动态参数化查询与like

Question

Normal赋值运算符工作正常，但是在存储过程中操作不能使用下面的查询，你能纠正查询的错误吗？

在仅更改为LIKE运算符时，基于查询的过程会引发异常

AND APP_FRAMES.APP_EXT_CODE =:IN_APP_EXT_CODE%;      -- working

AND APP_FRAMES.APP_EXT_CODE LIKE %:IN_APP_EXT_CODE%; -- not working

工作代码：

QUERY_STR := 'select * from APP_FRAME_PROPERTIES,APP_FRAMES
Where APP_FRAME_PROPERTIES.APP_EXT_CODE = APP_FRAMES.APP_EXT_CODE
AND APP_FRAMES.APP_EXT_CODE =:IN_APP_EXT_CODE';

OPEN OUT_RESULT FOR QUERY_STR USING IN_APP_EXT_CODE;

Answer 1

您必须连接'%'文字：

AND APP_FRAMES.APP_EXT_CODE LIKE '%' || :IN_APP_EXT_CODE || '%'; 

整个查询将是：

QUERY_STR := 'select * from APP_FRAME_PROPERTIES,APP_FRAMES
Where APP_FRAME_PROPERTIES.APP_EXT_CODE = APP_FRAMES.APP_EXT_CODE
AND APP_FRAMES.APP_EXT_CODE LIKE ''%'' || :IN_APP_EXT_CODE || ''%'' ';