Subselects...

src/include/executor/executor.h

src/include/executor/nodeAgg.h

src/include/executor/nodeHash.h

src/include/executor/nodeHashjoin.h

src/include/executor/nodeMaterial.h

src/include/executor/nodeNestloop.h

src/include/executor/nodeResult.h

src/include/executor/nodeSubplan.h

src/include/optimizer/clauses.h

src/include/optimizer/planner.h

src/include/optimizer/subselect.h