update using iterate, a collection, and a SQL IN clause

[Collin Peters <ca...@gmail.com>]

Hi all,

I am wondering if it is possible to construct a SQL update using an
iterate tag inside an update tag, and sending a collection (i.e. a
java.util.List) as a parameter

I have tried this and it seems to work (I can't get log4j to work in
ibatis so I can't see the SQL it is running, but the flag column does
get updated)
	<update id="clearFlaggedUsers" parameterClass="List">
		UPDATE	users SET
			flag = false
		WHERE	
		<iterate property="" conjunction=",">
			user_id IN (#[]#)
		</iterate>
	</update


So now I am trying to figure out the syntax for sending in a List of
objects, instead of a list of Integers.

	<update id="clearFlaggedUsers" parameterClass="userVO">
		UPDATE	users SET
			flag = false
		WHERE	
		<iterate property="?????" conjunction=",">
			user_id IN (#????[].user_id#)
		</iterate>
	</update

Am I on the right track?  What do I put in for the question marks?

To ask this another way...  If I have a java.util.List of UserVO
(pojos), and the UserVO has a variable 'user_id', and in the end I
want the following SQL to run:
"UPDATE users SET flag = false WHERE user_id IN (1,2,3)".  So in this
example I would have a list of 3 UserVO's, the user_ids in the 3 VOs
would be 1,2, and 3.  I want to run one update statement, not three.

How do I do that?

Re: update using iterate, a collection, and a SQL IN clause

[Jeff Butler <je...@gmail.com>]

Assuming there's a getUser_id() method...

<update id="clearFlaggedUsers" parameterClass="userVO">
  UPDATE  users SET flag = false
  <iterate prepend="where" property="user_id" open="user_id in("
conjunction="," close=")">
     #user_id[]#
  </iterate>
</update

Jeff Butler


On 3/13/07, Collin Peters <ca...@gmail.com> wrote:
>
> Hi all,
>
> I am wondering if it is possible to construct a SQL update using an
> iterate tag inside an update tag, and sending a collection (i.e. a
> java.util.List) as a parameter
>
> I have tried this and it seems to work (I can't get log4j to work in
> ibatis so I can't see the SQL it is running, but the flag column does
> get updated)
>        <update id="clearFlaggedUsers" parameterClass="List">
>                UPDATE  users SET
>                        flag = false
>                WHERE
>                <iterate property="" conjunction=",">
>                        user_id IN (#[]#)
>                </iterate>
>        </update
>
>
> So now I am trying to figure out the syntax for sending in a List of
> objects, instead of a list of Integers.
>
>        <update id="clearFlaggedUsers" parameterClass="userVO">
>                UPDATE  users SET
>                        flag = false
>                WHERE
>                <iterate property="?????" conjunction=",">
>                        user_id IN (#????[].user_id#)
>                </iterate>
>        </update
>
> Am I on the right track?  What do I put in for the question marks?
>
> To ask this another way...  If I have a java.util.List of UserVO
> (pojos), and the UserVO has a variable 'user_id', and in the end I
> want the following SQL to run:
> "UPDATE users SET flag = false WHERE user_id IN (1,2,3)".  So in this
> example I would have a list of 3 UserVO's, the user_ids in the 3 VOs
> would be 1,2, and 3.  I want to run one update statement, not three.
>
> How do I do that?
>