Case sensitive issue with group by

[Homer]

Hi,

I am sure it is me doing something wrong here in my parser/catalog 
reader setup but I am getting a validator issue around case sensitivity 
in group bys.

If I create a basic table like

   create table ex1 (t1 text);


and then insert a couple of values.

if I run the following group by query

   select t1, count(*) from ex1 group by t1;


All is fine

If i run this query

   select T1 from EX1;


All is fine and the case insensitive behavior works as expected

but if I run this query

   select t1, count(*) from ex1 group by T1;


I get an error from validator

   Validate failed :From line 1, column 8 to line 1, column 9:
   Expression 't1' is not being grouped


its probably worth noting that if I reverse the casing and run this query

   select T1, count(*) from ex1 group by t1;


All is fine, and the query works.

I have set all the parameters I can find appropriate in my parser (based 
on the csv example) for case insensitive matching

   @Override
      public RelDataTypeField field(RelDataType rowType, String alias) {
        return SqlValidatorUtil.lookupField(false, elideRecord, rowType,
                alias);
      }

      @Override
      public int fieldOrdinal(RelDataType rowType, String alias) {
        final RelDataTypeField field = field(rowType, alias);
        return field != null ? field.getIndex() : -1;
      }

      @Override
      public boolean matches(String string, String name) {
        return Util.matches(false, string, name);
      }

      @Override
      public int match(List<String> strings, String name) {
        return Util.findMatch(strings, name, false);
      }

      @Override
      public RelDataType createTypeFromProjection(final RelDataType type,
              final List<String> columnNameList) {
        return SqlValidatorUtil.createTypeFromProjection(type,
   columnNameList,
                typeFactory, false, elideRecord);
      }


Does anyone have an idea of what I am doing wrong here, it would appear 
the group by identifier matching is not respecting the case insensitive 
matching.

Any ideas greatly appreciated

Thanks