CreateQuery test_aggregation_array (children 3)
 Identifier test_aggregation_array
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Int
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList
