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| author | Andres Freund <andres@anarazel.de> | 2019-02-26 18:15:59 -0800 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2019-02-26 18:15:59 -0800 |
| commit | 5408e233f0667478e7f2a3e4b914e14217e20729 (patch) | |
| tree | 9646e1504de1383d51f8f256bf74b8134ceaeab8 /src | |
| parent | 8aa02b52db11039925191912eca71e3584b68860 (diff) | |
| download | postgresql-5408e233f0667478e7f2a3e4b914e14217e20729.tar.gz postgresql-5408e233f0667478e7f2a3e4b914e14217e20729.zip | |
Allow to use HeapTupleData embedded in [Buffer]HeapTupleTableSlot.
That avoids having to care about the lifetime of the
HeapTupleHeaderData passed to ExecStore[Buffer]HeapTuple(). That
doesn't make a huge difference for a plain HeapTupleTableSlot, but for
BufferHeapTupleTableSlot it can be a significant advantage, avoiding
the need to materialize slots where it's inconvenient to provide a
HeapTupleData with appropriate lifetime to point to the on-disk tuple.
It's quite possible that we'll want to add support functions for
constructing HeapTuples using that embedded HeapTupleData, but for now
callers do so themselves.
Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/executor/tuptable.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/executor/tuptable.h b/src/include/executor/tuptable.h index 8da0b84dd7e..1e94beafac5 100644 --- a/src/include/executor/tuptable.h +++ b/src/include/executor/tuptable.h @@ -16,6 +16,7 @@ #include "access/htup.h" #include "access/tupdesc.h" +#include "access/htup_details.h" #include "storage/buf.h" /*---------- @@ -246,6 +247,7 @@ typedef struct HeapTupleTableSlot HeapTuple tuple; /* physical tuple */ #define FIELDNO_HEAPTUPLETABLESLOT_OFF 2 uint32 off; /* saved state for slot_deform_heap_tuple */ + HeapTupleData tupdata; /* optional workspace for storing tuple */ } HeapTupleTableSlot; /* heap tuple residing in a buffer */ |