[Sqlalchemy-tickets] [sqlalchemy] #2899: regression in CAST behavior due to type_coerce enhancement

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

#2899: regression in CAST behavior due to type_coerce enhancement
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 Reporter:  zzzeek   |           Owner:  zzzeek
     Type:  defect   |          Status:  new
 Priority:  highest  |       Milestone:  0.9.0
Component:  sql      |        Severity:  major - 1-3 hours
 Keywords:           |  Progress State:  in progress
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 works in 0.8, fails in 0.9:

 {{{
 from sqlalchemy import *

 class MyType(TypeDecorator):
     impl = Unicode

 type_ = MyType()

 value = cast(literal("hi", type_), Unicode)
 assert value.clause.type is type_  # <- becomes unicode, MyType is lost
 }}}

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2899>
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