diff options
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 03476633a..86611baeb 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -199,6 +199,9 @@ class ClauseElement( """ supports_execution = False + + stringify_dialect = "default" + _from_objects = [] bind = None description = None @@ -435,6 +438,7 @@ class ClauseElement( return self @util.preload_module("sqlalchemy.engine.default") + @util.preload_module("sqlalchemy.engine.url") def compile(self, bind=None, dialect=None, **kw): """Compile this SQL expression. @@ -482,14 +486,20 @@ class ClauseElement( """ - default = util.preloaded.engine_default if not dialect: if bind: dialect = bind.dialect elif self.bind: dialect = self.bind.dialect else: - dialect = default.StrCompileDialect() + if self.stringify_dialect == "default": + default = util.preloaded.engine_default + dialect = default.StrCompileDialect() + else: + url = util.preloaded.engine_url + dialect = url.URL.create( + self.stringify_dialect + ).get_dialect()() return self._compiler(dialect, **kw) |