Vector tables=query.getFrom();
Enumeration e = tables.elements();
// from
while(e.hasMoreElements()) {
ZFromItem fromItem=(ZFromItem) e.nextElement();
tablesNames.add(fromItem.getFullName());
}
// where
ZExp where = query.getWhere();
if(where instanceof ZExpression) {
parseZExpression((ZExpression) where, tablesNames);