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.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/include/commands/tablespace.h b/src/include/commands/tablespace.h
index 327fbc6c4f9..1e3f6ca0c62 100644
--- a/src/include/commands/tablespace.h
+++ b/src/include/commands/tablespace.h
@@ -47,7 +47,7 @@ extern void AlterTableSpaceOptions(AlterTableSpaceOptionsStmt *stmt);
 
 extern void TablespaceCreateDbspace(Oid spcNode, Oid dbNode, bool isRedo);
 
-extern Oid	GetDefaultTablespace(bool forTemp);
+extern Oid	GetDefaultTablespace(char relpersistence);
 
 extern void PrepareTempTablespaces(void);