AlterQuery  tbl (children 3)
 ExpressionList (children 1)
  AlterCommand ADD_INDEX (children 1)
   Index (children 2)
    Function tuple (children 1)
     ExpressionList (children 3)
      Function plus (children 1)
       ExpressionList (children 2)
        Identifier id
        Literal UInt64_1
      Identifier id
      Function plus (children 1)
       ExpressionList (children 2)
        Identifier id
        Literal UInt64_1
    Function minmax (children 1)
     ExpressionList
 Identifier tbl
 Set
