[英]Combining multiple MarkLogic queries with cts:search
我正在嘗試在 MarkLogic 中查詢文檔數據庫以找到適合多個參數的任何文檔:
這一定是真的
其中一個必須是真的:
extra-documents
列表必須在其中任何一個比提供的日期更新extra-documents
date-added
字段newer-document-date
字段例如,有人可能傳入10
的authorId
和2017-01-01T00:00:00
的dateTime
下面是解釋為什么應該/不應該返回它們的示例(刪除了無關的 XML)
This document should be returned because it has an extra-document with a date-added that is more recent than the provided date, and a matching author.
<metadata>
<extra-documents>
<extra-document>
<date-added>2018-09-11T00:00:00</date-added>
</extra-document>
</extra-documents>
<book-authors>
<book-author>10</book-author>
<book-author>20</book-author>
</book-family-authors>
</metadata>
This document should be returned because it has a newer-document-date greater than the provided date
<metadata>
<extra-documents>
<extra-document>
<date-added>2000-09-11T00:00:00</date-added>
</extra-document>
</extra-documents>
<book-authors>
<book-author>10</book-author>
<book-author>20</book-author>
</book-family-authors>
<newer-document-date>2019-02-03T00:00:00</newer-document-date>
</metadata>
This document should NOT be returned because it is missing the author, even though it fills the date requirement on both the extra-document and the newer-document-date
<metadata>
<extra-documents>
<extra-document>
<date-added>2020-09-05T00:00:00</date-added>
</extra-document>
</extra-documents>
<book-authors>
<book-author>20</book-author>
</book-family-authors>
<newer-document-date>2019-02-03T00:00:00</newer-document-date>
</metadata>
我cts:search
開始使用cts:search
,並且無法弄清楚如何構建這樣一個可以搜索特定節點的復雜查詢。 我想出的最好的是:
cts:search(/*,
cts:and-query ((
cts:search(/*:metadata/*:book-authors/*:book-author, $author-id),
cts:element-query(
fn:QName("http://example.com/collection/book-metadata", "newer-document-date"),
cts:true-query()
), <-- this element-query was an attempt to make sure the field exists on the book, as some books don't have this field
cts:search(/*:metadata,
cts:element-range-query(fn:QName("http://example.com/collection/book-metadata", "newer-document-date"), "<", $date-from)
))
)
)
但是,這似乎無法正常工作,並且嘗試添加第三個要求非常困難,以至於我現在只是想立即實施前兩個要求。 對此的任何幫助表示贊賞。 我不確定cts:search
是否是最好的方法,或者我是否正確使用/*:metadata...
類的東西來搜索特定字段
包裝兩個查詢以查找date-added
元素或newer-document-date
,其值小於cts:or-query()
的$date-from
,並將其應用到cts:and-query()
以及$author-id
值的cts:element-value-query()
:
declare namespace meta = "http://example.com/collection/book-metadata";
cts:search(doc(),
cts:and-query((
cts:element-value-query(xs:QName("meta:book-author"), $author-id),
cts:or-query((
cts:element-query(xs:QName("meta:date-added"), cts:true-query()),
cts:element-range-query(xs:QName("meta:newer-document-date"), "<", "$date-from")
))
))
)
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