What's the purpose of mark/restrpos in heapam.c?
AFAIK, mark/restore is only used by merge joins, and you can't feed a
merge join from a heap scan because merge join requires sorted input.
Unless I'm missing something, heap_markpos and heap_restrpos are dead code.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
