25 lines
933 B
SQL
25 lines
933 B
SQL
DROP FUNCTION IF EXISTS mocha_uuid_v4;
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CREATE FUNCTION mocha_uuid_v4()
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RETURNS CHAR(32) NO SQL
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BEGIN
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-- Generate 8 2-byte strings that we will combine into a UUIDv4
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SET @h1 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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SET @h2 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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SET @h3 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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SET @h6 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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SET @h7 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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SET @h8 = LPAD(HEX(FLOOR(RAND() * 0xffff)), 4, '0');
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-- 4th section will start with a 4 indicating the version
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SET @h4 = CONCAT('4', LPAD(HEX(FLOOR(RAND() * 0x0fff)), 3, '0'));
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-- 5th section first half-byte can only be 8, 9 A or B
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SET @h5 = CONCAT(HEX(FLOOR(RAND() * 4 + 8)),
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LPAD(HEX(FLOOR(RAND() * 0x0fff)), 3, '0'));
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-- Build the complete UUID
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RETURN LOWER(CONCAT(
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@h1, @h2, @h3, @h4, @h5, @h6, @h7, @h8
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));
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END |