e6fb6dd8cd
Migration 009: - Simplified uuid_generate_v7() to avoid integer overflow on bit shifts - Uses double precision for timestamp then converts to hex Seeder: - Changed roles from 'admin','company' to 'companyAdmin' - Matches users table CHECK constraint: superadmin, companyAdmin, recruiter, jobSeeker
50 lines
1.5 KiB
PL/PgSQL
50 lines
1.5 KiB
PL/PgSQL
-- Migration: Create UUID v7 generation function
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-- Description: PostgreSQL function to generate UUID v7 (time-ordered UUIDs)
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-- Uses gen_random_uuid() as base, then overrides first 6 bytes with timestamp
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-- Enable pgcrypto extension for gen_random_bytes()
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CREATE EXTENSION IF NOT EXISTS pgcrypto;
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-- Simple UUID v7 function that works with PostgreSQL's type system
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CREATE OR REPLACE FUNCTION uuid_generate_v7()
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RETURNS uuid AS $$
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DECLARE
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v_time double precision;
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v_secs bigint;
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v_msec int;
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v_random bytea;
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v_uuid bytea;
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v_timestamp bytea;
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BEGIN
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-- Get current time
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v_time := extract(epoch from clock_timestamp());
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v_secs := floor(v_time);
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v_msec := floor((v_time - v_secs) * 1000);
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-- Generate random bytes for the rest
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v_random := gen_random_bytes(10);
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-- Build timestamp bytes (6 bytes = 48 bits)
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v_timestamp := decode(lpad(to_hex(v_secs * 1000 + v_msec), 12, '0'), 'hex');
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-- Combine: timestamp (6 bytes) + random (10 bytes)
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v_uuid := v_timestamp || v_random;
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-- Set version 7 (0111) in byte 6 (bits 4-7)
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v_uuid := set_byte(v_uuid, 6, (get_byte(v_uuid, 6) & 15) | 112);
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-- Set variant RFC 4122 (10xx) in byte 8
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v_uuid := set_byte(v_uuid, 8, (get_byte(v_uuid, 8) & 63) | 128);
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RETURN encode(v_uuid, 'hex')::uuid;
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END;
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$$ LANGUAGE plpgsql VOLATILE;
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-- Comment
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COMMENT ON FUNCTION uuid_generate_v7() IS 'Generates a UUID v7 (time-ordered) - RFC 9562 compliant';
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-- Test the function
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DO $$
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BEGIN
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RAISE NOTICE 'UUID v7 test: %', uuid_generate_v7();
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END $$;
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