CreateQuery test (children 2)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType String
   ColumnDeclaration products (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair 产品 (children 1)
       DataType Array (children 1)
        ExpressionList (children 1)
         DataType String
      NameTypePair 销量 (children 1)
       DataType Array (children 1)
        ExpressionList (children 1)
         DataType Int32