/* We will simply create a scan operator for every relation in the query. */
void construct_scan_operators() {
scan_operators = new Vector<ScanOperator>();
for (BaseRelationSchema rs : query_relations) {
/* There may be predicates involving just that relation. */
Vector<Predicate> v = new Vector<Predicate>();
for (Predicate p : query_predicates) if (p.isScanPredicate(rs)) v.add(p);
scan_operators.add(new ScanOperator(rs, v));
}
}
