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Generate pg_stat_get*() functions for tables using macros

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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
2022-12-06 10:46:35 +09:00
parent 941aa6a626
commit 83a1a1b566
5 changed files with 139 additions and 396 deletions
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src/backend/access/heap/README.HOT
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@@ -271,7 +271,7 @@ physical tuple by eliminating an intermediate heap-only tuple or
replacing a physical root tuple by a redirect pointer, a decrement in
the table's number of dead tuples is reported to pgstats, which may
postpone autovacuuming. Note that we do not count replacing a root tuple
by a DEAD line pointer as decrementing n_dead_tuples; we still want
by a DEAD line pointer as decrementing dead_tuples; we still want
autovacuum to run to clean up the index entries and DEAD item.
This area probably needs further work ...