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[FEAT MERGE] optimizer statistics gather enhance

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Co-authored-by: Larry955 <1412857955@qq.com>
Co-authored-by: wangt1xiuyi <13547954130@163.com>
This commit is contained in:
obdev
2023-04-28 13:11:58 +00:00
committed by ob-robot
parent 35c1be5aa1
commit 642f1c7d84
130 changed files with 8572 additions and 1563 deletions
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78
src/sql/optimizer/ob_optimizer_util.cpp
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@ -8524,74 +8524,6 @@ int ObOptimizerUtil::check_pushdown_join_filter_for_set(const ObSelectStmt &pare
return ret;
}
int ObOptimizerUtil::init_calc_part_id_expr(ObLogPlan * log_plan,
const uint64_t table_id,
const uint64_t ref_table_id,
ObRawExpr *&calc_part_id_expr)
{
int ret = OB_SUCCESS;
calc_part_id_expr = NULL;
share::schema::ObPartitionLevel part_level = share::schema::PARTITION_LEVEL_MAX;
ObSQLSessionInfo *session = NULL;
ObRawExpr *part_expr = NULL;
ObRawExpr *subpart_expr = NULL;
ObRawExpr *new_part_expr = NULL;
ObRawExpr *new_subpart_expr = NULL;
if (OB_ISNULL(log_plan) || OB_UNLIKELY(OB_INVALID_ID == ref_table_id)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get invalid argument", K(ret), K(ref_table_id));
} else if (OB_ISNULL(session = log_plan->get_optimizer_context().get_session_info())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session info is null", K(ret));
} else {
share::schema::ObSchemaGetterGuard *schema_guard = NULL;
const share::schema::ObTableSchema *table_schema = NULL;
if (OB_ISNULL(schema_guard = log_plan->get_optimizer_context().get_schema_guard())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("NULL ptr", K(ret));
} else if (OB_FAIL(schema_guard->get_table_schema(
session->get_effective_tenant_id(),
ref_table_id, table_schema))) {
LOG_WARN("get table schema failed", K(ref_table_id), K(ret));
} else if (OB_ISNULL(table_schema)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("table schema is null", K(ret), K(table_schema));
} else if (OB_FAIL(log_plan->gen_calc_part_id_expr(table_id,
ref_table_id,
CALC_PARTITION_TABLET_ID,
calc_part_id_expr))) {
LOG_WARN("failed to build calc part id expr", K(ret));
} else if (!table_schema->is_heap_table() &&
OB_NOT_NULL(calc_part_id_expr) &&
OB_FAIL(replace_gen_column(log_plan, calc_part_id_expr, calc_part_id_expr))) {
LOG_WARN("failed to replace gen column", K(ret));
} else {
// For no-pk table partitioned by generated column, it is no need to replace generated
// column as dependent exprs, because index table scan will add dependant columns
// into access_exprs_
// eg:
// create table t1(c1 int, c2 int, c3 int generated always as (c1 + 1)) partition by hash(c3);
// create index idx on t1(c2) global;
// select /*+ index(t1 idx) */ * from t1\G
// TLU
// TSC // output([pk_inc],[calc_part_id_expr(c3)], [c1]), access([pk_inc], [c1])
// For pk table partitioned by generated column, we can replace generated column by
// dependant exprs, because pk must be a superset of partition columns
// eg:
// create table t1(c1 int primary key, c2 int, c3 int generated always as (c1 + 1)) partition by hash(c3);
// create index idx on t1(c2) global;
// select /*+ index(t1 idx) */ * from t1\G
// TLU
// TSC // output([c1],[calc_part_id_expr(c1 + 1)]), access([c1])
LOG_TRACE("log table scan init calc part id expr", KPC(calc_part_id_expr));
}
}
return ret;
}
int ObOptimizerUtil::replace_column_with_select_for_partid(const ObInsertStmt *stmt,
ObOptimizerContext &opt_ctx,
ObRawExpr *&calc_part_id_expr)
@ -8664,11 +8596,14 @@ int ObOptimizerUtil::replace_gen_column(ObLogPlan *log_plan, ObRawExpr *part_exp
int ObOptimizerUtil::truncate_string_for_opt_stats(const ObObj *old_obj,
ObIAllocator &alloc,
const ObObj *&new_obj)
ObObj *&new_obj)
{
int ret = OB_SUCCESS;
bool is_truncated = false;
if (old_obj->is_string_type()) {
if (OB_ISNULL(old_obj)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null");
} else if (old_obj->is_string_type()) {
ObString str;
if (OB_FAIL(old_obj->get_string(str))) {
LOG_WARN("failed to get string", K(ret), K(str));
@ -8698,7 +8633,8 @@ int ObOptimizerUtil::truncate_string_for_opt_stats(const ObObj *old_obj,
}
}
if (OB_SUCC(ret) && !is_truncated) {
new_obj = old_obj;
new_obj = const_cast<ObObj *>(old_obj);
}
LOG_TRACE("Succeed to truncate string obj for opt stats", KPC(old_obj), KPC(new_obj), K(is_truncated));
return ret;
}