oracle 过程 调用本身

我们在删除父节点时需要删除子节点，子节点的子节点也要删除，这样就需要循环调用该函数，直到没有子节点的时候。

如下打印出某一节点下的所有子节点

表结构就是一个树形结构的传统结构。

CREATE OR REPLACE

PROCEDURE "DeleteNode" (deleteNodeID IN VARCHAR2)

AS

CURSOR children_cursor IS

SELECT "NodeID" FROM "Organize" WHERE "ParentID" = deleteNodeID;

BEGIN

FOR childIDs IN children_cursor LOOP

--调用本身

declare

BEGIN

SYS."DeleteNode"(childIDs."NodeID");

END;

--调用本身

DBMS_OUTPUT.PUT_LINE(childIDs."NodeID");

delete FROM "Organize" WHERE "NodeID"=childIDs."NodeID";

delete FROM "Node" WHERE "ID"=childIDs."NodeID";

END LOOP;

delete FROM "Organize" WHERE "NodeID"=deleteNodeID;

delete FROM "Node" WHERE "ID"=deleteNodeID;

END;