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Several fixes for hash indexes that involve changing the on-disk index

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layout; therefore, this change forces REINDEX of hash indexes (though
not a full initdb).  Widen hashm_ntuples to double so that hash space
management doesn't get confused by more than 4G entries; enlarge the
allowed number of free-space-bitmap pages; replace the useless bshift
field with a useful bmshift field; eliminate 4 bytes of wasted space
in the per-page special area.
This commit is contained in:
Tom Lane
2003-09-02 18:13:32 +00:00
parent 8b2450c831
commit d70610c4ee
7 changed files with 130 additions and 151 deletions
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29
src/backend/access/hash/hashutil.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashutil.c,v 1.34 2003/09/02 02:18:38 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashutil.c,v 1.35 2003/09/02 18:13:31 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -143,10 +143,33 @@ _hash_log2(uint32 num)
* _hash_checkpage -- sanity checks on the format of all hash pages
*/
void
_hash_checkpage(Page page, int flags)
_hash_checkpage(Relation rel, Page page, int flags)
{
#ifdef USE_ASSERT_CHECKING
Assert(page);
/*
* When checking the metapage, always verify magic number and version.
*/
if (flags == LH_META_PAGE)
{
HashMetaPage metap = (HashMetaPage) page;
if (metap->hashm_magic != HASH_MAGIC)
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("index \"%s\" is not a hash index",
RelationGetRelationName(rel))));
if (metap->hashm_version != HASH_VERSION)
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("index \"%s\" has wrong hash version, please REINDEX it",
RelationGetRelationName(rel))));
}
/*
* These other checks are for debugging purposes only.
*/
#ifdef USE_ASSERT_CHECKING
Assert(((PageHeader) (page))->pd_lower >= SizeOfPageHeaderData);
Assert(((PageHeader) (page))->pd_upper <=
(BLCKSZ - MAXALIGN(sizeof(HashPageOpaqueData))));