From 4806f26f9e4273888cbf85f42b3bdc5e9d950ba6 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Fri, 7 Oct 2016 09:51:18 -0400 Subject: [PATCH] Fix pg_dump to work against pre-9.0 servers again. getBlobs' queries for pre-9.0 servers were broken in two ways: the 7.x/8.x query uses DISTINCT so it can't have unspecified-type NULLs in the target list, and both that query and the 7.0 one failed to provide the correct output column labels, so that the subsequent code to extract data from the PGresult would fail. Back-patch to 9.6 where the breakage was introduced (by commit 23f34fa4b). Amit Langote and Tom Lane Discussion: <0a3e7a0e-37bd-8427-29bd-958135862f0a@lab.ntt.co.jp> --- src/bin/pg_dump/pg_dump.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c index 299e88788e..fde7f59c3d 100644 --- a/src/bin/pg_dump/pg_dump.c +++ b/src/bin/pg_dump/pg_dump.c @@ -2875,19 +2875,20 @@ getBlobs(Archive *fout) else if (fout->remoteVersion >= 90000) appendPQExpBuffer(blobQry, "SELECT oid, (%s lomowner) AS rolname, lomacl, " - "NULL AS rlomacl, NULL as initlomacl, " - "NULL as initrlomacl " + "NULL AS rlomacl, NULL AS initlomacl, " + "NULL AS initrlomacl " " FROM pg_largeobject_metadata", username_subquery); else if (fout->remoteVersion >= 70100) appendPQExpBufferStr(blobQry, - "SELECT DISTINCT loid, NULL::oid, NULL, " - "NULL AS rlomacl, NULL AS initlomacl, " - "NULL AS initrlomacl " + "SELECT DISTINCT loid AS oid, " + "NULL::name AS rolname, NULL::oid AS lomacl, " + "NULL::oid AS rlomacl, NULL::oid AS initlomacl, " + "NULL::oid AS initrlomacl " " FROM pg_largeobject"); else appendPQExpBufferStr(blobQry, - "SELECT oid, NULL::oid, NULL, " + "SELECT oid, NULL AS rolname, NULL AS lomacl, " "NULL AS rlomacl, NULL AS initlomacl, " "NULL AS initrlomacl " " FROM pg_class WHERE relkind = 'l'"); @@ -2922,11 +2923,11 @@ getBlobs(Archive *fout) binfo[i].initblobacl = pg_strdup(PQgetvalue(res, i, i_initlomacl)); binfo[i].initrblobacl = pg_strdup(PQgetvalue(res, i, i_initrlomacl)); - if (PQgetisnull(res, i, i_lomacl) && PQgetisnull(res, i, i_rlomacl) && + if (PQgetisnull(res, i, i_lomacl) && + PQgetisnull(res, i, i_rlomacl) && PQgetisnull(res, i, i_initlomacl) && PQgetisnull(res, i, i_initrlomacl)) binfo[i].dobj.dump &= ~DUMP_COMPONENT_ACL; - } /*