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1d05feea1b4889c3dbc8c3cc086abc55884bc190
doris/be/src/exec/schema_scanner/schema_columns_scanner.cpp
mch_ucchi 1d05feea1b [Feature](Nereids) add executable function to support fold constant for functions (#18209) 
1. Add date-time functions for fold constant for Nereids.
This is the list of executable date-time function nereids supports up to now:
- now()
- now(int)
- current_timestamp()
- current_timestamp(int)
- localtime()
- localtimestamp()
- curdate()
- current_date()
- curtime()
- current_time()
- date_{add/sub}(),{years/months/days/hours/minutes/seconds}_{add/sub}()
- datediff()
- {date/datev2}()
- {year/quarter/month/day/hour/minute/second}()
- dayof{year/month/week}()
- date_format()
- date_trunc()
- from_days()
- last_day()
- to_monday()
- from_unixtime()
- unix_timestamp()
- utc_timestamp()
- to_date()
- to_days()
- str_to_date()
- makedate()

2. solved problem:
- enable datev2/datetimev2 default.
- refactor Nereids foldConstantOnFE and support fold nested expression.
- separate the executable into multi-files for easily-reading and adding new functions
2023-05-17 21:26:31 +08:00

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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#include "exec/schema_scanner/schema_columns_scanner.h"
#include <fmt/format.h>
#include <gen_cpp/Descriptors_types.h>
#include <gen_cpp/FrontendService_types.h>
#include <gen_cpp/Types_types.h>
#include <cstdint>
#include "exec/schema_scanner/schema_helper.h"
#include "runtime/define_primitive_type.h"
#include "util/runtime_profile.h"
#include "vec/common/string_ref.h"
namespace doris {
class RuntimeState;
namespace vectorized {
class Block;
} // namespace vectorized
std::vector<SchemaScanner::ColumnDesc> SchemaColumnsScanner::_s_col_columns = {
// name, type, size, is_null
{"TABLE_CATALOG", TYPE_VARCHAR, sizeof(StringRef), true},
{"TABLE_SCHEMA", TYPE_VARCHAR, sizeof(StringRef), false},
{"TABLE_NAME", TYPE_VARCHAR, sizeof(StringRef), false},
{"COLUMN_NAME", TYPE_VARCHAR, sizeof(StringRef), false},
{"ORDINAL_POSITION", TYPE_BIGINT, sizeof(int64_t), false},
{"COLUMN_DEFAULT", TYPE_VARCHAR, sizeof(StringRef), true},
{"IS_NULLABLE", TYPE_VARCHAR, sizeof(StringRef), false},
{"DATA_TYPE", TYPE_VARCHAR, sizeof(StringRef), false},
{"CHARACTER_MAXIMUM_LENGTH", TYPE_BIGINT, sizeof(int64_t), true},
{"CHARACTER_OCTET_LENGTH", TYPE_BIGINT, sizeof(int64_t), true},
{"NUMERIC_PRECISION", TYPE_BIGINT, sizeof(int64_t), true},
{"NUMERIC_SCALE", TYPE_BIGINT, sizeof(int64_t), true},
{"DATETIME_PRECISION", TYPE_BIGINT, sizeof(int64_t), true},
{"CHARACTER_SET_NAME", TYPE_VARCHAR, sizeof(StringRef), true},
{"COLLATION_NAME", TYPE_VARCHAR, sizeof(StringRef), true},
{"COLUMN_TYPE", TYPE_VARCHAR, sizeof(StringRef), false},
{"COLUMN_KEY", TYPE_VARCHAR, sizeof(StringRef), false},
{"EXTRA", TYPE_VARCHAR, sizeof(StringRef), false},
{"PRIVILEGES", TYPE_VARCHAR, sizeof(StringRef), false},
{"COLUMN_COMMENT", TYPE_VARCHAR, sizeof(StringRef), false},
{"COLUMN_SIZE", TYPE_BIGINT, sizeof(int64_t), true},
{"DECIMAL_DIGITS", TYPE_BIGINT, sizeof(int64_t), true},
{"GENERATION_EXPRESSION", TYPE_VARCHAR, sizeof(StringRef), true},
{"SRS_ID", TYPE_BIGINT, sizeof(int64_t), true},
