[Sqlalchemy-tickets] [sqlalchemy] #2736: remove auto-aliasing from select_from()

[sqlalchemy <mi...@zz...>]

#2736: remove auto-aliasing from select_from()
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 Reporter:  zzzeek  |           Owner:  zzzeek
     Type:  defect  |          Status:  new
 Priority:  high    |       Milestone:  0.9.0
Component:  orm     |        Severity:  minor - half an hour
 Keywords:          |  Progress State:  in progress
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 The original use for select_from() is becoming obsolete.  You can query
 from a selectable and replace the primary entity using `aliased()`.  The
 behavior of `select_from()` where it applies the selectable as an alias to
 the existing entities is unexpected behavior at this point as most users
 are just trying to set up the FROM clause for a JOIN.   The attached patch
 changes this so that the old functionality is available via
 `select_entity_from()`.

 The `select_entity_from()` method can be added to 0.8 so that users have
 an upgrade path into 0.9.

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2736>
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