From 5f7b58fad8f45c69bb67944779dce67e2f481995 Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Mon, 13 Dec 2010 12:34:26 -0500 Subject: Generalize concept of temporary relations to "relation persistence". This commit replaces pg_class.relistemp with pg_class.relpersistence; and also modifies the RangeVar node type to carry relpersistence rather than istemp. It also removes removes rd_istemp from RelationData and instead performs the correct computation based on relpersistence. For clarity, we add three new macros: RelationNeedsWAL(), RelationUsesLocalBuffers(), and RelationUsesTempNamespace(), so that we can clarify the purpose of each check that previous depended on rd_istemp. This is intended as infrastructure for the upcoming unlogged tables patch, as well as for future possible work on global temporary tables. --- src/backend/utils/adt/dbsize.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) (limited to 'src/backend/utils/adt/dbsize.c') diff --git a/src/backend/utils/adt/dbsize.c b/src/backend/utils/adt/dbsize.c index f5250a263cd..e352cdafb3b 100644 --- a/src/backend/utils/adt/dbsize.c +++ b/src/backend/utils/adt/dbsize.c @@ -612,16 +612,26 @@ pg_relation_filepath(PG_FUNCTION_ARGS) PG_RETURN_NULL(); } - /* If temporary, determine owning backend. */ - if (!relform->relistemp) - backend = InvalidBackendId; - else if (isTempOrToastNamespace(relform->relnamespace)) - backend = MyBackendId; - else + /* Determine owning backend. */ + switch (relform->relpersistence) { - /* Do it the hard way. */ - backend = GetTempNamespaceBackendId(relform->relnamespace); - Assert(backend != InvalidBackendId); + case RELPERSISTENCE_PERMANENT: + backend = InvalidBackendId; + break; + case RELPERSISTENCE_TEMP: + if (isTempOrToastNamespace(relform->relnamespace)) + backend = MyBackendId; + else + { + /* Do it the hard way. */ + backend = GetTempNamespaceBackendId(relform->relnamespace); + Assert(backend != InvalidBackendId); + } + break; + default: + elog(ERROR, "invalid relpersistence: %c", relform->relpersistence); + backend = InvalidBackendId; /* placate compiler */ + break; } ReleaseSysCache(tuple); -- cgit v1.2.3