Mybatis TypeHandler to convert Integer to String - sql

Question

I’m using Mybatis ORM with Vertica DB. I have an object like below, which I can’t modify
Class Employee{
Integer empId;
Integer deptId;
Integer salary;
//get and set methods for above
}
And code for TypeHandler is like below
public class IntegerToStringTypeHandler extends BaseTypeHandler<Integer> {
#Override
public void setNonNullParameter(PreparedStatement preparedStatement, int i, Integer integer, JdbcType jdbcType) throws SQLException {
System.out.println("i "+i +" integer "+ integer + " "+integer );
preparedStatement.setString(i,integer.toString());
}
#Override
public Integer getNullableResult(ResultSet resultSet, String columnName) throws SQLException {
return Integer.valueOf(resultSet.getString(columnName));
}
#Override
public Integer getNullableResult(ResultSet resultSet, int i) throws SQLException {
return Integer.valueOf(resultSet.getString(i));
}
#Override
public Integer getNullableResult(CallableStatement callableStatement, int i) throws SQLException {
return Integer.valueOf(callableStatement.getString(i));
}
}
And then table is like below
Desc Employee
Columns. Type
empId Integer
deptId Varchar(10)
Salary Integer
I have mybatis query like below
<select id=“getCount” parameter=“employee”>
Select count(1) from Employee
Where empid = #{employee.empid}
AND. deptId = #{employee. deptId,typeHandler=com.convert.type.IntegerToStringTypeHandler}
AND salary= #{employee.salary}
</select>
But it doesn’t work it fails with the following exception
Caused by: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='__frch_employee_0.deptid’, mode=IN, javaType=class java.lang.Integer, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #3 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.sql.SQLException: [Vertica][JDBC](10940) Invalid parameter index: 3.
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:89) ~[mybatis-3.4.5.jar:3.4.5]
Caused by: org.apache.ibatis.type.TypeException: Error setting non null for parameter #3 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.sql.SQLException: [Vertica][JDBC](10940) Invalid parameter index: 3.
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:55) ~[mybatis-3.4.5.jar:3.4.5]
Caused by: java.sql.SQLException: [Vertica][JDBC](10940) Invalid parameter index: 3.
at com.vertica.exceptions.ExceptionConverter.toSQLException(Unknown Source) ~[vertica-jdbc-8.1.1-7.jar:?]
at com.vertica.jdbc.common.SPreparedStatement.checkValidParameterIndex(Unknown Source) ~[vertica-jdbc-8.1.1-7.jar:?]
at com.vertica.jdbc.common.SPreparedStatement.setString(Unknown Source) ~[vertica-jdbc-8.1.1-7.jar:?]
at com.convert.type.IntegerToStringTypeHandler.setNonNullParameter(IntegerToStringTypeHandler.java:16) ~[classes/:?]
at com.convert.type.IntegerToStringTypeHandler.setNonNullParameter(IntegerToStringTypeHandler.java:11) ~[classes/:?]
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:53) ~[mybatis-3.4.5.jar:3.4.5]
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:87) ~[mybatis-3.4.5.jar:3.4.5]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:93) ~[mybatis-3.4.5.jar:3.4.5]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:64) ~[mybatis-3.4.5.jar:3.4.5]
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:86) ~[mybatis-3.4.5.jar:3.4.5]
I have spent a lot of time. Could someone please let know what I am missing?
the main problem is in this line
#{employee. deptId,typeHandler=com.convert.type.IntegerToStringTypeHandler}
Thanks

Answer 1

The code here is cannot be the one that is actually executed, I guess you have rewrote the code in the post because:
- quoting characters “ / ”are not supported by the XML parser
there is an unexpected dot . after the first AND that likely end up to SQL syntax exception
the select does specify neither a Result Type nor a Result Map.
So please copy/paste the code actually executed, that will allow giving more accurate answer. your TypeHandler is working fine.