There is a query in my Mybatis containing an IN clause which is basically a set of Id's ( Integers)
I am now stuck on how can I pass an Integer array to this IN clause so that it pulls up the proper records.Tried by passing a String containing the ID's to the IN clause , but this did not work as expected.
Code Sample below
Mybatis Method using Annotations
@Select(SEL_QUERY) @Results(value = {@Result(property="id",column="ID")}) List<Integer> getIds(@Param("usrIds") Integer[] usrIds);
Query
select distinct ID from table a where a.id in ( #{usrIds} )
Method Call
Integer[] arr = new Integer[2]; arr[0] = 1; arr[1] = 2; mapper.getIds(arr)
This is not working , Mybatis throws an error when I call the mapper method
Any suggestions please
MyBatis does four main things: It executes SQL safely and abstracts away all the intricacies of JDBC. It maps parameter objects to JDBC prepared statement parameters. It maps rows in JDBC result sets to objects.
The resultMap element is the most important and powerful element in MyBatis. It's what allows you to do away with 90% of the code that JDBC requires to retrieve data from ResultSet s, and in some cases allows you to do things that JDBC does not even support.
typeHandlers. Whenever MyBatis sets a parameter on a PreparedStatement or retrieves a value from a ResultSet, a TypeHandler is used to retrieve the value in a means appropriate to the Java type.
MyBatis provides various attributes for insert mapper, but largely we use id and parameter type. id is unique identifier used to identify the insert statement. On the other hand, parametertype is the class name or the alias of the parameter that will be passed into the statement.
The myBatis User Guide on Dynamic SQL has an example on how to use a foreach loop to build the query string, which works for lists and arrays.
Prior to release 3.2 you had to use xml configuration to use dynamic sql, with newer versions it should also be possible to use dynamic sql in annotations.
<select id="selectPostIn" resultType="domain.blog.Post"> SELECT * FROM POST P WHERE ID in <foreach item="item" index="index" collection="list" open="(" separator="," close=")"> #{item} </foreach> </select>
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