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| author | Nicolas Rolin <nicolas.rolin@cubber.com> | 2018-05-25 13:27:22 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2018-08-07 17:04:10 -0400 |
| commit | b17fa2513e412b8f9aa1f62c0acc7fa3805e632b (patch) | |
| tree | e0b565bbdb40394a1a55f10db63dd5408ee97822 /lib/sqlalchemy/sql/compiler.py | |
| parent | abeea1d82db34232bbef01e98fa4d1de0f583eb6 (diff) | |
| download | sqlalchemy-b17fa2513e412b8f9aa1f62c0acc7fa3805e632b.tar.gz | |
Add support of empty list in exanding of bindparam
Added new logic to the "expanding IN" bound parameter feature whereby if
the given list is empty, a special "empty set" expression that is specific
to different backends is generated, thus allowing IN expressions to be
fully dynamic including empty IN expressions.
Fixes: #4271
Change-Id: Icc3c73bbd6005206b9d06baaeb14a097af5edd36
Pull-request: https://github.com/zzzeek/sqlalchemy/pull/432
Diffstat (limited to 'lib/sqlalchemy/sql/compiler.py')
| -rw-r--r-- | lib/sqlalchemy/sql/compiler.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py index 529e28ba6..57da43217 100644 --- a/lib/sqlalchemy/sql/compiler.py +++ b/lib/sqlalchemy/sql/compiler.py @@ -1058,6 +1058,12 @@ class SQLCompiler(Compiled): self._emit_empty_in_warning() return self.process(binary.left == binary.left) + def visit_empty_set_expr(self, type_): + raise NotImplementedError( + "Dialect '%s' does not support empty set expression." % + self.dialect.name + ) + def visit_binary(self, binary, override_operator=None, eager_grouping=False, **kw): |