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Add n_live_tuples and n_dead_tuples to pg_stat_all_tables.

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The purpose is to allow autovacuum-esq conditional vacuuming and
clustering using SQL to discover the required stats.

No documentation updates required.  Catalog version updated.

Glen Parker
This commit is contained in:
Bruce Momjian
2007-01-02 20:59:32 +00:00
parent 7bb1cc50b2
commit 2955f1ebf4
5 changed files with 49 additions and 9 deletions
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36
src/backend/utils/adt/pgstatfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.35 2006/12/06 18:06:47 neilc Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.36 2007/01/02 20:59:31 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -28,6 +28,8 @@ extern Datum pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_tuples_updated(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_live_tuples(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_dead_tuples(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_blocks_hit(PG_FUNCTION_ARGS);
extern Datum pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS);
@ -152,6 +154,38 @@ pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
}
Datum
pg_stat_get_live_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_live_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_dead_tuples(PG_FUNCTION_ARGS)
{
Oid relid = PG_GETARG_OID(0);
int64 result;
PgStat_StatTabEntry *tabentry;
if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
result = 0;
else
result = (int64) (tabentry->n_dead_tuples);
PG_RETURN_INT64(result);
}
Datum
pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
{