CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration k0 (children 1)
    DataType String
   ColumnDeclaration v00 (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Function groupArrayLast (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
 Storage definition (children 2)
  Function MergeTree
  Identifier k0
