From 95fd5c89ffa18f6958f0135013046f798cced72b Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Sun, 1 Oct 2023 12:09:26 -0400 Subject: [PATCH] In COPY FROM, fail cleanly when unsupported encoding conversion is needed. In recent releases, such cases fail with "cache lookup failed for function 0" rather than complaining that the conversion function doesn't exist as prior versions did. Seems to be a consequence of sloppy refactoring in commit f82de5c46. Add the missing error check. Per report from Pierre Fortin. Back-patch to v14 where the oversight crept in. Discussion: https://postgr.es/m/20230929163739.3bea46e5.pfortin@pfortin.com --- src/backend/commands/copyfrom.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/backend/commands/copyfrom.c b/src/backend/commands/copyfrom.c index 763cfb23728..c6dbd972761 100644 --- a/src/backend/commands/copyfrom.c +++ b/src/backend/commands/copyfrom.c @@ -1337,6 +1337,12 @@ BeginCopyFrom(ParseState *pstate, cstate->need_transcoding = true; cstate->conversion_proc = FindDefaultConversionProc(cstate->file_encoding, GetDatabaseEncoding()); + if (!OidIsValid(cstate->conversion_proc)) + ereport(ERROR, + (errcode(ERRCODE_UNDEFINED_FUNCTION), + errmsg("default conversion function for encoding \"%s\" to \"%s\" does not exist", + pg_encoding_to_char(cstate->file_encoding), + pg_encoding_to_char(GetDatabaseEncoding())))); } cstate->copy_src = COPY_FILE; /* default */