};
SchemaColumnsScanner::SchemaColumnsScanner()
: SchemaScanner(_s_col_columns, TSchemaTableType::SCH_COLUMNS),
_db_index(0),
_table_index(0) {}
SchemaColumnsScanner::~SchemaColumnsScanner() = default;
Status SchemaColumnsScanner::start(RuntimeState* state) {
SCOPED_TIMER(_get_db_timer);
if (!_is_init) {
return Status::InternalError("schema columns scanner not inited.");
}
// get all database
TGetDbsParams db_params;
if (nullptr != _param->db) {
db_params.__set_pattern(*(_param->db));
}
if (nullptr != _param->catalog) {
db_params.__set_catalog(*(_param->catalog));
}
if (nullptr != _param->current_user_ident) {
db_params.__set_current_user_ident(*_param->current_user_ident);
} else {
if (nullptr != _param->user) {
db_params.__set_user(*(_param->user));
}
if (nullptr != _param->user_ip) {
db_params.__set_user_ip(*(_param->user_ip));
}
}
if (nullptr != _param->ip && 0 != _param->port) {
RETURN_IF_ERROR(
SchemaHelper::get_db_names(*(_param->ip), _param->port, db_params, &_db_result));
} else {
return Status::InternalError("IP or port doesn't exists");
}
return Status::OK();
}
//For compatibility with mysql the result of DATA_TYPE in information_schema.columns
std::string SchemaColumnsScanner::_to_mysql_data_type_string(TColumnDesc& desc) {
switch (desc.columnType) {
case TPrimitiveType::BOOLEAN:
return "tinyint";
case TPrimitiveType::TINYINT:
return "tinyint";
case TPrimitiveType::SMALLINT:
return "smallint";
case TPrimitiveType::INT:
return "int";
case TPrimitiveType::BIGINT:
return "bigint";
case TPrimitiveType::LARGEINT:
return "bigint unsigned";
case TPrimitiveType::FLOAT:
return "float";
case TPrimitiveType::DOUBLE:
return "double";
case TPrimitiveType::VARCHAR:
case TPrimitiveType::STRING:
return "varchar";
case TPrimitiveType::CHAR:
return "char";
case TPrimitiveType::DATE:
case TPrimitiveType::DATEV2:
return "date";
case TPrimitiveType::DATETIME:
case TPrimitiveType::DATETIMEV2:
return "datetime";
case TPrimitiveType::DECIMAL32:
case TPrimitiveType::DECIMAL64:
case TPrimitiveType::DECIMAL128I:
case TPrimitiveType::DECIMALV2: {
return "decimal";
}
case TPrimitiveType::HLL: {
return "hll";
}
case TPrimitiveType::OBJECT: {
return "bitmap";
}
case TPrimitiveType::JSONB: {
return "json";
}
case TPrimitiveType::MAP: {
return "map";
}
case TPrimitiveType::ARRAY: {
return "array";
}
case TPrimitiveType::STRUCT: {
return "struct";
}
default:
return "unknown";
}
}
std::string SchemaColumnsScanner::_type_to_string(TColumnDesc& desc) {
switch (desc.columnType) {
case TPrimitiveType::BOOLEAN:
return "tinyint(1)";
case TPrimitiveType::TINYINT:
return "tinyint(4)";
case TPrimitiveType::SMALLINT:
return "smallint(6)";
case TPrimitiveType::INT:
return "int(11)";
case TPrimitiveType::BIGINT:
return "bigint(20)";
case TPrimitiveType::LARGEINT:
return "largeint";
case TPrimitiveType::FLOAT:
return "float";
case TPrimitiveType::DOUBLE:
return "double";
case TPrimitiveType::VARCHAR:
if (desc.__isset.columnLength) {
return "varchar(" + std::to_string(desc.columnLength) + ")";
} else {
return "varchar(20)";
}
case TPrimitiveType::STRING:
return "string";
case TPrimitiveType::CHAR:
if (desc.__isset.columnLength) {
return "char(" + std::to_string(desc.columnLength) + ")";
} else {
return "char(20)";
