From 331db3f52308271470ed98e4c5a3420dabf3cf7c Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Mon, 8 Aug 2022 23:03:24 +0800
Subject: [PATCH] CHAR_LENGTH() output incorrect results when used with
 subquery

---
 src/sql/engine/expr/ob_expr_char_length.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sql/engine/expr/ob_expr_char_length.cpp b/src/sql/engine/expr/ob_expr_char_length.cpp
index bd0474e84..62c40a3e7 100644
--- a/src/sql/engine/expr/ob_expr_char_length.cpp
+++ b/src/sql/engine/expr/ob_expr_char_length.cpp
@@ -72,7 +72,7 @@ int ObExprCharLength::eval_char_length(const ObExpr& expr, ObEvalCtx& ctx, ObDat
   ObObjTypeClass in_tc = ob_obj_type_class(expr.args_[0]->datum_meta_.type_);
   if (!ob_is_castable_type_class(in_tc)) {
     res.set_null();
-  } else if (expr.eval_param_value(ctx, arg)) {
+  } else if (OB_FAIL(expr.eval_param_value(ctx, arg))) {
     LOG_WARN("eval arg failed", K(ret));
   } else if (arg->is_null()) {
     res.set_null();
-- 
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