From ae6eea62f174c744c468fb55f268b506389278b0 Mon Sep 17 00:00:00 2001
From: xianyu-w <707512433@qq.com>
Date: Thu, 9 Mar 2023 12:47:20 +0000
Subject: [PATCH] Fix a dblink bug and disable pdml hint for dblink

---
 src/sql/resolver/dml/ob_hint.cpp                   | 4 +++-
 src/sql/rewrite/ob_transform_simplify_subquery.cpp | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/sql/resolver/dml/ob_hint.cpp b/src/sql/resolver/dml/ob_hint.cpp
index 398fa6e45b..72c2dc2722 100644
--- a/src/sql/resolver/dml/ob_hint.cpp
+++ b/src/sql/resolver/dml/ob_hint.cpp
@@ -448,7 +448,9 @@ int ObGlobalHint::print_global_hint(PlanText &plan_text, const bool ignore_paral
   }
   if (OB_SUCC(ret) && ObPDMLOption::NOT_SPECIFIED != pdml_option_) { //PDML
     if (ObPDMLOption::ENABLE == pdml_option_) {
-      PRINT_GLOBAL_HINT_STR("ENABLE_PARALLEL_DML");
+      if (!ignore_parallel) {
+        PRINT_GLOBAL_HINT_STR("ENABLE_PARALLEL_DML");
+      }
     } else if (ObPDMLOption::DISABLE == pdml_option_) {
       PRINT_GLOBAL_HINT_STR("DISABLE_PARALLEL_DML");
     } else {
diff --git a/src/sql/rewrite/ob_transform_simplify_subquery.cpp b/src/sql/rewrite/ob_transform_simplify_subquery.cpp
index 71862339f0..86cdbe3551 100644
--- a/src/sql/rewrite/ob_transform_simplify_subquery.cpp
+++ b/src/sql/rewrite/ob_transform_simplify_subquery.cpp
@@ -1463,8 +1463,8 @@ int ObTransformSimplifySubquery::eliminate_subquery_in_exists(ObDMLStmt *stmt,
     } else if (OB_FAIL(ObOptimizerUtil::remove_item(stmt->get_subquery_exprs(), subq_expr))) {
       LOG_WARN("remove expr failed", K(ret));
     } else {
-      ObConstRawExpr *c_expr = NULL;
-      if (OB_FAIL(ObRawExprUtils::build_const_int_expr(*expr_factory, ObIntType, (T_OP_EXISTS == expr->get_expr_type()), c_expr))) {
+      ObRawExpr *c_expr = NULL;
+      if (OB_FAIL(ObRawExprUtils::build_const_bool_expr(expr_factory, c_expr, (T_OP_EXISTS == expr->get_expr_type())))) {
         LOG_WARN("failed to create expr", K(ret));
       } else if (OB_ISNULL(c_expr)) {
         ret = OB_ERR_UNEXPECTED;