CreateQuery set_index__fuzz_41 (children 3)
 Identifier set_index__fuzz_41
 Columns definition (children 2)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType Date
   ColumnDeclaration b (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType DateTime64 (children 1)
       ExpressionList (children 1)
        Literal UInt64_3
  ExpressionList (children 1)
   Index (children 2)
    Identifier b
    Function set (children 1)
     ExpressionList (children 1)
      Literal UInt64_0
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
