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Document meaning of lossy column.

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This commit is contained in:
Bruce Momjian 2001-07-09 18:35:52 +00:00
parent bb0db45302
commit a48c3a3447
1 changed files with 5 additions and 3 deletions
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8
src/include/catalog/pg_index.h
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $Id: pg_index.h,v 1.20 2001/05/17 00:29:52 momjian Exp $ * $Id: pg_index.h,v 1.21 2001/07/09 18:35:52 momjian Exp $
* *
* NOTES * NOTES
* the genbki.sh script reads this file and generates .bki * the genbki.sh script reads this file and generates .bki
@ -49,8 +49,10 @@ CATALOG(pg_index)
int2vector indkey; int2vector indkey;
oidvector indclass; oidvector indclass;
bool indisclustered; /* unused */ bool indisclustered; /* unused */
bool indislossy; /* do we fetch false tuples (lossy bool indislossy; /* index hit must be reevaluated against heap
* compression)? */ * value to make sure it really is match;
* typically used by hash.
*/
bool indhaskeytype; /* not used, originally added by GIST */ bool indhaskeytype; /* not used, originally added by GIST */
bool indisunique; /* is this a unique index? */ bool indisunique; /* is this a unique index? */
bool indisprimary; /* is this index for primary key */ bool indisprimary; /* is this index for primary key */