diff options
| -rw-r--r-- | src/backend/tcop/dest.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/backend/tcop/dest.c b/src/backend/tcop/dest.c index c952cbea8bd..6afaa153cad 100644 --- a/src/backend/tcop/dest.c +++ b/src/backend/tcop/dest.c @@ -178,17 +178,18 @@ EndCommand(const QueryCompletion *qc, CommandDest dest, bool force_undecorated_o /* * We assume the tagname is plain ASCII and therefore requires no * encoding conversion. - * - * We no longer display LastOid, but to preserve the wire - * protocol, we write InvalidOid where the LastOid used to be - * written. - * - * All cases where LastOid was written also write nprocessed - * count, so just Assert that rather than having an extra test. */ tag = qc->commandTag; tagname = GetCommandTagName(tag); + /* + * In PostgreSQL versions 11 and earlier, it was possible to + * create a table WITH OIDS. When inserting into such a table, + * INSERT used to include the Oid of the inserted record in the + * completion tag. To maintain compatibility in the wire + * protocol, we now write a "0" (for InvalidOid) in the location + * where we once wrote the new record's Oid. + */ if (command_tag_display_rowcount(tag) && !force_undecorated_output) snprintf(completionTag, COMPLETION_TAG_BUFSIZE, tag == CMDTAG_INSERT ? |