diff options
Diffstat (limited to 'contrib/btree_gist/btree_cash.c')
| -rw-r--r-- | contrib/btree_gist/btree_cash.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_cash.c b/contrib/btree_gist/btree_cash.c index 51bdacab8eb..01c8d5a5f40 100644 --- a/contrib/btree_gist/btree_cash.c +++ b/contrib/btree_gist/btree_cash.c @@ -7,6 +7,7 @@ #include "btree_utils_num.h" #include "common/int.h" #include "utils/cash.h" +#include "utils/sortsupport.h" typedef struct { @@ -23,6 +24,7 @@ PG_FUNCTION_INFO_V1(gbt_cash_consistent); PG_FUNCTION_INFO_V1(gbt_cash_distance); PG_FUNCTION_INFO_V1(gbt_cash_penalty); PG_FUNCTION_INFO_V1(gbt_cash_same); +PG_FUNCTION_INFO_V1(gbt_cash_sortsupport); static bool gbt_cashgt(const void *a, const void *b, FmgrInfo *flinfo) @@ -210,3 +212,29 @@ gbt_cash_same(PG_FUNCTION_ARGS) *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo); PG_RETURN_POINTER(result); } + +static int +gbt_cash_ssup_cmp(Datum x, Datum y, SortSupport ssup) +{ + cashKEY *arg1 = (cashKEY *) DatumGetPointer(x); + cashKEY *arg2 = (cashKEY *) DatumGetPointer(y); + + /* for leaf items we expect lower == upper, so only compare lower */ + if (arg1->lower > arg2->lower) + return 1; + else if (arg1->lower < arg2->lower) + return -1; + else + return 0; +} + +Datum +gbt_cash_sortsupport(PG_FUNCTION_ARGS) +{ + SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0); + + ssup->comparator = gbt_cash_ssup_cmp; + ssup->ssup_extra = NULL; + + PG_RETURN_VOID(); +} |