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Fix shared exprs bugs when create inline view

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This commit is contained in:
xianyu-w
2023-02-14 12:12:15 +00:00
committed by ob-robot
parent 50a6b3cda3
commit 0664c26d30
24 changed files with 911 additions and 1452 deletions
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54
src/sql/rewrite/ob_transform_simplify_subquery.cpp
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@ -588,6 +588,7 @@ int ObTransformSimplifySubquery::try_push_down_outer_join_conds(ObDMLStmt *stmt,
} else {
ObSEArray<ObRawExpr*, 16> push_down_conds;
TableItem *view_item = NULL;
TableItem *right_table = join_table->right_table_;
if (OB_FAIL(get_push_down_conditions(stmt,
join_table,
join_table->get_join_conditions(),
@ -595,12 +596,19 @@ int ObTransformSimplifySubquery::try_push_down_outer_join_conds(ObDMLStmt *stmt,
LOG_WARN("failed to get_push_down_conditions", K(ret), K(join_table));
} else if (push_down_conds.empty()) {
/*do nothing*/
} else if (OB_FAIL(ObTransformUtils::create_view_with_table(stmt, ctx_,
join_table->right_table_,
view_item))) {
LOG_WARN("failed to create view with table", K(ret));
} else if (OB_FAIL(push_down_on_condition(stmt, join_table, push_down_conds))) {
LOG_WARN("failed to push down on condition", K(ret));
} else if (ObOptimizerUtil::remove_item(join_table->get_join_conditions(), push_down_conds)) {
LOG_WARN("failed to remove item", K(ret));
} else if (OB_FAIL(ObTransformUtils::replace_with_empty_view(ctx_,
stmt,
view_item,
right_table))) {
LOG_WARN("failed to create empty view table", K(ret));
} else if (OB_FAIL(ObTransformUtils::create_inline_view(ctx_,
stmt,
view_item,
right_table,
&push_down_conds))) {
LOG_WARN("failed to create inline view", K(ret));
} else {
trans_happened = true;
}
@ -608,40 +616,6 @@ int ObTransformSimplifySubquery::try_push_down_outer_join_conds(ObDMLStmt *stmt,
return ret;
}
//将left join 部分连接条件conds 下推到 right generate table
//right table 为仅含 select 输出的 generate table
int ObTransformSimplifySubquery::push_down_on_condition(ObDMLStmt *stmt,
JoinedTable *join_table,
ObIArray<ObRawExpr*> &conds) {
int ret = OB_SUCCESS;
ObSEArray<ObRawExpr *, 16> new_conds;
ObSelectStmt *child_stmt = NULL;
if (OB_ISNULL(stmt) || OB_ISNULL(ctx_) || OB_ISNULL(join_table) ||
OB_ISNULL(ctx_->expr_factory_) || OB_ISNULL(ctx_->allocator_) ||
OB_ISNULL(join_table->right_table_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected NULL", K(ret));
} else if (!join_table->is_left_join() || !join_table->right_table_->is_generated_table()
|| OB_ISNULL(child_stmt = join_table->right_table_->ref_query_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected join table", K(ret));
} else if (OB_FAIL(ObOptimizerUtil::remove_item(join_table->get_join_conditions(), conds))) {
LOG_WARN("failed to remove item", K(ret));
} else if (OB_FAIL(ObTransformUtils::move_expr_into_view(*ctx_->expr_factory_,
*stmt,
*join_table->right_table_,
conds,
new_conds))) {
LOG_WARN("failed to move expr into view", K(ret));
} else if (OB_FAIL(child_stmt->add_condition_exprs(new_conds))) {
LOG_WARN("failed to add new conditions exprs", K(ret));
} else if (OB_FAIL(stmt->formalize_stmt(ctx_->session_info_))) {
LOG_WARN("failed to formalize stmt", K(ret));
}
return ret;
}
int ObTransformSimplifySubquery::add_limit_for_exists_subquery(ObDMLStmt *stmt,
bool &trans_happened)
{