For each of these joins, find which side of the join contains attributes from the facts object.
对于每个联结,查明联结的哪一边包含事实对象属性。
The Join object has left-side attributes and right-side attributes, which are compared to each other to form join predicates.
联结对象具有左属性和右属性,对这两个属性进行比较,从而形成联结谓词。
SQL expressions will need to be created from these attributes to form the join predicates of the SQL statement.
需要从这些属性创建SQL表达式,从而形成sql语句的联结谓词。
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