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Generalize concept of temporary relations to "relation persistence".

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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.
This commit is contained in:
Robert Haas
2010-12-13 12:34:26 -05:00
parent 0c90442355
commit 5f7b58fad8
48 changed files with 334 additions and 230 deletions
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6
src/backend/access/nbtree/nbtinsert.c
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@ -766,7 +766,7 @@ _bt_insertonpg(Relation rel,
}
/* XLOG stuff */
if (!rel->rd_istemp)
if (RelationNeedsWAL(rel))
{
xl_btree_insert xlrec;
BlockNumber xldownlink;
@ -1165,7 +1165,7 @@ _bt_split(Relation rel, Buffer buf, OffsetNumber firstright,
}
/* XLOG stuff */
if (!rel->rd_istemp)
if (RelationNeedsWAL(rel))
{
xl_btree_split xlrec;
uint8 xlinfo;
@ -1914,7 +1914,7 @@ _bt_newroot(Relation rel, Buffer lbuf, Buffer rbuf)
MarkBufferDirty(metabuf);
/* XLOG stuff */
if (!rel->rd_istemp)
if (RelationNeedsWAL(rel))
{
xl_btree_newroot xlrec;
XLogRecPtr recptr;