Jay Brown
44 lines
1.0 KiB
PL/PgSQL
44 lines
1.0 KiB
PL/PgSQL
-- Migration 001: Extensions and Core Functions
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-- Creates PostgreSQL extensions and utility functions used throughout the schema
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CREATE EXTENSION IF NOT EXISTS "pgcrypto";
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-- UUID v7 generator function (time-ordered UUIDs)
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CREATE OR REPLACE FUNCTION uuid_generate_v7()
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RETURNS uuid
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AS $$
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SELECT encode(
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set_bit(
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set_bit(
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overlay(uuid_send(gen_random_uuid())
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placing substring(int8send(floor(extract(epoch from clock_timestamp()) * 1000)::bigint) from 3)
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from 1 for 6
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),
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52, 1
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),
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53, 1
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),
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'hex')::uuid;
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$$
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LANGUAGE SQL
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VOLATILE;
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-- Version checking function for temporal data patterns
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CREATE FUNCTION isInVersion(
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_version int,
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_addedVersion int,
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_removedVersion int
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)
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RETURNS boolean AS $$
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BEGIN
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RETURN _version IS NULL OR (
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_version >= _addedVersion AND
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(_removedVersion IS NULL OR _version < _removedVersion)
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);
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END;
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$$ LANGUAGE plpgsql;
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-- Domain for unsigned small integers
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CREATE DOMAIN unsignedsmallint AS SMALLINT
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CHECK (VALUE >= 0);
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