Add support of bool, bpchar, name and uuid to btree_gin

Mostly for completeness, but I believe there are cases to use that in
multicolumn GIN indexes.

Bump btree_gin module version

Author: Matheus Oliveira
Reviewed by: Tomas Vondra
Discussion: https://www.postgresql.org/message-id/flat/CAJghg4LMJf6Z13fnZD-MBNiGxzd0cA2=F3TDjNkX3eQH58hktQ@mail.gmail.com

1 files changed, 30 insertions, 1 deletions

diff --git a/contrib/btree_gin/btree_gin.c b/contrib/btree_gin/btree_gin.c
index 2473f79ca1..a660681e58 100644
--- a/contrib/btree_gin/btree_gin.c
+++ b/contrib/btree_gin/btree_gin.c
@@ -14,6 +14,7 @@
 #include "utils/numeric.h"
 #include "utils/timestamp.h"
 #include "utils/varbit.h"
+#include "utils/uuid.h"
 
 PG_MODULE_MAGIC;
 
@@ -350,6 +351,8 @@ leftmostvalue_text(void)
 
 GIN_SUPPORT(text, true, leftmostvalue_text, bttextcmp)
 
+GIN_SUPPORT(bpchar, true, leftmostvalue_text, bpcharcmp)
+
 static Datum
 leftmostvalue_char(void)
 {
@@ -437,7 +440,6 @@ GIN_SUPPORT(numeric, true, leftmostvalue_numeric, gin_numeric_cmp)
  * routines it needs it, so we can't use DirectFunctionCall2.
  */
 
-
 #define ENUM_IS_LEFTMOST(x) ((x) == InvalidOid)
 
 PG_FUNCTION_INFO_V1(gin_enum_cmp);
@@ -477,3 +479,30 @@ leftmostvalue_enum(void)
 }
 
 GIN_SUPPORT(anyenum, false, leftmostvalue_enum, gin_enum_cmp)
+
+static Datum
+leftmostvalue_uuid(void)
+{
+	/* palloc0 will create the UUID with all zeroes: "00000000-0000-0000-0000-000000000000" */
+	pg_uuid_t	*retval = (pg_uuid_t *) palloc0(sizeof(pg_uuid_t));
+	return UUIDPGetDatum(retval);
+}
+
+GIN_SUPPORT(uuid, false, leftmostvalue_uuid, uuid_cmp)
+
+static Datum
+leftmostvalue_name(void)
+{
+	NameData* result = (NameData *) palloc0(NAMEDATALEN);
+	return NameGetDatum(result);
+}
+
+GIN_SUPPORT(name, false, leftmostvalue_name, btnamecmp)
+
+static Datum
+leftmostvalue_bool(void)
+{
+	return BoolGetDatum(false);
+}
+
+GIN_SUPPORT(bool, false, leftmostvalue_bool, btboolcmp)