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Add comment noting that hashm_procid in a hash index's metapage isn't

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actually used for anything.
This commit is contained in:
Tom Lane 2007-01-29 23:22:59 +00:00
parent c120dd263b
commit e8cd6f14a2
1 changed files with 6 additions and 1 deletions
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7
src/backend/access/hash/hashpage.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/hash/hashpage.c,v 1.63 2007/01/05 22:19:22 momjian Exp $ * $PostgreSQL: pgsql/src/backend/access/hash/hashpage.c,v 1.64 2007/01/29 23:22:59 tgl Exp $
* *
* NOTES * NOTES
* Postgres hash pages look like ordinary relation pages. The opaque * Postgres hash pages look like ordinary relation pages. The opaque
@ -275,6 +275,11 @@ _hash_metapinit(Relation rel)
metap->hashm_bmshift = i + BYTE_TO_BIT; metap->hashm_bmshift = i + BYTE_TO_BIT;
Assert((1 << BMPG_SHIFT(metap)) == (BMPG_MASK(metap) + 1)); Assert((1 << BMPG_SHIFT(metap)) == (BMPG_MASK(metap) + 1));
/*
* Label the index with its primary hash support function's OID. This is
* pretty useless for normal operation (in fact, hashm_procid is not used
* anywhere), but it might be handy for forensic purposes so we keep it.
*/
metap->hashm_procid = index_getprocid(rel, 1, HASHPROC); metap->hashm_procid = index_getprocid(rel, 1, HASHPROC);
/* /*