From d1b4e23a1b24782e9de16d748508c46354e42423 Mon Sep 17 00:00:00 2001 From: Atsushi Torikoshi Date: Sun, 3 Aug 2025 17:55:09 +0900 Subject: [PATCH v1] COPY TO: provide hint when WHERE clause is used Provide a hint suggesting COPY query TO when a WHERE clause is specified, similar to the hint already given for views or others. --- src/backend/parser/gram.y | 1 + 1 file changed, 1 insertion(+) diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y index db43034b9db..9fd48acb1f8 100644 --- a/src/backend/parser/gram.y +++ b/src/backend/parser/gram.y @@ -3442,6 +3442,7 @@ CopyStmt: COPY opt_binary qualified_name opt_column_list ereport(ERROR, (errcode(ERRCODE_SYNTAX_ERROR), errmsg("WHERE clause not allowed with COPY TO"), + errhint("Try the COPY (SELECT ... WHERE ...) TO variant."), parser_errposition(@11))); n->options = NIL; -- 2.48.1