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c0f27628d2
On reflection, the timestamp-advances test might fail if we're unlucky enough for the time_mid field to change between two calls, since uuid_cmp is just bytewise comparison and the field ordering has more significant fields later. Build some field extraction functions so we can do a more honest test of that. Also check that the version and reserved fields contain what they should.
58 lines
2.1 KiB
PL/PgSQL
58 lines
2.1 KiB
PL/PgSQL
CREATE EXTENSION "uuid-ossp";
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SELECT uuid_nil();
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SELECT uuid_ns_dns();
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SELECT uuid_ns_url();
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SELECT uuid_ns_oid();
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SELECT uuid_ns_x500();
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-- some quick and dirty field extraction functions
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-- this is actually timestamp concatenated with clock sequence, per RFC 4122
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CREATE FUNCTION uuid_timestamp_bits(uuid) RETURNS varbit AS
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$$ SELECT ('x' || substr($1::text, 15, 4) || substr($1::text, 10, 4) ||
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substr($1::text, 1, 8) || substr($1::text, 20, 4))::bit(80)
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& x'0FFFFFFFFFFFFFFF3FFF' $$
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LANGUAGE SQL STRICT IMMUTABLE;
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CREATE FUNCTION uuid_version_bits(uuid) RETURNS varbit AS
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$$ SELECT ('x' || substr($1::text, 15, 2))::bit(8) & '11110000' $$
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LANGUAGE SQL STRICT IMMUTABLE;
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CREATE FUNCTION uuid_reserved_bits(uuid) RETURNS varbit AS
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$$ SELECT ('x' || substr($1::text, 20, 2))::bit(8) & '11000000' $$
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LANGUAGE SQL STRICT IMMUTABLE;
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CREATE FUNCTION uuid_multicast_bits(uuid) RETURNS varbit AS
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$$ SELECT ('x' || substr($1::text, 25, 2))::bit(8) & '00000011' $$
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LANGUAGE SQL STRICT IMMUTABLE;
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CREATE FUNCTION uuid_node(uuid) RETURNS text AS
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$$ SELECT substr($1::text, 25) $$
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LANGUAGE SQL STRICT IMMUTABLE;
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SELECT uuid_version_bits(uuid_generate_v1()),
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uuid_reserved_bits(uuid_generate_v1()),
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uuid_multicast_bits(uuid_generate_v1());
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SELECT uuid_version_bits(uuid_generate_v1mc()),
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uuid_reserved_bits(uuid_generate_v1mc()),
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uuid_multicast_bits(uuid_generate_v1mc());
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-- timestamp+clock sequence should be monotonic increasing in v1
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SELECT uuid_timestamp_bits(uuid_generate_v1()) < uuid_timestamp_bits(uuid_generate_v1());
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SELECT uuid_timestamp_bits(uuid_generate_v1mc()) < uuid_timestamp_bits(uuid_generate_v1mc());
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-- node should be stable in v1, but not v1mc
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SELECT uuid_node(uuid_generate_v1()) = uuid_node(uuid_generate_v1());
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SELECT uuid_node(uuid_generate_v1()) <> uuid_node(uuid_generate_v1mc());
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SELECT uuid_node(uuid_generate_v1mc()) <> uuid_node(uuid_generate_v1mc());
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SELECT uuid_generate_v3(uuid_ns_dns(), 'www.widgets.com');
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SELECT uuid_generate_v5(uuid_ns_dns(), 'www.widgets.com');
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SELECT uuid_version_bits(uuid_generate_v4()),
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uuid_reserved_bits(uuid_generate_v4());
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SELECT uuid_generate_v4() <> uuid_generate_v4();
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