← hierarchy-data-closure-table

Add a sp of delete node

a2e924efde76e3b5bad5c2c85569116233abf02b · developerworks · May 15, 2013 01:17

+30 −5 · 3 files changed

• sql/p_prefix_nodes_delete_nodes_after_update.sql +22 −0
• sql/p_prefix_nodes_move_old_paths_after_update.sql +1 −4
• sql/prefix_nodes_move_old_paths_after_update.sql +7 −1

diff --git a/sql/p_prefix_nodes_delete_nodes_after_update.sql b/sql/p_prefix_nodes_delete_nodes_after_update.sql
new file mode 100644
index 0000000..ce8350a
--- /dev/null
+++ b/sql/p_prefix_nodes_delete_nodes_after_update.sql
@@ -0,0 +1,22 @@
+DELIMITER $$
+
+USE `_category`$$
+
+DROP PROCEDURE IF EXISTS `p_prefix_nodes_delete_nodes_after_update`$$
+
+CREATE DEFINER = `root` @`localhost` PROCEDURE `p_prefix_nodes_delete_nodes_after_update` (
+    `node_id` INT UNSIGNED,
+    `deleted` INT UNSIGNED
+) COMMENT 'Delete a node and its descendant nodes(update is_deleted = 1)' 
+BEGIN
+    UPDATE 
+        `prefix_nodes` AS d 
+        JOIN `prefix_nodes_paths` AS p 
+            ON d.`id` = p.`descendant_id` 
+        JOIN `prefix_nodes_paths` AS crumbs 
+            ON crumbs.`descendant_id` = p.`descendant_id` SET d.`is_deleted` = deleted
+    WHERE p.`ancestor_id` = node_id;
+END $$
+
+DELIMITER ;
+
diff --git a/sql/p_prefix_nodes_move_old_paths_after_update.sql b/sql/p_prefix_nodes_move_old_paths_after_update.sql
index e333b9a..517ebe3 100644
--- a/sql/p_prefix_nodes_move_old_paths_after_update.sql
+++ b/sql/p_prefix_nodes_move_old_paths_after_update.sql
@@ -4,7 +4,7 @@ USE `_category`$$
 
 DROP PROCEDURE IF EXISTS `p_prefix_nodes_move_old_paths_after_update`$$
 
-CREATE DEFINER=`root`@`localhost` PROCEDURE `p_prefix_nodes_move_old_paths_after_update`(
+CREATE DEFINER = `root` @`localhost` PROCEDURE `p_prefix_nodes_move_old_paths_after_update` (
     `node_old_parent_id` INT UNSIGNED,
     `node_new_parent_id` INT UNSIGNED
 ) COMMENT 'Update paths when parent_id column changed'
@@ -15,8 +15,6 @@ BEGIN
     -- If parent_id has chanaged
     -- 1. Delete the paths between moved node and old ancestors
     -- 2. Add the paths between moved node and new ancestors
-    IF `node_old_parent_id` != `node_new_parent_id`
-    THEN
     DELETE
         a
     FROM
@@ -43,7 +41,6 @@ BEGIN
         JOIN `prefix_nodes_paths` AS subtree
     WHERE subtree.`ancestor_id` = `node_old_parent_id`
         AND supertree.`descendant_id` = `node_new_parent_id` ;
-    END IF ;
 END$$
 
 DELIMITER ;
diff --git a/sql/prefix_nodes_move_old_paths_after_update.sql b/sql/prefix_nodes_move_old_paths_after_update.sql
index c51e9a5..94621f9 100644
--- a/sql/prefix_nodes_move_old_paths_after_update.sql
+++ b/sql/prefix_nodes_move_old_paths_after_update.sql
@@ -8,7 +8,13 @@ CREATE
     /*!50017 DEFINER = 'root'@'localhost' */
     TRIGGER `prefix_nodes_move_old_paths_after_update` AFTER UPDATE ON `prefix_nodes` 
     FOR EACH ROW BEGIN
-    CALL p_prefix_nodes_move_old_paths_after_update(OLD.`parent_id`, NEW.`parent_id`);
+    IF OLD.`parent_id` != NEW.`parent_id` THEN
+        CALL p_prefix_nodes_move_old_paths_after_update(OLD.`parent_id`, NEW.`parent_id`);
+    END IF;
+
+    IF OLD.`is_deleted` != NEW.`is_deleted` THEN
+        CALL p_prefix_nodes_delete_nodes_after_update(NEW.`parent_id`);
+    END IF;
 END;
 $$