title: select table from other schema
body: <p>I have a table from schema "test":</p>
  
  <pre><code>class AttributeConversion(Base):
      __tablename__ = 'test.attribute_conversion'
  </code></pre>
  
  <p>How to select records from this table?</p>
  
  <p>SQLAlchemy generates SQL:</p>
  
  <pre><code>select * from "test.attribute_conversion"
  </code></pre>
  
  <p>But it doesn't work. The correct query must be:</p>
  
  <pre><code>select * from test.attribute_conversion  (without quotes)
  </code></pre>