FAQ

On 23 June 2013 03:16, Stephen Frost wrote:

Still doesn't really address the issue of dups though.
Checking for duplicates in all cases would be wasteful, since often we
are joining to the PK of a smaller table.

If duplicates are possible at all for a join, then it would make sense
to build the hash table more carefully to remove dupes. I think we
should treat that as a separate issue.

--
  Simon Riggs http://www.2ndQuadrant.com/
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