53 lines
1.1 KiB
MySQL
53 lines
1.1 KiB
MySQL
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DELIMITER $$
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CREATE OR REPLACE DEFINER=`root`@`localhost` PROCEDURE `vn`.`balanceNestTree_addChild`(
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vSelf INT,
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vName VARCHAR(45)
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)
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BEGIN
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/**
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* Agrega un nuevo nodo hijo a un nodo existente dentro de la estructura
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* de árbol de vn.balanceNestTree.
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*
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* @param vSelf Identificador del nodo
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* @param vName Nombre del nuevo nodo hijo
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*/
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DECLARE vTable VARCHAR(45) DEFAULT util.quoteIdentifier('balanceNestTree');
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DECLARE vLeft INT;
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CREATE OR REPLACE TEMPORARY TABLE tAux
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SELECT 0 lft;
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE tAux
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SET lft = (SELECT lft
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FROM ', vTable,
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' WHERE id = ?)')
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USING vSelf;
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SELECT lft INTO vLeft FROM tAux;
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE ', vTable, '
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SET rgt = rgt + 2
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WHERE rgt > ?
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ORDER BY rgt DESC')
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USING vLeft;
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EXECUTE IMMEDIATE CONCAT(
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'UPDATE ', vTable, '
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SET lft = lft + 2
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WHERE lft > ?
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ORDER BY lft DESC')
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USING vLeft;
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EXECUTE IMMEDIATE CONCAT(
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'INSERT INTO ', vTable, ' (name, lft, rgt)
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VALUES(?, ? + 1, ? + 2)')
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USING vName,
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vLeft,
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vLeft;
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DROP TEMPORARY TABLE tAux;
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END$$
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DELIMITER ;
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