Zdenek Kotala wrote:
> Is there any reason to have both these macros? By my opinion
> MaxHeapTuplesPerPage is more accurate and it should replace all
> MaxOffsetNumber occurrence.

We use MaxOffsetNumber with index pages as well.

At quick glance, the only places I can see where we could replace
MaxOffsetNumber with MaxHeapTuplesPerPage, are in vacuum.c and
vacuumlazy.c, where we allocate arrays big enough to hold potentially a
full page's worth of tuples. We could change those, but it's hardly
worth the trouble.

  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com

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