52 lines
1.0 KiB
SQL
52 lines
1.0 KiB
SQL
DELIMITER $$
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CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `vn2008`.`nest_delete`(
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vTable VARCHAR(45)
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,vNodeId INT
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)
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BEGIN
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DECLARE vMyRight INT;
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DECLARE vMyLeft INT;
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DECLARE vMyWidth INT;
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DROP TEMPORARY TABLE IF EXISTS aux;
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CREATE TEMPORARY TABLE aux
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SELECT 0 rgt, 0 lft, 0 wdt;
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SET vTable = util.quoteIdentifier(vTable);
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE aux a
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JOIN ', vTable, ' t
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SET a.rgt = t.rgt,
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a.lft = t.lft,
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a.wdt = t.rgt - t.lft + 1
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WHERE t.id = ?')
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USING vNodeId;
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SELECT rgt, lft, wdt
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INTO vMyRight, vMyLeft, vMyWidth
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FROM aux;
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DROP TEMPORARY TABLE aux;
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EXECUTE IMMEDIATE CONCAT(
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'DELETE FROM ', vTable,
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' WHERE lft BETWEEN ? AND ?')
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USING vMyLeft, vMyRight;
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE ', vTable,
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' SET rgt = rgt - ?
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WHERE rgt > ?
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ORDER BY rgt')
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USING vMyWidth,vMyRight;
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE ', vTable,
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' SET lft = lft - ?
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WHERE lft > ?
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ORDER BY lft')
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USING vMyWidth, vMyRight;
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END$$
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DELIMITER ;
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