19 lines
350 B
MySQL
19 lines
350 B
MySQL
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DELIMITER $$
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CREATE OR REPLACE DEFINER=`root`@`localhost` FUNCTION `vn`.`getNewItemId`()
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RETURNS int(11)
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NOT DETERMINISTIC
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READS SQL DATA
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BEGIN
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DECLARE newItemId INT;
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SELECT i1.id + 1 INTO newItemId
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FROM item i1
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LEFT JOIN item i2 ON i1.id + 1 = i2.id
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WHERE i2.id IS NULL
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ORDER BY i1.id
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LIMIT 1;
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RETURN newItemId;
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END$$
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DELIMITER ;
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