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fix count_to_exists bug

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yinyj17 2022-11-11 02:37:30 +00:00 committed by wangzelin.wzl
parent ea81e24605
commit 5c2a7ab5d9
1 changed files with 17 additions and 9 deletions
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26
src/sql/rewrite/ob_transform_count_to_exists.cpp
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@ -275,7 +275,7 @@ int ObTransformCountToExists::get_trans_type(ObRawExpr *expr, ObRawExpr *&val_pa
if (OB_ISNULL(first_param) || OB_ISNULL(second_param)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret), K(first_param), K(second_param));
} else if (first_param->is_const_expr() && second_param->is_query_ref_expr()) {
} else if (first_param->is_static_scalar_const_expr() && second_param->is_query_ref_expr()) {
val_param = first_param;
subquery_param = second_param;
switch (expr->get_expr_type()) {
@ -289,7 +289,7 @@ int ObTransformCountToExists::get_trans_type(ObRawExpr *expr, ObRawExpr *&val_pa
default:
break;
}
} else if (first_param->is_query_ref_expr() && second_param->is_const_expr()) {
} else if (first_param->is_query_ref_expr() && second_param->is_static_scalar_const_expr()) {
subquery_param = first_param;
val_param = second_param;
switch (expr->get_expr_type()) {
@ -325,9 +325,6 @@ int ObTransformCountToExists::check_sel_expr_valid(ObRawExpr *select_expr,
} else if (OB_ISNULL(param = select_expr->get_param_expr(0))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get unexpected null", K(ret));
} else if (param->is_const_expr()) {
// count(const)
is_sel_expr_valid = true;
} else if (!param->has_flag(CNT_SUB_QUERY)) {
is_sel_expr_valid = true;
count_param = param;
@ -404,10 +401,21 @@ int ObTransformCountToExists::do_transform(ObDMLStmt *stmt,
// ->
// select * from t1 where exists (select 1 from t1 where to_char(c1, '') is not null);
ObRawExpr *not_null_cond = NULL;
if (OB_FAIL(ObRawExprUtils::build_is_not_null_expr(*ctx_->expr_factory_,
trans_param.count_param_,
true,
not_null_cond))) {
bool is_not_null = true;
ObArray<ObRawExpr *> constraints;
if (OB_FAIL(ObTransformUtils::is_expr_not_null(ctx_, subquery, trans_param.count_param_,
NULLABLE_SCOPE::NS_WHERE,
is_not_null,
&constraints))) {
LOG_WARN("failed to check whether expr is nullable", K(ret));
} else if (is_not_null) {
if (OB_FAIL(ObTransformUtils::add_param_not_null_constraint(*ctx_, constraints))) {
LOG_WARN("failed to add param not null constraint", K(ret));
}
} else if (OB_FAIL(ObRawExprUtils::build_is_not_null_expr(*ctx_->expr_factory_,
trans_param.count_param_,
true,
not_null_cond))) {
LOG_WARN("failed to build is not null expr", K(ret));
} else if (OB_FAIL(subquery->get_condition_exprs().push_back(not_null_cond))) {
LOG_WARN("failed to append not null cond expr", K(ret));