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Generate pg_stat_get*() functions for tables using macros
The same code pattern is repeated 17 times for int64 counters (0 for missing entry) and 5 times for timestamps (NULL for missing entry) on table entries. This code is switched to use a macro for the basic code instead, shaving a few hundred lines of originally-duplicated code. The function names remain the same, but some fields of PgStat_StatTabEntry have to be renamed to cope with the new style. Author: Bertrand Drouvot Reviewed-by: Nathan Bossart Discussion: https:/postgr.es/m/20221204173207.GA2669116@nathanxps13
This commit is contained in:
Michael Paquier
@ -36,363 +36,106 @@
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#define HAS_PGSTAT_PERMISSIONS(role) (has_privs_of_role(GetUserId(), ROLE_PG_READ_ALL_STATS) || has_privs_of_role(GetUserId(), role))
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Datum
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pg_stat_get_numscans(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->numscans);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_lastscan(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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TimestampTz result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->lastscan;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_returned);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_inserted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_updated);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_deleted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_hot_updated(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_hot_updated);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_live_tuples(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->n_live_tuples);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_dead_tuples(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->n_dead_tuples);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_mod_since_analyze(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->changes_since_analyze);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_ins_since_vacuum(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->inserts_since_vacuum);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->blocks_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->blocks_hit);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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TimestampTz result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->vacuum_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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TimestampTz result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->autovac_vacuum_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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TimestampTz result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->analyze_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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TimestampTz result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->autovac_analyze_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_vacuum_count(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->vacuum_count);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_autovacuum_count(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->autovac_vacuum_count);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_analyze_count(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->analyze_count);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_autoanalyze_count(PG_FUNCTION_ARGS)
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{
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Oid relid = PG_GETARG_OID(0);
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int64 result;
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PgStat_StatTabEntry *tabentry;
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->autovac_analyze_count);
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PG_RETURN_INT64(result);
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}
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#define PG_STAT_GET_RELENTRY_INT64(stat) \
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Datum \
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CppConcat(pg_stat_get_,stat)(PG_FUNCTION_ARGS) \
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{ \
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Oid relid = PG_GETARG_OID(0); \
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int64 result; \
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PgStat_StatTabEntry *tabentry; \
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\
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL) \
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result = 0; \
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else \
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result = (int64) (tabentry->stat); \
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\
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PG_RETURN_INT64(result); \
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} \
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/* pg_stat_get_analyze_count */
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PG_STAT_GET_RELENTRY_INT64(analyze_count);
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/* pg_stat_get_autoanalyze_count */
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PG_STAT_GET_RELENTRY_INT64(autoanalyze_count);
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/* pg_stat_get_autovacuum_count */
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PG_STAT_GET_RELENTRY_INT64(autovacuum_count);
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/* pg_stat_get_blocks_fetched */
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PG_STAT_GET_RELENTRY_INT64(blocks_fetched);
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/* pg_stat_get_blocks_hit */
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PG_STAT_GET_RELENTRY_INT64(blocks_hit);
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/* pg_stat_get_dead_tuples */
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PG_STAT_GET_RELENTRY_INT64(dead_tuples);
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/* pg_stat_get_ins_since_vacuum */
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PG_STAT_GET_RELENTRY_INT64(ins_since_vacuum);
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/* pg_stat_get_live_tuples */
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PG_STAT_GET_RELENTRY_INT64(live_tuples);
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/* pg_stat_get_mods_since_analyze */
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PG_STAT_GET_RELENTRY_INT64(mod_since_analyze);
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/* pg_stat_get_numscans */
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PG_STAT_GET_RELENTRY_INT64(numscans);
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/* pg_stat_get_tuples_deleted */
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PG_STAT_GET_RELENTRY_INT64(tuples_deleted);
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/* pg_stat_get_tuples_fetched */
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PG_STAT_GET_RELENTRY_INT64(tuples_fetched);
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/* pg_stat_get_tuples_hot_updated */
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PG_STAT_GET_RELENTRY_INT64(tuples_hot_updated);
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/* pg_stat_get_tuples_inserted */
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PG_STAT_GET_RELENTRY_INT64(tuples_inserted);
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/* pg_stat_get_tuples_returned */
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PG_STAT_GET_RELENTRY_INT64(tuples_returned);
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/* pg_stat_get_tuples_updated */
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PG_STAT_GET_RELENTRY_INT64(tuples_updated);
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/* pg_stat_get_vacuum_count */
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PG_STAT_GET_RELENTRY_INT64(vacuum_count);
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#define PG_STAT_GET_RELENTRY_TIMESTAMPTZ(stat) \
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Datum \
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CppConcat(pg_stat_get_,stat)(PG_FUNCTION_ARGS) \
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{ \
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Oid relid = PG_GETARG_OID(0); \
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TimestampTz result; \
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PgStat_StatTabEntry *tabentry; \
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\
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL) \
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result = 0; \
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else \
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result = tabentry->stat; \
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\
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if (result == 0) \
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PG_RETURN_NULL(); \
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else \
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PG_RETURN_TIMESTAMPTZ(result); \
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} \
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/* pg_stat_get_last_analyze_time */
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PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_analyze_time);
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/* pg_stat_get_last_autoanalyze_time */
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PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_autoanalyze_time);
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/* pg_stat_get_last_autovacuum_time */
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PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_autovacuum_time);
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/* pg_stat_get_last_vacuum_time */
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PG_STAT_GET_RELENTRY_TIMESTAMPTZ(last_vacuum_time);
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/* pg_stat_get_lastscan */
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PG_STAT_GET_RELENTRY_TIMESTAMPTZ(lastscan);
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Datum
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pg_stat_get_function_calls(PG_FUNCTION_ARGS)
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