}
case TPrimitiveType::DATE:
return "date";
case TPrimitiveType::DATETIME:
return "datetime";
case TPrimitiveType::DECIMALV2: {
return fmt::format(
"decimal({}, {})",
desc.__isset.columnPrecision ? std::to_string(desc.columnPrecision) : "27",
desc.__isset.columnScale ? std::to_string(desc.columnScale) : "9");
}
case TPrimitiveType::DECIMAL32:
case TPrimitiveType::DECIMAL64:
case TPrimitiveType::DECIMAL128I: {
fmt::memory_buffer debug_string_buffer;
fmt::format_to(
debug_string_buffer, "decimalv3({}, {})",
desc.__isset.columnPrecision ? std::to_string(desc.columnPrecision) : "UNKNOWN",
desc.__isset.columnScale ? std::to_string(desc.columnScale) : "UNKNOWN");
return fmt::to_string(debug_string_buffer);
}
case TPrimitiveType::DATEV2:
return "date";
case TPrimitiveType::DATETIMEV2: {
fmt::memory_buffer debug_string_buffer;
if (!desc.__isset.columnScale || desc.columnScale == 0) {
fmt::format_to(debug_string_buffer, "datetime");
} else {
fmt::format_to(debug_string_buffer, "datetime({})",
desc.__isset.columnScale ? std::to_string(desc.columnScale) : "UNKNOWN");
}
return fmt::to_string(debug_string_buffer);
}
case TPrimitiveType::HLL: {
return "hll";
}
case TPrimitiveType::OBJECT: {
return "bitmap";
}
case TPrimitiveType::JSONB: {
return "json";
}
default:
return "unknown";
}
}
Status SchemaColumnsScanner::_get_new_desc() {
SCOPED_TIMER(_get_describe_timer);
TDescribeTablesParams desc_params;
desc_params.__set_db(_db_result.dbs[_db_index - 1]);
if (_db_result.__isset.catalogs) {
desc_params.__set_catalog(_db_result.catalogs[_db_index - 1]);
}
for (int i = 0; i < 100; ++i) {
if (_table_index >= _table_result.tables.size()) {
break;
}
desc_params.tables_name.push_back(_table_result.tables[_table_index++]);
}
if (nullptr != _param->current_user_ident) {
desc_params.__set_current_user_ident(*(_param->current_user_ident));
} else {
if (nullptr != _param->user) {
desc_params.__set_user(*(_param->user));
}
if (nullptr != _param->user_ip) {
desc_params.__set_user_ip(*(_param->user_ip));
}
}
if (nullptr != _param->ip && 0 != _param->port) {
RETURN_IF_ERROR(SchemaHelper::describe_tables(*(_param->ip), _param->port, desc_params,
&_desc_result));
} else {
return Status::InternalError("IP or port doesn't exists");
}
return Status::OK();
}
Status SchemaColumnsScanner::_get_new_table() {
SCOPED_TIMER(_get_table_timer);
TGetTablesParams table_params;
table_params.__set_db(_db_result.dbs[_db_index]);
if (_db_result.__isset.catalogs) {
table_params.__set_catalog(_db_result.catalogs[_db_index]);
}
_db_index++;
if (nullptr != _param->table) {
table_params.__set_pattern(*(_param->table));
}
if (nullptr != _param->current_user_ident) {
table_params.__set_current_user_ident(*(_param->current_user_ident));
} else {
if (nullptr != _param->user) {
table_params.__set_user(*(_param->user));
}
if (nullptr != _param->user_ip) {
table_params.__set_user_ip(*(_param->user_ip));
}
}
if (nullptr != _param->ip && 0 != _param->port) {
RETURN_IF_ERROR(SchemaHelper::get_table_names(*(_param->ip), _param->port, table_params,
&_table_result));
} else {
return Status::InternalError("IP or port doesn't exists");
}
_table_index = 0;
return Status::OK();
}
Status SchemaColumnsScanner::get_next_block(vectorized::Block* block, bool* eos) {
