String columnName = filter.getString("columnName");
String value = filter.getString("value");
int fieldIndex = query.getSelectFieldIndex(columnName);
String[] f = (String[])selectFields.get(fieldIndex);
transformer.addFilter(f[1]!=null? f[1]:f[0], value);
}
sqlQuery = (String)transformer.transformQuery(sqlQuery);
// put the query into session