Comparing Dates
Hi Johnathan,
How about something like:
let $asset_type_code := "STY"
let $asset_creation_date := "20111017"
let $asset_creation_date_start :=
xs:dateTime(fn:replace($asset_creation_date, "^(\d{4})(\d{2})(\d{2})$",
"$1-$2-$3T00:00:00"))
let $asset_creation_date_end := $asset_creation_date_start +
xs:dayTimeDuration("P1D")
return
doc()[//assetTypeCode = $asset_type_code][//firstCreated >=
$asset_creation_date_start][//firstCreated < $asset_creation_date_end]/*
It might perform better though if you’d rewrite to for instance:
cts:search(
doc(),
cts:and-query((
cts:element-value-query(xs:QName("assetTypeCode"),
$asset_type_code),
cts:element-range-query(xs:QName("firstCreated"), ">=",
$asset_creation_date_start),
cts:element-range-query(xs:QName("firstCreated"), "<",
$asset_creation_date_end)
))
)/*
This requires a few indexes though..
Kind regards,
Geert
*Van:* [email protected] [mailto:
[email protected]] *Namens *Jonathan Cook
*Verzonden:* donderdag 8 maart 2012 17:59
*Aan:* MarkLogic Developer Discussion
*Onderwerp:* [MarkLogic Dev General] Comparing Dates
Hi,
I wondered what the best way to compare dates using mark logic xquery was?
My query looks like this at the moment:
import module namespace xinc = "http://marklogic.com/xinclude"; at
"/MarkLogic/xinclude/xinclude.xqy";
let $asset_type_code := "STY"
let $asset_creation_date := "20111017"
let $results := /*[
/*/itemMeta/assetTypeCode[text()=$asset_type_code] and
/*/itemMeta/firstCreated[text()='2011-10-17T14:47:52+00:00']
]
return $results
However what I would like to do is use the $asset_creation_date variable
which would be of format yyyyMMdd and see if it equals the first part of
the firstCreated element which is in a different format as above? There
doesn’t seem to be many date time functions and also I’m not sure if I’m
going about this slightly the wrong way or if I would have to do it in a
second FLOWR statement using some string comparison?
Thanks
Jon
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