diff options
Diffstat (limited to 'contrib/btree_gist/btree_float8.c')
| -rw-r--r-- | contrib/btree_gist/btree_float8.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_float8.c b/contrib/btree_gist/btree_float8.c index 9fb9cf024bd..43e7cde2b69 100644 --- a/contrib/btree_gist/btree_float8.c +++ b/contrib/btree_gist/btree_float8.c @@ -6,6 +6,7 @@ #include "btree_gist.h" #include "btree_utils_num.h" #include "utils/float.h" +#include "utils/sortsupport.h" typedef struct float8key { @@ -22,6 +23,7 @@ PG_FUNCTION_INFO_V1(gbt_float8_consistent); PG_FUNCTION_INFO_V1(gbt_float8_distance); PG_FUNCTION_INFO_V1(gbt_float8_penalty); PG_FUNCTION_INFO_V1(gbt_float8_same); +PG_FUNCTION_INFO_V1(gbt_float8_sortsupport); static bool @@ -212,3 +214,24 @@ gbt_float8_same(PG_FUNCTION_ARGS) *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo); PG_RETURN_POINTER(result); } + +static int +gbt_float8_ssup_cmp(Datum x, Datum y, SortSupport ssup) +{ + float8KEY *arg1 = (float8KEY *) DatumGetPointer(x); + float8KEY *arg2 = (float8KEY *) DatumGetPointer(y); + + /* for leaf items we expect lower == upper, so only compare lower */ + return float8_cmp_internal(arg1->lower, arg2->lower); +} + +Datum +gbt_float8_sortsupport(PG_FUNCTION_ARGS) +{ + SortSupport ssup = (SortSupport) PG_GETARG_POINTER(0); + + ssup->comparator = gbt_float8_ssup_cmp; + ssup->ssup_extra = NULL; + + PG_RETURN_VOID(); +} |