org.hibernate.exception.DataException due to column size error on database for CaseFileDataLog.itemValue on RHPAM

Issue

• It seems column size for CaseFileDataLog.itemValue is limited to only 255 bytes. There is a requirement to have more data, can we increase the column size? for e.g 1024

• Executing a Case fails with the following exception (using MS SQL Server):

2018-10-27 13:48:01,808 WARN  [org.jbpm.process.audit.VariableInstanceLog] (default task-10) Variable content was trimmed as it was too long (more than 255 characters)
2018-10-27 13:48:01,820 WARN  [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-10) SQL Error: 8152, SQLState: 22001
2018-10-27 13:48:01,820 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-10) String or binary data would be truncated.
2018-10-27 13:48:01,824 WARN  [org.jbpm.shared.services.impl.TransactionalCommandService] (default task-10) Could not commit session: javax.persistence.PersistenceException: org.hibernate.exception.DataException: could not execute statement
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1608)
        at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1152)
        at org.jbpm.shared.services.impl.JpaPersistenceContext.persist(JpaPersistenceContext.java:145)
        at org.jbpm.shared.services.impl.commands.PersistObjectCommand.execute(PersistObjectCommand.java:38)
        at org.jbpm.shared.services.impl.commands.PersistObjectCommand.execute(PersistObjectCommand.java:23)
        at org.jbpm.shared.services.impl.TransactionalCommandService.execute(TransactionalCommandService.java:76)
        at org.jbpm.casemgmt.impl.audit.CaseInstanceAuditEventListener.afterCaseStarted(CaseInstanceAuditEventListener.java:110)
        at org.jbpm.casemgmt.impl.event.CaseEventSupport.fireAfterCaseStarted(CaseEventSupport.java:78)
        at org.jbpm.casemgmt.impl.command.StartCaseCommand.execute(StartCaseCommand.java:163)
        at org.jbpm.casemgmt.impl.command.StartCaseCommand.execute(StartCaseCommand.java:53)
...
        at org.jbpm.kie.services.impl.ProcessServiceImpl.execute(ProcessServiceImpl.java:695)
        at org.jbpm.casemgmt.impl.CaseServiceImpl.startCase(CaseServiceImpl.java:187)

On Oracle, the exception looks like this:

Caused by: java.sql.SQLException: ORA-12899: value too large for column "JBPM"."CASEFILEDATALOG"."ITEMVALUE" (actual: 929, maximum: 255)

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:1059)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:522)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:257)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:587)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:225)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:53)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:943)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1150)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:4798)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:4875)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1361)
    at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeUpdate(WrappedPreparedStatement.java:537)
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
    ... 119 more