Do not report ERROR when sample rate equals 100

src/sql/engine/expr/ob_expr_elt.cpp

@@ -91,10 +91,3 @@ int ObExprElt::eval_elt(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
   }
   return ret;
 }
-
-DEF_SET_LOCAL_SESSION_VARS(ObExprElt, raw_expr) {
-  int ret = OB_SUCCESS;
-  SET_LOCAL_SYSVAR_CAPACITY(1);
-  EXPR_ADD_LOCAL_SYSVAR(share::SYS_VAR_COLLATION_CONNECTION);
-  return ret;
-}