CreateQuery test (children 3)
 Identifier test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      DataType String
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType Map (children 1)
         ExpressionList (children 2)
          DataType String
          DataType LowCardinality (children 1)
           ExpressionList (children 1)
            DataType UInt64
 Storage definition (children 1)
  Function Memory
