Reference to uninitialized collection
在使用构造函数初始化之前引用了集合（嵌套表或 VARRAY）。集合必须先初始化才能添加或访问元素。
SELECT type_name, typecode, attributes FROM dba_types WHERE owner = 'SCHEMA' AND typecode IN ('COLLECTION','TABLE','VARRAY');SELECT text FROM dba_source WHERE name = 'PROC_NAME' ORDER BY line;