if (!_is_init) {
return Status::InternalError("use this class before inited.");
}
if (nullptr == block || nullptr == eos) {
return Status::InternalError("input parameter is nullptr.");
}
while (_table_index >= _table_result.tables.size()) {
if (_db_index < _db_result.dbs.size()) {
RETURN_IF_ERROR(_get_new_table());
} else {
*eos = true;
return Status::OK();
}
}
RETURN_IF_ERROR(_get_new_desc());
*eos = false;
return _fill_block_impl(block);
}
Status SchemaColumnsScanner::_fill_block_impl(vectorized::Block* block) {
SCOPED_TIMER(_fill_block_timer);
auto columns_num = _desc_result.columns.size();
std::vector<void*> null_datas(columns_num, nullptr);
std::vector<void*> datas(columns_num);
// TABLE_CATALOG
{
if (!_db_result.__isset.catalogs) {
fill_dest_column_for_range(block, 0, null_datas);
} else {
std::string catalog_name = _db_result.catalogs[_db_index - 1];
StringRef str = StringRef(catalog_name.c_str(), catalog_name.size());
for (int i = 0; i < columns_num; ++i) {
datas[i] = &str;
}
fill_dest_column_for_range(block, 0, datas);
}
}
// TABLE_SCHEMA
{
std::string db_name = SchemaHelper::extract_db_name(_db_result.dbs[_db_index - 1]);
StringRef str = StringRef(db_name.c_str(), db_name.size());
for (int i = 0; i < columns_num; ++i) {
datas[i] = &str;
}
fill_dest_column_for_range(block, 1, datas);
}
// TABLE_NAME
{
StringRef strs[columns_num];
int offset_index = 0;
int cur_table_index = _table_index - _desc_result.tables_offset.size();
for (int i = 0; i < columns_num; ++i) {
while (_desc_result.tables_offset[offset_index] <= i) {
++offset_index;
++cur_table_index;
}
strs[i] = StringRef(_table_result.tables[cur_table_index].c_str(),
_table_result.tables[cur_table_index].length());
datas[i] = strs + i;
}
fill_dest_column_for_range(block, 2, datas);
}
// COLUMN_NAME
{
StringRef strs[columns_num];
for (int i = 0; i < columns_num; ++i) {
strs[i] = StringRef(_desc_result.columns[i].columnDesc.columnName.c_str(),
_desc_result.columns[i].columnDesc.columnName.length());
datas[i] = strs + i;
}
fill_dest_column_for_range(block, 3, datas);
}
// ORDINAL_POSITION
{
int64_t srcs[columns_num];
int offset_index = 0;
int columns_index = 1;
for (int i = 0; i < columns_num; ++i) {
while (_desc_result.tables_offset[offset_index] <= i) {
++offset_index;
columns_index = 1;
}
srcs[i] = columns_index++;
datas[i] = srcs + i;
}
fill_dest_column_for_range(block, 4, datas);
}
// COLUMN_DEFAULT
{ fill_dest_column_for_range(block, 5, null_datas); }
// IS_NULLABLE
{
StringRef str_yes = StringRef("YES", 3);
StringRef str_no = StringRef("NO", 2);
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.isAllowNull) {
if (_desc_result.columns[i].columnDesc.isAllowNull) {
datas[i] = &str_yes;
} else {
datas[i] = &str_no;
}
} else {
datas[i] = &str_no;
}
}
fill_dest_column_for_range(block, 6, datas);
}
// DATA_TYPE
{
std::string buffers[columns_num];
StringRef strs[columns_num];
for (int i = 0; i < columns_num; ++i) {
buffers[i] = _to_mysql_data_type_string(_desc_result.columns[i].columnDesc);
strs[i] = StringRef(buffers[i].c_str(), buffers[i].length());
datas[i] = strs + i;
}
fill_dest_column_for_range(block, 7, datas);
}
// CHARACTER_MAXIMUM_LENGTH
// For string columns, the maximum length in characters.
