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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-05-06 12:24:00 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2021-05-06 13:57:43 -0400 |
| commit | 6967b4502079e199b12f5eb307d10d27ec92d537 (patch) | |
| tree | 01ac7d137bee27bfd8ec9432639115327e1fe636 /lib/sqlalchemy/dialects/mssql/information_schema.py | |
| parent | 900d76b8f757a8a42bfb8fc737d24a94eeeac05f (diff) | |
| download | sqlalchemy-6967b4502079e199b12f5eb307d10d27ec92d537.tar.gz | |
don't cache TypeDecorator by default
The :class:`.TypeDecorator` class will now emit a warning when used in SQL
compilation with caching unless the ``.cache_ok`` flag is set to ``True``
or ``False``. ``.cache_ok`` indicates that all the parameters passed to the
object are safe to be used as a cache key, ``False`` means they are not.
Fixes: #6436
Change-Id: Ib1bb7dc4b124e38521d615c2e2e691e4915594fb
Diffstat (limited to 'lib/sqlalchemy/dialects/mssql/information_schema.py')
| -rw-r--r-- | lib/sqlalchemy/dialects/mssql/information_schema.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sqlalchemy/dialects/mssql/information_schema.py b/lib/sqlalchemy/dialects/mssql/information_schema.py index c37920797..eb8f6db5b 100644 --- a/lib/sqlalchemy/dialects/mssql/information_schema.py +++ b/lib/sqlalchemy/dialects/mssql/information_schema.py @@ -25,6 +25,7 @@ ischema = MetaData() class CoerceUnicode(TypeDecorator): impl = Unicode + cache_ok = True def process_bind_param(self, value, dialect): if util.py2k and isinstance(value, util.binary_type): @@ -211,6 +212,7 @@ class IdentitySqlVariant(TypeDecorator): correct value as string. """ impl = Unicode + cache_ok = True def column_expression(self, colexpr): return cast(colexpr, Numeric) |