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[FEAT MERGE]: online optimizer stats gather.

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Co-authored-by: obdev <obdev@oceanbase.com>
This commit is contained in:
Monk-Liu
2023-01-28 13:54:38 +08:00
committed by ob-robot
parent 735401c8d7
commit 9484175163
74 changed files with 3416 additions and 85 deletions
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43
src/sql/engine/cmd/ob_table_executor.cpp
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@ -38,6 +38,7 @@
#include "sql/code_generator/ob_expr_generator_impl.h"
#include "sql/engine/cmd/ob_partition_executor_utils.h"
#include "sql/parser/ob_parser.h"
#include "share/system_variable/ob_sys_var_class_type.h"
#include "sql/ob_select_stmt_printer.h"
#include "observer/ob_server_struct.h"
@ -98,6 +99,9 @@ int ObCreateTableExecutor::prepare_ins_arg(ObCreateTableStmt &stmt,
int64_t pos1 = 0;
bool is_set_subquery = false;
bool is_oracle_mode = lib::is_oracle_mode();
bool no_osg_hint = false;
bool osg_hint = false;
bool online_sys_var = false;
const ObString &db_name = stmt.get_database_name();
const ObString &tab_name = stmt.get_table_name();
const char sep_char = is_oracle_mode? '"': '`';
@ -111,18 +115,37 @@ int ObCreateTableExecutor::prepare_ins_arg(ObCreateTableStmt &stmt,
if (OB_ISNULL(buf)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_ERROR("allocate memory failed");
} else if (OB_ISNULL(select_stmt)) {
} else if (OB_ISNULL(select_stmt) || OB_ISNULL(select_stmt->get_query_ctx()) || OB_ISNULL(my_session)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("select stmt should not be null", K(ret));
} else if (OB_FAIL(databuff_printf(buf, buf_len, pos1, "insert into %c%.*s%c.%c%.*s%c",
sep_char,
db_name.length(),
db_name.ptr(),
sep_char,
sep_char,
tab_name.length(),
tab_name.ptr(),
sep_char))) {
} else {
//get hint
no_osg_hint = select_stmt->get_query_ctx()->get_global_hint().has_no_gather_opt_stat_hint();
osg_hint = select_stmt->get_query_ctx()->get_global_hint().has_gather_opt_stat_hint();
//get system variable
ObObj online_sys_var_obj;
if (OB_FAIL(OB_FAIL(my_session->get_sys_variable(SYS_VAR_ONLINE_OPT_STAT_GATHER, online_sys_var_obj)))) {
LOG_WARN("fail to get sys var", K(ret));
} else {
online_sys_var = online_sys_var_obj.get_bool();
LOG_DEBUG("online opt stat gather", K(online_sys_var), K(no_osg_hint));
}
}
if (OB_FAIL(ret)) {
} else if (OB_FAIL(databuff_printf(buf, buf_len, pos1,
(!no_osg_hint && (online_sys_var || osg_hint))
? "insert /*+GATHER_OPTIMIZER_STATISTICS*/ into %c%.*s%c.%c%.*s%c"
: "insert into %c%.*s%c.%c%.*s%c",
sep_char,
db_name.length(),
db_name.ptr(),
sep_char,
sep_char,
tab_name.length(),
tab_name.ptr(),
sep_char))) {
LOG_WARN("fail to print insert into string", K(ret), K(db_name), K(tab_name));
} else if (lib::is_oracle_mode()) {
ObTableSchema &table_schema = stmt.get_create_table_arg().schema_;