diff options
Diffstat (limited to 'lib/sqlalchemy/engine.py')
| -rw-r--r-- | lib/sqlalchemy/engine.py | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/lib/sqlalchemy/engine.py b/lib/sqlalchemy/engine.py index bc39d90d9..f23701424 100644 --- a/lib/sqlalchemy/engine.py +++ b/lib/sqlalchemy/engine.py @@ -176,23 +176,33 @@ class SQLEngine(schema.SchemaEngine): else: self.logger = logger - def _figure_paramstyle(self): + def _set_paramstyle(self, style): + self._paramstyle = style + self._figure_paramstyle(style) + paramstyle = property(lambda s:s._paramstyle, _set_paramstyle) + + def _figure_paramstyle(self, paramstyle=None): db = self.dbapi() - if db is not None: - self.paramstyle = db.paramstyle + if paramstyle is not None: + self._paramstyle = paramstyle + elif db is not None: + self._paramstyle = db.paramstyle else: - self.paramstyle = 'named' + self._paramstyle = 'named' - if self.paramstyle == 'named': + if self._paramstyle == 'named': self.bindtemplate = ':%s' self.positional=False - elif self.paramstyle =='pyformat': + elif self._paramstyle == 'pyformat': self.bindtemplate = "%%(%s)s" self.positional=False - else: - # for positional, use pyformat until the end + elif self._paramstyle == 'qmark' or self._paramstyle == 'format' or self._paramstyle == 'numeric': + # for positional, use pyformat internally, ANSICompiler will convert + # to appropriate character upon compilation self.bindtemplate = "%%(%s)s" - self.positional=True + self.positional = True + else: + raise "Unsupported paramstyle '%s'" % self._paramstyle def type_descriptor(self, typeobj): """provides a database-specific TypeEngine object, given the generic object |