Please fix so SqlOperatorTests.testSelect (this test didn't use to do anything since the operator was not registered explictly as being supported by the fennel or java calc) runs under FarragoAutoVmOperatorTest.

Sample error:
java.lang.RuntimeException: net.sf.farrago.jdbc.FarragoJdbcUtil$FarragoSqlException: java.lang.AssertionError: Internal error: Conversion to relational algebra failed to preserve datatypes:
validated type:
RecordType(RecordType(INTEGER NOT NULL EXPR$0, INTEGER EXPR$1) NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(INTEGER NOT NULL EXPR$0) NOT NULL
rel:
ProjectRel(EXPR$0=[$0])
  ProjectRel(EXPR$0=[$1])
    ProjectRel(EXPR$0=[$0], EXPR$1=[$1])
      JoinRel(condition=[true], joinType=[inner])
        ProjectRel(EXPR$0=[$0])
          ProjectRel(EXPR$0=[2])
            OneRowRel
        ProjectRel(EXPR$0=[$0])
          ProjectRel(EXPR$0=[$0])
            ProjectRel(EXPR$0=[1])
              OneRowRel

at org.eigenbase.util.Util.newInternal(Util.java:785)
at org.eigenbase.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:233)
at org.eigenbase.oj.stmt.OJPreparingStmt.prepareSql(OJPreparingStmt.java:257)
at net.sf.farrago.query.FarragoPreparingStmt.prepare(FarragoPreparingStmt.java:270)
at net.sf.farrago.db.FarragoDatabase$2.initializeEntry(FarragoDatabase.java:824)
at net.sf.farrago.util.FarragoObjectCache.pin(FarragoObjectCache.java:153)
at net.sf.farrago.db.FarragoDatabase.prepareStmtImpl(FarragoDatabase.java:836)
at net.sf.farrago.db.FarragoDatabase.prepareStmt(FarragoDatabase.java:707)
at net.sf.farrago.db.FarragoDbSession.prepareImpl(FarragoDbSession.java:935)
at net.sf.farrago.db.FarragoDbSession.prepare(FarragoDbSession.java:862)
at net.sf.farrago.db.FarragoDbStmtContext.prepare(FarragoDbStmtContext.java:105)
at net.sf.farrago.jdbc.engine.FarragoJdbcEngineStatement.executeQuery(FarragoJdbcEngineStatement.java:167)
at net.sf.farrago.test.FarragoSqlOperatorsSuite$FarragoSqlTester.checkType(FarragoSqlOperatorsSuite.java:331)
at net.sf.farrago.test.FarragoSqlOperatorsSuite$FarragoSqlTester.checkType(FarragoSqlOperatorsSuite.java:156)
at org.eigenbase.sql.test.SqlOperatorTests.testSelect(SqlOperatorTests.java:1131)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at com.intellij.rt.execution.junit2.JUnitStarter.main(JUnitStarter.java:31)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
Caused by: net.sf.farrago.jdbc.FarragoJdbcUtil$FarragoSqlException: java.lang.AssertionError: Internal error: Conversion to relational algebra failed to preserve datatypes:
validated type:
RecordType(RecordType(INTEGER NOT NULL EXPR$0, INTEGER EXPR$1) NOT NULL EXPR$0) NOT NULL
converted type:
RecordType(INTEGER NOT NULL EXPR$0) NOT NULL
rel:
ProjectRel(EXPR$0=[$0])
  ProjectRel(EXPR$0=[$1])
    ProjectRel(EXPR$0=[$0], EXPR$1=[$1])
      JoinRel(condition=[true], joinType=[inner])
        ProjectRel(EXPR$0=[$0])
          ProjectRel(EXPR$0=[2])
            OneRowRel
        ProjectRel(EXPR$0=[$0])
          ProjectRel(EXPR$0=[$0])
            ProjectRel(EXPR$0=[1])
              OneRowRel

... 38 more