CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType Int32
   ColumnDeclaration y (children 1)
    DataType Int32
 Storage definition (children 3)
  Function MergeTree
  Function multiply (children 1)
   ExpressionList (children 2)
    Function plus (children 1)
     ExpressionList (children 2)
      Function plus (children 1)
       ExpressionList (children 2)
        Identifier x
        Identifier y
      Literal UInt64_1
    Literal UInt64_2
  Function tuple (children 1)
   ExpressionList
