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Remove dead code supporting mark/restore in SeqScan, TidScan, ValuesScan.

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There seems no prospect that any of this will ever be useful, and indeed
it's questionable whether some of it would work if it ever got called;
it's certainly not been exercised in a very long time, if ever. So let's
get rid of it, and make the comments about mark/restore in execAmi.c less
wishy-washy.

The mark/restore support for Result nodes is also currently dead code,
but that's due to planner limitations not because it's impossible that
it could be useful.  So I left it in.
This commit is contained in:
Tom Lane
2014-11-20 20:20:54 -05:00
parent a34fa8ee7c
commit adbfab119b
11 changed files with 13 additions and 213 deletions
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src/include/access/heapam.h
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@@ -161,9 +161,6 @@ extern void simple_heap_delete(Relation relation, ItemPointer tid);
extern void simple_heap_update(Relation relation, ItemPointer otid,
HeapTuple tup);
extern void heap_markpos(HeapScanDesc scan);
extern void heap_restrpos(HeapScanDesc scan);
extern void heap_sync(Relation relation);
/* in heap/pruneheap.c */