[Sqlalchemy-commits] commit/sqlalchemy: zzzeek: Raise if ForeignKeyConstraint created with different numbers of

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1 new commit in sqlalchemy:

https://bitbucket.org/zzzeek/sqlalchemy/commits/0769b41cf291/
Changeset:   0769b41cf291
Branch:      rel_1_1
User:        zzzeek
Date:        2017-05-25 20:25:09+00:00
Summary:     Raise if ForeignKeyConstraint created with different numbers of
local and remote columns.

An :class:`.ArgumentError` is now raised if a
:class:`.ForeignKeyConstraint` object is created with a mismatched
number of "local" and "remote" columns, which otherwise causes the
internal state of the constraint to be incorrect.   Note that this
also impacts the condition where a dialect's reflection process
produces a mismatched set of columns for a foreign key constraint.

Downstream DB2 dialect has been reported as potentially causing this
scenario.

Change-Id: Id51c34a6c43749bb582639f9c1dc28723482f0e5
Fixes: #3949
References: #3998
(cherry picked from commit a78718b9340e9840a470300932af178ce57c0f7d)

Affected #:  3 files

Repository URL: https://bitbucket.org/zzzeek/sqlalchemy/

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