CreateQuery sorting_key_contain_function (children 3)
 Identifier sorting_key_contain_function
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration datetime (children 1)
    DataType DateTime
   ColumnDeclaration a (children 1)
    DataType int
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Function toDate (children 1)
   ExpressionList (children 1)
    Identifier datetime
  Set
