CreateQuery test_dup_index (children 3)
 Identifier test_dup_index
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType Int64
   ColumnDeclaration b (children 1)
    DataType Int64
  ExpressionList (children 2)
   Index (children 2)
    Identifier a
    Function minmax (children 1)
     ExpressionList
   Index (children 2)
    Identifier b
    Function minmax (children 1)
     ExpressionList
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier a
