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replace ts related to ddl with scn.

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This commit is contained in:
obdev
2022-11-28 02:21:13 +00:00
committed by ob-robot
parent bbec6aff49
commit 8a4d14122f
539 changed files with 17685 additions and 173434 deletions
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31
src/sql/rewrite/ob_transform_join_limit_pushdown.cpp
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@ -74,6 +74,19 @@ bool ObTransformJoinLimitPushDown::LimitPushDownHelper::is_table_lazy_join(Table
return ret;
}
uint64_t ObTransformJoinLimitPushDown::LimitPushDownHelper::get_max_table_id() const
{
uint64_t max_table_id = OB_INVALID_ID;
const TableItem *table = NULL;
for (int64_t i = 0; i < pushdown_tables_.count(); ++i) {
if (OB_NOT_NULL(table = pushdown_tables_.at(i))
&& (max_table_id < table->table_id_ || OB_INVALID_ID == max_table_id)) {
max_table_id = table->table_id_;
}
}
return max_table_id;
}
int ObTransformJoinLimitPushDown::UnionFind::init()
{
int ret = OB_SUCCESS;
@ -195,6 +208,10 @@ int ObTransformJoinLimitPushDown::transform_one_stmt(common::ObIArray<ObParentDM
// do nothing
} else if (OB_FAIL(check_stmt_validity(stmt, helpers, is_valid))) {
LOG_WARN("failed to check stmt validity", K(ret));
} else if (!is_valid) {
// do nothing
} else if (OB_FAIL(sort_pushdown_helpers(helpers))) {
LOG_WARN("failed to sort pushdown helpers", K(ret));
} else if (is_valid) {
LOG_TRACE("start to pushdown limit into join", K(helpers));
}
@ -225,6 +242,20 @@ int ObTransformJoinLimitPushDown::transform_one_stmt(common::ObIArray<ObParentDM
return ret;
}
int ObTransformJoinLimitPushDown::sort_pushdown_helpers(ObSEArray<LimitPushDownHelper*, 4> &helpers)
{
int ret = OB_SUCCESS;
auto cmp_func = [](LimitPushDownHelper* l_helper, LimitPushDownHelper* r_helper) {
if (OB_ISNULL(l_helper) || OB_ISNULL(r_helper)) {
return false;
} else {
return l_helper->get_max_table_id() > r_helper->get_max_table_id();
}
};
std::sort(helpers.begin(), helpers.end(), cmp_func);
return ret;
}
int ObTransformJoinLimitPushDown::check_stmt_validity(ObDMLStmt *stmt,
ObIArray<LimitPushDownHelper*> &helpers,
bool &is_valid)