[CP] fix application context treat NULL as empty string

2025-03-15 20:16:57 +00:00
parent 3f0e01e759
commit 8f04533b50
1 changed files with 5 additions and 1 deletions
--- a/src/sql/engine/expr/ob_expr_sys_context.cpp
+++ b/src/sql/engine/expr/ob_expr_sys_context.cpp
@ -762,7 +762,11 @@ int ObExprSysContext::eval_application_context(const ObExpr &expr, ObDatum &res,
  }
  if (OB_SUCC(ret)) {
    if (exist) {
-      OX(res.set_string(out_value));
+      if (out_value.empty()) {
+        res.set_null();
+      } else {
+        res.set_string(out_value);
+      }
    } else {
      res.set_null();
    }