/** Marks all unassigned join predicates as well as exprs in aggInfo and sortInfo. */
@Override
public void materializeRequiredSlots(Analyzer analyzer) {
// Mark unassigned join predicates. Some predicates that must be evaluated by a join
// can also be safely evaluated below the join (picked up by getBoundPredicates()).
// Such predicates will be marked twice and that is ok.
List<Expr> unassigned = analyzer.getUnassignedConjuncts(getTableRefIds(), true);
List<Expr> unassignedJoinConjuncts = Lists.newArrayList();
for (Expr e : unassigned) {
if (analyzer.evalByJoin(e)) unassignedJoinConjuncts.add(e);
}
List<Expr> baseTblJoinConjuncts = Expr.cloneList(unassignedJoinConjuncts, baseTblSmap_);
materializeSlots(analyzer, baseTblJoinConjuncts);
if (sortInfo_ != null) {
// mark ordering exprs before marking agg exprs because the ordering exprs
// may contain agg exprs that are not referenced anywhere but the ORDER BY clause
List<Expr> resolvedExprs = Expr.cloneList(sortInfo_.getOrderingExprs(), baseTblSmap_);
materializeSlots(analyzer, resolvedExprs);
}
if (aggInfo_ != null) {
// mark all agg exprs needed for HAVING pred and binding predicates as materialized
// before calling AggregateInfo.materializeRequiredSlots(), otherwise they won't
// show up in AggregateInfo.getMaterializedAggregateExprs()
ArrayList<Expr> havingConjuncts = Lists.newArrayList();
if (havingPred_ != null) havingConjuncts.add(havingPred_);
// Ignore predicates bound to a group-by slot because those
// are already evaluated below this agg node (e.g., in a scan).
Set<SlotId> groupBySlots = Sets.newHashSet();
for (int i = 0; i < aggInfo_.getGroupingExprs().size(); ++i) {
groupBySlots.add(aggInfo_.getAggTupleDesc().getSlots().get(i).getId());
}
// Binding predicates are assigned to the final output tuple of the aggregation,
// which is the tuple of the 2nd phase agg for distinct aggs.
ArrayList<Expr> bindingPredicates =
analyzer.getBoundPredicates(aggInfo_.getOutputTupleId(), groupBySlots);
havingConjuncts.addAll(bindingPredicates);
havingConjuncts.addAll(
analyzer.getUnassignedConjuncts(aggInfo_.getOutputTupleId().asList(), false));
materializeSlots(analyzer, havingConjuncts);
aggInfo_.materializeRequiredSlots(analyzer, baseTblSmap_);
}
}
