Problem in derby: comparison operators are not supported on Clob object values.

If we try run select query look like

select * from t where a = b;
or
select * from t where a = 'some text';

where a, b - Clob value

[java] java.sql.SQLSyntaxErrorException: Comparisons between 'CLOB (UCS_BASIC)' and 'CLOB (UCS_BASIC)' are not supported. Types must be comparable. String types must also have matching collation. If collation does not match, a possible solution is to cast operands to force them to the default collation (e.g. SELECT tablename FROM sys.systables WHERE CAST(tablename AS VARCHAR(128)) = 'T1')
[java] at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
[java] at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
[java] at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
[java] at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
[java] at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
[java] at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)