@Override
public PlanNode visitIndexJoin(IndexJoinNode node, RewriteContext<Context> context) {
// Lookup symbols can only be passed through the probe side of an index join
Set<Symbol> probeLookupSymbols =
context
.get()
.getLookupSymbols()
.stream()
.filter(node.getProbeSource().getOutputSymbols()::contains)
.collect(toImmutableSet());
if (probeLookupSymbols.isEmpty()) {
return node;
}
PlanNode rewrittenProbeSource =
context.rewrite(
node.getProbeSource(), new Context(probeLookupSymbols, context.get().getSuccess()));
PlanNode source = node;
if (rewrittenProbeSource != node.getProbeSource()) {
source =
new IndexJoinNode(
node.getId(),
node.getType(),
rewrittenProbeSource,
node.getIndexSource(),
node.getCriteria(),
node.getProbeHashSymbol(),
node.getIndexHashSymbol());
}
return source;
}
@Override
public Map<Symbol, Symbol> visitIndexJoin(IndexJoinNode node, Set<Symbol> lookupSymbols) {
Set<Symbol> probeLookupSymbols =
lookupSymbols
.stream()
.filter(node.getProbeSource().getOutputSymbols()::contains)
.collect(toImmutableSet());
checkState(
!probeLookupSymbols.isEmpty(),
"No lookup symbols were able to pass through the index join probe source");
return node.getProbeSource().accept(this, probeLookupSymbols);
}
@Override
public PlanNode visitIndexJoin(IndexJoinNode node, RewriteContext<Set<Symbol>> context) {
ImmutableSet.Builder<Symbol> probeInputsBuilder = ImmutableSet.builder();
probeInputsBuilder
.addAll(context.get())
.addAll(Iterables.transform(node.getCriteria(), IndexJoinNode.EquiJoinClause::getProbe));
if (node.getProbeHashSymbol().isPresent()) {
probeInputsBuilder.add(node.getProbeHashSymbol().get());
}
Set<Symbol> probeInputs = probeInputsBuilder.build();
ImmutableSet.Builder<Symbol> indexInputBuilder = ImmutableSet.builder();
indexInputBuilder
.addAll(context.get())
.addAll(Iterables.transform(node.getCriteria(), IndexJoinNode.EquiJoinClause::getIndex));
if (node.getIndexHashSymbol().isPresent()) {
indexInputBuilder.add(node.getIndexHashSymbol().get());
}
Set<Symbol> indexInputs = indexInputBuilder.build();
PlanNode probeSource = context.rewrite(node.getProbeSource(), probeInputs);
PlanNode indexSource = context.rewrite(node.getIndexSource(), indexInputs);
return new IndexJoinNode(
node.getId(),
node.getType(),
probeSource,
indexSource,
node.getCriteria(),
node.getProbeHashSymbol(),
node.getIndexHashSymbol());
}
@Override
public Void visitIndexJoin(IndexJoinNode node, Void context) {
List<Expression> joinExpressions = new ArrayList<>();
for (IndexJoinNode.EquiJoinClause clause : node.getCriteria()) {
joinExpressions.add(
new ComparisonExpression(
ComparisonExpression.Type.EQUAL,
new QualifiedNameReference(clause.getProbe().toQualifiedName()),
new QualifiedNameReference(clause.getIndex().toQualifiedName())));
}
String criteria = Joiner.on(" AND ").join(joinExpressions);
String joinLabel = format("%sIndexJoin", node.getType().getJoinLabel());
printNode(node, joinLabel, criteria, NODE_COLORS.get(NodeType.JOIN));
node.getProbeSource().accept(this, context);
node.getIndexSource().accept(this, context);
return null;
}