presto-main/src/main/java/io/prestosql/sql/planner/optimizations/UnaliasSymbolReferences.java/Rewriter/visitIndexJoin
class Rewriter:        @Override
        public PlanNode visitIndexJoin(IndexJoinNode node, RewriteContext<Void> context)
        {
            PlanNode probeSource = context.rewrite(node.getProbeSource());
            PlanNode indexSource = context.rewrite(node.getIndexSource());

            return new IndexJoinNode(node.getId(), node.getType(), probeSource, indexSource, canonicalizeIndexJoinCriteria(node.getCriteria()), canonicalize(node.getProbeHashSymbol()), canonicalize(node.getIndexHashSymbol()));
        }