如何在MarkLogic中比较日期？

时间：2018-07-13 09:54:08

标签： xquery marklogic

我在$ doc变量下面有XML 

 let $doc := <root>
              <date>12/31/2016</date>
             </root>

我想把这个日期和今天的日期进行比较。它应该使我返回True，但会使我返回false。

我正在使用下面的代码-

let $doc := <root>
              <date>12/31/2016</date>
             </root>


let $date := $doc/date/text()
let $today :=fn:format-date(fn:current-date(),"[M01]/[D01]/[Y0001]")
return $date le $today

有什么建议吗？

3 个答案:

答案 0 :(得分：5)

您需要将日期字符串转换为xs：date，以便能够通过这种方式进行比较。使用fn:format-date()格式化只会产生一个字符串，而fn:current-date()会返回xs：date。该代码段完成了您想要的操作，但是您可能还需要考虑以xs：date格式（即<date>2016-12-31</date>）将数据持久保存在文档中。 

let $doc := 
    <root>
        <date>12/31/2016</date>
    </root>
let $date-string := $doc/date/text()
let $date-parts := fn:tokenize($date-string,"/")

(: rearrange date parts into yyyy-mm-dd string and cast as xs:date :)
let $date := xs:date(fn:concat($date-parts[3],"-",$date-parts[1],"-",$date-parts[2]))

let $today := fn:current-date()

return $date le $today

=> false

如果日期以xs：date格式保留，则可以这样简化：

let $doc := 
    <root>
        <date>2016-12-31</date>
    </root>

return xs:date($doc/date/text()) le fn:current-date()

当日期以这种方式保留后，您还可以在date元素上使用范围索引来利用cts:element-range-query()来选择满足所需条件的文档，等等。

答案 1 :(得分：2)

您在代码中所做的工作将创建2个xs：string变量，然后将它们进行词法比较。 （例如，“ 2016年12月31日”与“ mm / dd / yyyy”进行比较） 这将根据语言环境进行比较，因为字符串比较而不是日期比较。 仅有几种格式可以将词法与按输入日期值进行比较，xs：date是其中一种格式，其格式为YYYY-MM-DD，具有可比词法和按输入日期进行比较的特性。 br /> 通常，最好不要依赖于此，而是将其转换为xs：date或xs：dateTime并按dateTime值进行比较-步骤相同，您需要使用xdmp将这些文本值强制转换为标准日期格式：parse-dateTime（）或提供给定格式的类似函数，或者通过解析文本格式并生成所需的xs：date（）格式。然后比较两个键入的日期值。

https://docs.marklogic.com/xdmp:parse-dateTime

答案 2 :(得分：1)

我使用了以下方法-

java.lang.IllegalStateException: Failed to load ApplicationContext

    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)
    at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runners.Suite.runChild(Suite.java:128)
    at org.junit.runners.Suite.runChild(Suite.java:27)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800)
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:781)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:335)
    at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:139)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:117)
    ... 32 more
Caused by: org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [insert into acl_entry (acl_object_identity, ace_order, sid, mask, granting, audit_success, audit_failure)values (?, ?, ?, ?, ?, ?, ?)Cannot add or update a child row: a foreign key constraint fails (`iresource2test`.`acl_entry`, CONSTRAINT `fk_acl_entry_object` FOREIGN KEY (`acl_object_identity`) REFERENCES `acl_object_identity` (`id`)); nested exception is java.sql.BatchUpdateException: Cannot add or update a child row: a foreign key constraint fails (`iresource2test`.`acl_entry`, CONSTRAINT `fk_acl_entry_object` FOREIGN KEY (`acl_object_identity`) REFERENCES `acl_object_identity` (`id`))
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:246)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
    at org.springframework.jdbc.core.JdbcTemplate.translateException(JdbcTemplate.java:1402)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:620)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:634)
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:924)
    at org.springframework.security.acls.jdbc.JdbcMutableAclService.createEntries(JdbcMutableAclService.java:138)
    at org.springframework.security.acls.jdbc.JdbcMutableAclService.updateAcl(JdbcMutableAclService.java:363)
    at com.roberto.bootstrap.AppBootstrap.lambda$grantPermission$6(AppBootstrap.java:144)
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140)
    at com.roberto.bootstrap.AppBootstrap.grantPermission(AppBootstrap.java:144)
    at com.roberto.bootstrap.AppBootstrap.lambda$initialRights$3(AppBootstrap.java:115)
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:797)
    ... 37 more
Caused by: java.sql.BatchUpdateException: Cannot add or update a child row: a foreign key constraint fails (`iresource2test`.`acl_entry`, CONSTRAINT `fk_acl_entry_object` FOREIGN KEY (`acl_object_identity`) REFERENCES `acl_object_identity` (`id`))
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:488)
    at com.mysql.cj.util.Util.handleNewInstance(Util.java:210)
    at com.mysql.cj.util.Util.getInstance(Util.java:185)
    at com.mysql.cj.util.Util.getInstance(Util.java:192)
    at com.mysql.cj.jdbc.exceptions.SQLError.createBatchUpdateException(SQLError.java:218)
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeBatchSerially(ClientPreparedStatement.java:864)
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeBatchInternal(ClientPreparedStatement.java:453)
    at com.mysql.cj.jdbc.StatementImpl.executeBatch(StatementImpl.java:839)
    at com.zaxxer.hikari.pool.ProxyStatement.executeBatch(ProxyStatement.java:128)
    at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeBatch(HikariProxyPreparedStatement.java)
    at org.springframework.jdbc.core.JdbcTemplate.lambda$batchUpdate$2(JdbcTemplate.java:938)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605)
    ... 46 more
Caused by: java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`iresource2test`.`acl_entry`, CONSTRAINT `fk_acl_entry_object` FOREIGN KEY (`acl_object_identity`) REFERENCES `acl_object_identity` (`id`))
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:115)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:960)
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeUpdateInternal(ClientPreparedStatement.java:1116)
    at com.mysql.cj.jdbc.ClientPreparedStatement.executeBatchSerially(ClientPreparedStatement.java:843)
    ... 52 more
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