[BUGFIX] fix lob bugs

2023-05-19 09:47:30 +00:00
parent ea2c5fc8b2
commit 2cf85600bc
3 changed files with 14 additions and 2 deletions
--- a/src/sql/engine/expr/ob_datum_cast.cpp
+++ b/src/sql/engine/expr/ob_datum_cast.cpp
@ -3324,7 +3324,12 @@ CAST_FUNC_NAME(text, raw)
      bool has_set_res = false;
      OZ(ObDatumHexUtils::hextoraw_string(expr, in_str, ctx, res_datum, has_set_res));
    } else { // blob to raw
-      res_datum.set_string(in_str.ptr(), in_str.length());
+      // empty blob treat as null in oracle
+      if (lib::is_oracle_mode() && in_str.length() == 0) {
+        res_datum.set_null();
+      } else {
+        res_datum.set_string(in_str.ptr(), in_str.length());
+      }
    }
  }
  return ret;