CreateQuery tbl2 (children 3)
 Identifier tbl2
 Columns definition (children 2)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType Int
   ColumnDeclaration x (children 1)
    DataType Int
   ColumnDeclaration y (children 1)
    DataType Int
  ExpressionList (children 1)
   Index (children 2)
    Identifier x
    Function minmax (children 1)
     ExpressionList
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier key
