Java 8 Time API - DB2/400 / JT400

Question

I'm currently upgrading an application that uses DB2/400 database, and I'm migrating to the new java time api (LocalDate, LocalTime, ...), using the latest version of jt400.jar.

However, when executing statement setObject as follows

stmt.setObject(++columns, LocalDate.now());

I'm getting this exception

Thread[main,5,main]  Ter jan 18 10:46:56:852 GMT 2022  as400: PreparedStatementImpl STMT0001 (1588970020) : setObject().
Thread[main,5,main]  Ter jan 18 10:46:56:852 GMT 2022  as400: PreparedStatementImpl STMT0001 (1588970020) : parameter index: 2 type: java.time.LocalDate toString():2022-01-18.
Thread[main,5,main]  Ter jan 18 10:46:56:853 GMT 2022  as400: Unknown com.ibm.as400.access.SQLDate@3c679bde (1013423070) : Unable to assign object(2022-01-18) of class(class java.time.LocalDate).
Thread[main,5,main]  Ter jan 18 10:46:56:853 GMT 2022  as400: Unknown com.ibm.as400.access.SQLDate@3c679bde (1013423070) : Throwing exception, sqlState: 07006 reason: Data type mismatch. vendor code -99999.java.sql.SQLException: Data type mismatch.
    at com.ibm.as400.access.JDError.createSQLExceptionSubClass(JDError.java:891)
    at com.ibm.as400.access.JDError.throwSQLException(JDError.java:436)
    at com.ibm.as400.access.SQLDate.set(SQLDate.java:452)
    at com.ibm.as400.access.AS400JDBCPreparedStatementImpl.setValue(AS400JDBCPreparedStatementImpl.java:3655)
    at com.ibm.as400.access.AS400JDBCPreparedStatementImpl.setObject(AS400JDBCPreparedStatementImpl.java:3124)
    at mypackage.jdbc.LocalDateTester.main(LocalDateTester.java:26)

Also, when trying to read from the DB using

rs.getObject(2, LocalDate.class)

I'm also getting the exception

Exception in thread "main" java.sql.SQLException: Data type not valid.
    at com.ibm.as400.access.JDError.createSQLExceptionSubClass(JDError.java:985)
    at com.ibm.as400.access.JDError.throwSQLException(JDError.java:436)
    at com.ibm.as400.access.JDError.throwSQLException(JDError.java:413)
    at com.ibm.as400.access.AS400JDBCResultSet.getObject(AS400JDBCResultSet.java:7457)
    at mypackage.jdbc.LocalDateTester.main(LocalDateTester.java:47)

The DB column type on iSeries is Date.

I'm I doing something wrong, or is the new java.time api not supported?

If so, does anyone know if there are any plans for Java Time API support?

Thanks in advance

Answer 1

You must use java.sql.date with JDBC. Convert with :

java.sql.Date.valueOf(LocalDate.now());