mysql函数

1.mysql函数 通过父 往下查子，有几代查几代

代码：

BEGIN
    DECLARE sTemp VARCHAR(21845);
    DECLARE sTempChd VARCHAR(21845);
    SET sTemp = '';
    SET sTempChd =cast(rootId as CHAR);
    WHILE sTempChd is not null DO
        IF sTemp  != '' THEN
            SET sTemp = concat(sTemp,',',sTempChd);
        else
            SET sTemp  = sTempChd;
        END IF;
        set sTemp = concat(sTemp,',',sTempChd); 
        SELECT group_concat(v.id) INTO sTempChd FROM sys_area v where FIND_IN_SET(v.parentid,sTempChd)>0;
    END WHILE;
    RETURN sTemp; 
END

解释：

运行：

结果：
使用：

	
		select
		n.ORGANIZATIONID, n.ORGANIZATIONCODE, n.ORGANIZATIONNAME,
		n.PARENTID, n.STATUS
		from SYS_ORGANIZATION n where n.STATUS = 1
		
	        and FIND_IN_SET(n.organizationid, getOrganizationChildren(#{organizationid,jdbcType=DECIMAL}))
	    
		order by n.ORGANIZATIONID
	
	
	
		select
		
		from SYS_ORGANIZATION
		where STATUS = 1
		
	        and FIND_IN_SET(organizationid, getOrganizationChildren(#{organizationid,jdbcType=DECIMAL}))
	    
		order by ORGANIZATIONID
	
	
	
		select
		ORGANIZATIONID
		from SYS_ORGANIZATION
		where STATUS = 1
		
	        and FIND_IN_SET(organizationid, getOrganizationChildren(#{organizationid,jdbcType=DECIMAL}))
	    
		order by ORGANIZATIONID