1 files changed, 75 insertions, 0 deletions
diff --git a/contrib/uuid-ossp/sql/uuid_ossp.sql b/contrib/uuid-ossp/sql/uuid_ossp.sql
new file mode 100644
index 0000000..b4237df
--- /dev/null
+++ b/contrib/uuid-ossp/sql/uuid_ossp.sql
@@ -0,0 +1,75 @@
+CREATE EXTENSION "uuid-ossp";
+
+SELECT uuid_nil();
+SELECT uuid_ns_dns();
+SELECT uuid_ns_url();
+SELECT uuid_ns_oid();
+SELECT uuid_ns_x500();
+
+-- some quick and dirty field extraction functions
+
+-- this is actually timestamp concatenated with clock sequence, per RFC 4122
+CREATE FUNCTION uuid_timestamp_bits(uuid) RETURNS varbit AS
+$$ SELECT ('x' || substr($1::text, 15, 4) || substr($1::text, 10, 4) ||
+           substr($1::text, 1, 8) || substr($1::text, 20, 4))::bit(80)
+          & x'0FFFFFFFFFFFFFFF3FFF' $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+CREATE FUNCTION uuid_version_bits(uuid) RETURNS varbit AS
+$$ SELECT ('x' || substr($1::text, 15, 2))::bit(8) & '11110000' $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+CREATE FUNCTION uuid_reserved_bits(uuid) RETURNS varbit AS
+$$ SELECT ('x' || substr($1::text, 20, 2))::bit(8) & '11000000' $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+CREATE FUNCTION uuid_multicast_bit(uuid) RETURNS bool AS
+$$ SELECT (('x' || substr($1::text, 25, 2))::bit(8) & '00000001') != '00000000' $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+CREATE FUNCTION uuid_local_admin_bit(uuid) RETURNS bool AS
+$$ SELECT (('x' || substr($1::text, 25, 2))::bit(8) & '00000010') != '00000000' $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+CREATE FUNCTION uuid_node(uuid) RETURNS text AS
+$$ SELECT substr($1::text, 25) $$
+LANGUAGE SQL STRICT IMMUTABLE;
+
+-- Ideally, the multicast bit would never be set in V1 output, but the
+-- UUID library may fall back to MC if it can't get the system MAC address.
+-- Also, the local-admin bit might be set (if so, we're probably inside a VM).
+-- So we can't test either bit here.
+SELECT uuid_version_bits(uuid_generate_v1()),
+       uuid_reserved_bits(uuid_generate_v1());
+
+-- Although RFC 4122 only requires the multicast bit to be set in V1MC style
+-- UUIDs, our implementation always sets the local-admin bit as well.
+SELECT uuid_version_bits(uuid_generate_v1mc()),
+       uuid_reserved_bits(uuid_generate_v1mc()),
+       uuid_multicast_bit(uuid_generate_v1mc()),
+       uuid_local_admin_bit(uuid_generate_v1mc());
+
+-- timestamp+clock sequence should be monotonic increasing in v1
+SELECT uuid_timestamp_bits(uuid_generate_v1()) < uuid_timestamp_bits(uuid_generate_v1());
+SELECT uuid_timestamp_bits(uuid_generate_v1mc()) < uuid_timestamp_bits(uuid_generate_v1mc());
+
+-- Ideally, the node value is stable in V1 addresses, but OSSP UUID
+-- falls back to V1MC behavior if it can't get the system MAC address.
+SELECT CASE WHEN uuid_multicast_bit(uuid_generate_v1()) AND
+                 uuid_local_admin_bit(uuid_generate_v1()) THEN
+         true -- punt, no test
+       ELSE
+         uuid_node(uuid_generate_v1()) = uuid_node(uuid_generate_v1())
+       END;
+
+-- In any case, V1MC node addresses should be random.
+SELECT uuid_node(uuid_generate_v1()) <> uuid_node(uuid_generate_v1mc());
+SELECT uuid_node(uuid_generate_v1mc()) <> uuid_node(uuid_generate_v1mc());
+
+SELECT uuid_generate_v3(uuid_ns_dns(), 'www.widgets.com');
+SELECT uuid_generate_v5(uuid_ns_dns(), 'www.widgets.com');
+
+SELECT uuid_version_bits(uuid_generate_v4()),
+       uuid_reserved_bits(uuid_generate_v4());
+
+SELECT uuid_generate_v4() <> uuid_generate_v4();