Story § Sequential Scan Callstack src/backend § access § Types HeapTupleData HeapTupleHeaderData Funcs heap_beginscan heap_fetch_next_buffer heap_getnextslot heapgettup_pagemode initscan table_beginscan table_scan_getnextslot executor § Types TupleTableSlot Funcs ExecScan ExecScanFetch ExecSeqScan ExecStoreBufferHeapTuple SeqNext tts_buffer_heap_store_tuple postmaster § Funcs BackendStartup storage § aio § Types ReadStream Funcs read_stream_begin_relation read_stream_get_block read_stream_next_buffer buffer § Types Buffer BufferDesc BufferStrategyControl Funcs ClockSweepTick GetVictimBuffer InvalidateVictimBuffer StrategyGetBuffer