base.py 文件源码

def visit_join(self, join, **kwargs):
        if self.dialect.use_ansi:
            return compiler.SQLCompiler.visit_join(self, join, **kwargs)
        else:
            kwargs['asfrom'] = True
            if isinstance(join.right, expression.FromGrouping):
                right = join.right.element
            else:
                right = join.right
            return self.process(join.left, **kwargs) + \
                ", " + self.process(right, **kwargs)