Marklogic中xs：dateTime（）类型的cts：value-match

Question

I have a variable $yearMonth := "2015-02" I have to search this date on an element Date as xs:dateTime . I want to use regex expression to find all files/documents having this date "2015-02-??" I have path-range-index enabled on ModifiedInfo/Date I am using following code but getting Invalid cast error

let $result := cts:value-match(cts:path-reference("ModifiedInfo/Date"), xs:dateTime("2015-02-??T??:??:??.????"))

I have also used following code and getting same error

let $result := cts:value-match(cts:path-reference("ModifiedInfo/Date"), xs:dateTime(xs:date("2015-02-??"),xs:time("??:??:??.????")))

Kindly help :)

Answer 1

It seems you are trying to use wild card search on Path Range index which has data type xs:dateTime().

But, currently MarkLogic don't support this functionality. There are multiple ways to handle this scenario:

1. You may create Field index.
2. You may change it to string index which supports wildcard search.

3. You may run this workaround to support your existing system:

   for $x in cts:values(cts:path-reference("ModifiedInfo/Date")) return if(starts-with(xs:string($x), '2015-02')) then $x else ()

This query will fetch out values from lexicon and then you may filter your desired date.

Answer 2

You can solve this by combining a couple cts:element-range-querys inside of an and-query:

let $target := "2015-02"
let $low := xs:date($target || "-01")
let $high := $low + xs:yearMonthDuration("P1M")
return
  cts:search(
    fn:doc(),
    cts:and-query((
        cts:element-range-query("country", ">=", $low),
        cts:element-range-query("country", "<",  $high)
      ))
  )

From the cts:element-range-query documentation :

If you want to constrain on a range of values, you can combine multiple cts:element-range-query constructors together with cts:and-query or any of the other composable cts:query constructors, as in the last part of the example below.

Answer 3

You could also consider doing a cts:values with a cts:query param that searches for values between for instance 2015-02-01 and 2015-03-01. Mind though, if multiple dates occur within one document, you will need to post filter manually after all (like in option 3 of Navin), but it could potentially speed up post-filtering a lot..

HTH!