CreateQuery t0 (children 3)
 Identifier t0
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration c0 (children 1)
    DataType Int
   ColumnDeclaration c1 (children 2)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int
    Literal UInt64_1
 Storage definition (children 3)
  Function SummingMergeTree (children 1)
   ExpressionList
  Function abs (children 1)
   ExpressionList (children 1)
    Identifier c1
  Set
