Horton

Fix some obsolete information in src/backend/optimizer/README.

Tom Lane <tgl@sss.pgh.pa.us>

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Commit: 6331de1d44f01d408aa48c5c996bae8932f7a072
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2013-11-05T16:31:35Z
Releases: 9.4.0 
Fix some obsolete information in src/backend/optimizer/README.

Constant quals aren't handled the same way they used to be.  Also,
add mention of a couple more major steps in grouping_planner.
Per complaint a couple months back from Etsuro Fujita.

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src/backend/optimizer/README modified +2 −5