[Sqlalchemy-tickets] Issue #4036: mysql decimal cast on bind parameters (zzzeek/sqlalchemy)

[Michael B. <iss...@bi...>]

New issue 4036: mysql decimal cast on bind parameters
https://bitbucket.org/zzzeek/sqlalchemy/issues/4036/mysql-decimal-cast-on-bind-parameters

Michael Bayer:

as in https://bitbucket.org/zzzeek/sqlalchemy/src/2ae2c25c5d24c26fdca979b091cd432c64be822d/lib/sqlalchemy/testing/suite/test_types.py?at=master&fileviewer=file-view-default#test_types.py-442, decimals are sent as strings to MySQL which doesn't know to interpret them with numeric accuracy.   ensure #3981 is done using "method two" to allow for dialect-level bind expressions and implement a cast in bind_expression().