diff --git a/src/box/sql/select.c b/src/box/sql/select.c
index e217c19..778de2c 100644
--- a/src/box/sql/select.c
+++ b/src/box/sql/select.c
@@ -1466,25 +1466,25 @@ sql_expr_list_to_key_info(struct Parse *parse, struct ExprList *list, int start)
/*
 * Name of the connection operator, used for error messages.
 */
-static const char *
-selectOpName(int id)
+const char *
+select_op_name(int op_id)

{
- char *z;
- switch (id) {
+ const char *op_name;

+ switch (op_id) {
case TK_ALL:
- z = "UNION ALL";
+ op_name = "UNION ALL";
break;
case TK_INTERSECT:
- z = "INTERSECT";
+ op_name = "INTERSECT";
break;
case TK_EXCEPT:
- z = "EXCEPT";
+ op_name = "EXCEPT";
break;
default:
- z = "UNION";
+ op_name = "UNION";
break;
}
- return z;
+ return op_name;
}