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Text-format spellings can also include operation, strategy, join type, scan direction or aggregation-stage attributes.", "Text names recorded by this source: ProjectSet.", "Parallel-aware and parallel-safe are different plan properties. A node running inside a parallel worker is not necessarily a parallel-aware node."]}, {"title": "Memory and temporary storage", "paragraphs": ["This extraction does not assign a universal memory limit or spill policy to this node. Inspect the same-build implementation and its expressions or provider."]}, {"title": "Parallel execution and instrumentation", "paragraphs": ["The source callbacks below can coordinate execution or collect worker instrumentation. Their presence is not a blanket claim that this node supports a shared parallel scan or shared state.", "Callbacks in this build: none extracted from this node implementation."]}, {"title": "Executor implementation notes", "paragraphs": ["nodeProjectSet.c support for evaluating targetlists containing set-returning functions", "ProjectSet nodes are inserted by the planner to evaluate set-returning functions in the targetlist. It's guaranteed that all set-returning functions are directly at the top level of the targetlist, i.e. they can't be inside more-complex expressions. If that'd otherwise be the case, the planner adds additional ProjectSet nodes.", "Return tuples after evaluating the targetlist (which contains set returning functions).", "Reset per-tuple context to free expression-evaluation storage allocated for a potentially previously returned tuple. Note that the SRF argument context has a different lifetime and is reset below.", "Check to see if we're still projecting out tuples from a previous scan tuple (because there is a function-returning-set in the projection expressions). If so, try to project another one."]}, {"code": "case T_ProjectSet:\n\t\t\tpname = sname = \"ProjectSet\";\n\t\t\tbreak;", "title": "EXPLAIN identity in core source"}], "strategies": [], "description": ["Evaluates set-returning expressions in the target list for rows from its child."], "evidence_kind": "source and documentation", "explain_names": ["ProjectSet"], "partial_modes": [], "comparison_data": {"node_tag": "T_ProjectSet", "strategies": [], "text_names": ["ProjectSet"], "initializer": "ExecInitProjectSet", "partial_modes": [], "memory_mechanism": "unclassified", "parallel_callbacks": []}, "comparison_hash": "67eb48dae4edf18acce1d9762e9a041057c4b07a8b1b127ee6f4a2bca7960ed8", "explain_prefixes": ["Parallel", "Async"], "runtime_verified": false, "source_inventory": {"explain": "src/backend/commands/explain.c", "executor": "src/backend/executor/execProcnode.c", "implementation": "src/backend/executor/nodeProjectSet.c"}, "parallel_callbacks": []}, "comparison": {"left": "17", "right": "18", "status": "unchanged", "diff": ""}}