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| author | Federico Caselli <cfederico87@gmail.com> | 2020-04-16 23:16:32 +0200 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2020-04-20 11:28:51 -0400 |
| commit | 07d6d211f23f1d9d1d69fd54e8054bccd515bc8c (patch) | |
| tree | 321a19e49f8918ec38bba96bf4c062633801bd26 /lib/sqlalchemy/testing/requirements.py | |
| parent | 2f617f56f2acdce00b88f746c403cf5ed66d4d27 (diff) | |
| download | sqlalchemy-07d6d211f23f1d9d1d69fd54e8054bccd515bc8c.tar.gz | |
Deprecate ``DISTINCT ON`` when not targeting PostgreSQL
Deprecate usage of ``DISTINCT ON`` in dialect other than PostgreSQL.
Previously this was silently ignored.
Deprecate old usage of string distinct in MySQL dialect
Fixes: #4002
Change-Id: I38fc64aef75e77748083c11d388ec831f161c9c9
Diffstat (limited to 'lib/sqlalchemy/testing/requirements.py')
| -rw-r--r-- | lib/sqlalchemy/testing/requirements.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/sqlalchemy/testing/requirements.py b/lib/sqlalchemy/testing/requirements.py index 644483b79..31011a970 100644 --- a/lib/sqlalchemy/testing/requirements.py +++ b/lib/sqlalchemy/testing/requirements.py @@ -1170,6 +1170,11 @@ class SuiteRequirements(Requirements): return exclusions.closed() @property + def supports_distinct_on(self): + """If a backend supports the DISTINCT ON in a select""" + return exclusions.closed() + + @property def supports_is_distinct_from(self): """Supports some form of "x IS [NOT] DISTINCT FROM y" construct. Different dialects will implement their own flavour, e.g., |