alias_name":"c1 + c2",
|
|
"expr_name":"c1 + c2",
|
|
"obj_type":"BIGINT",
|
|
"length":65535,
|
|
"precision":-1,
|
|
"scale":0,
|
|
"default": {
|
|
"NULL":"NULL"
|
|
},
|
|
"nullable":true
|
|
}
|
|
],
|
|
"distinct":false,
|
|
"from": [
|
|
{
|
|
"table_id":1099511630877,
|
|
"is_join":false
|
|
}
|
|
],
|
|
"where": [
|
|
],
|
|
"group_by": [
|
|
],
|
|
"having": [
|
|
],
|
|
"aggr_func": [
|
|
],
|
|
"order_by": [
|
|
],
|
|
"limit":null,
|
|
"offset":null,
|
|
"for_update":false,
|
|
"wait":-1,
|
|
"show_stmt_ctx": {
|
|
"is_from_show_stmt":false,
|
|
"global_scope":false,
|
|
"tenant_id":-1,
|
|
"show_database_id":-1,
|
|
"show_table_id":-1,
|
|
"grants_user_id":-1
|
|
},
|
|
"when": [
|
|
],
|
|
"hint": {
|
|
"read_static":false,
|
|
"frozen_version":-1,
|
|
"topk_precision":-1,
|
|
"sharding_minimum_row_count":0,
|
|
"query_timeout":-1,
|
|
"hotspot":false,
|
|
"index": [
|
|
],
|
|
"read_consistency":0,
|
|
"join_ordered":false,
|
|
"join_order": [
|
|
],
|
|
"merge_hint_ids": [
|
|
],
|
|
"hash_hint_ids": [
|
|
],
|
|
"nl_hint_ids": [
|
|
],
|
|
"part_hints": [
|
|
]
|
|
},
|
|
"query_context": {
|
|
"param_num":0,
|
|
"fetch_cur_time":true,
|
|
"calculable_items": [
|
|
]
|
|
},
|
|
"current_level":0,
|
|
"equal_sets": [
|
|
],
|
|
"child_stmts": [
|
|
]
|
|
}
|
|
}
|