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