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
int data_type = _desc_result.columns[i].columnDesc.columnType;
if (data_type == TPrimitiveType::VARCHAR || data_type == TPrimitiveType::CHAR ||
data_type == TPrimitiveType::STRING) {
if (_desc_result.columns[i].columnDesc.__isset.columnLength) {
srcs[i] = _desc_result.columns[i].columnDesc.columnLength;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 8, datas);
}
// CHARACTER_OCTET_LENGTH
// For string columns, the maximum length in bytes.
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
int data_type = _desc_result.columns[i].columnDesc.columnType;
if (data_type == TPrimitiveType::VARCHAR || data_type == TPrimitiveType::CHAR ||
data_type == TPrimitiveType::STRING) {
if (_desc_result.columns[i].columnDesc.__isset.columnLength) {
srcs[i] = _desc_result.columns[i].columnDesc.columnLength * 4L;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 9, datas);
}
// NUMERIC_PRECISION
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.columnPrecision) {
srcs[i] = _desc_result.columns[i].columnDesc.columnPrecision;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 10, datas);
}
// NUMERIC_SCALE
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.columnScale) {
srcs[i] = _desc_result.columns[i].columnDesc.columnScale;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 11, datas);
}
// DATETIME_PRECISION
{ fill_dest_column_for_range(block, 12, null_datas); }
// CHARACTER_SET_NAME
{ fill_dest_column_for_range(block, 13, null_datas); }
// COLLATION_NAME
{ fill_dest_column_for_range(block, 14, null_datas); }
// COLUMN_TYPE
{
std::string buffers[columns_num];
StringRef strs[columns_num];
for (int i = 0; i < columns_num; ++i) {
buffers[i] = _type_to_string(_desc_result.columns[i].columnDesc);
strs[i] = StringRef(buffers[i].c_str(), buffers[i].length());
datas[i] = strs + i;
}
fill_dest_column_for_range(block, 15, datas);
}
// COLUMN_KEY
{
StringRef str = StringRef("", 0);
StringRef strs[columns_num];
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.columnKey) {
strs[i] = StringRef(_desc_result.columns[i].columnDesc.columnKey.c_str(),
_desc_result.columns[i].columnDesc.columnKey.length());
datas[i] = strs + i;
} else {
datas[i] = &str;
}
}
fill_dest_column_for_range(block, 16, datas);
}
// EXTRA
{
StringRef str = StringRef("", 0);
std::vector<void*> datas(columns_num, &str);
fill_dest_column_for_range(block, 17, datas);
}
// PRIVILEGES
{
StringRef str = StringRef("", 0);
std::vector<void*> datas(columns_num, &str);
fill_dest_column_for_range(block, 18, datas);
}
// COLUMN_COMMENT
{
StringRef strs[columns_num];
for (int i = 0; i < columns_num; ++i) {
strs[i] = StringRef(_desc_result.columns[i].comment.c_str(),
_desc_result.columns[i].comment.length());
datas[i] = strs + i;
}
fill_dest_column_for_range(block, 19, datas);
}
// COLUMN_SIZE
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.columnLength) {
srcs[i] = _desc_result.columns[i].columnDesc.columnLength;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 20, datas);
}
// DECIMAL_DIGITS
{
int64_t srcs[columns_num];
for (int i = 0; i < columns_num; ++i) {
if (_desc_result.columns[i].columnDesc.__isset.columnScale) {
srcs[i] = _desc_result.columns[i].columnDesc.columnScale;
datas[i] = srcs + i;
} else {
datas[i] = nullptr;
}
}
fill_dest_column_for_range(block, 21, datas);
}
// GENERATION_EXPRESSION
{ fill_dest_column_for_range(block, 22, null_datas); }
// SRS_ID
{ fill_dest_column_for_range(block, 23, null_datas); }
return Status::OK();
}
} // namespace doris
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