var.setVariableType(qs.getClassLoaderResolver().classForName(mapStore.getKeyType()));
}
String vtIdentifier = "UNBOUND" + '.' + var.getVariableName();
String mtIdentifier = idFactory.newIdentifier(idFactory.newIdentifier(te.getAlias(), fieldName), var.getVariableName()).getIdentifier();
DatastoreIdentifier mtRangeVar = idFactory.newIdentifier(IdentifierFactory.TABLE, mtIdentifier);
DatastoreIdentifier vtRangeVar = idFactory.newIdentifier(IdentifierFactory.TABLE, vtIdentifier);
QueryExpression qexpr = getBackingStoreQueryable().getExistsSubquery(qs, mapping, te, mtRangeVar);
var.bindTo(getBackingStoreQueryable().joinKeysTo(qexpr,
qs,