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Add sortsupport for gist_btree opclasses, for faster index builds.

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Commit 16fa9b2b30 introduced a faster way to build GiST indexes, by
sorting all the data. This commit adds the sortsupport functions needed
to make use of that feature for btree_gist.

Author: Andrey Borodin
Discussion: https://www.postgresql.org/message-id/2F3F7265-0D22-44DB-AD71-8554C743D943@yandex-team.ru
This commit is contained in:
Heikki Linnakangas
2021-04-07 13:22:05 +03:00
parent dd13ad9d39
commit 9f984ba6d2
77 changed files with 1530 additions and 3 deletions
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27
contrib/btree_gist/btree_ts.c
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@ -31,6 +31,7 @@ PG_FUNCTION_INFO_V1(gbt_tstz_consistent);
PG_FUNCTION_INFO_V1(gbt_tstz_distance);
PG_FUNCTION_INFO_V1(gbt_ts_penalty);
PG_FUNCTION_INFO_V1(gbt_ts_same);
PG_FUNCTION_INFO_V1(gbt_ts_sortsupport);
#ifdef USE_FLOAT8_BYVAL
@ -399,3 +400,29 @@ gbt_ts_same(PG_FUNCTION_ARGS)
*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
PG_RETURN_POINTER(result);
}
static int
gbt_ts_sort_build_cmp(Datum a, Datum b, SortSupport ssup)
{
tsKEY *ia = (tsKEY *) DatumGetPointer(a);
tsKEY *ib = (tsKEY *) DatumGetPointer(b);
return DatumGetInt32(DirectFunctionCall2(timestamp_cmp,
TimestampGetDatumFast(ia->lower),
TimestampGetDatumFast(ib->lower)));
}
/*
* Sort support routine for fast GiST index build by sorting.
*/
Datum
gbt_ts_sortsupport(PG_FUNCTION_ARGS)
{
SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0);
ssup->comparator = gbt_ts_sort_build_cmp;
ssup->abbrev_converter = NULL;
ssup->abbrev_abort = NULL;
ssup->abbrev_full_comparator = NULL;
PG_RETURN_VOID();
}