Question

我们正面临DB2 SQL的问题。我们正试图检查我们是否可以找到解决方案。

问题陈述：

编写SQL以更新XML节点，该节点根据某些条件以嵌套形式多次出现。下面是XML结构。 <RFPData>是根节点。

<RFPData>
.
.
.
.
<class dataStr="list">
                .
.
.
</class >
<class dataStr="list">
    <classCheckedProductStr>Life &amp;lt;br/&amp;gt;Dental &amp;lt;br/&amp;gt;</classCheckedProductStr>
    <classDescriptionOptionText>All Active Full-Time Assistant Vice Presidents</classDescriptionOptionText>
    <classDescriptionOption>5</classDescriptionOption>
    <life>
        <ClsLifePayPeriod>W</ClsLifePayPeriod>
        <coverage dataStr="list">
           <status>ACTIVE</status>
            <coverageId>50</coverageId>
            <coverageName>Buy Up Life with AD&amp;D</coverageName>
            <ClassLifeBasicLifeEmployee>22</ClassLifeBasicLifeEmployee>
            <covId>50</covId>
            <ClassLifeBasicLifeDependents>34</ClassLifeBasicLifeDependents>
            <isCoverageSelected>Y</isCoverageSelected>
            <SQ>0</SQ>
        </coverage>
        <coverage dataStr="list">
            <status>ACTIVE</status>
            <coverageId>54</coverageId>
            <coverageName>Buy Up Dependent Life with AD&amp;D</coverageName>
            <ClassLifeBasicLifeEmployee>44</ClassLifeBasicLifeEmployee>
            <covId>54</covId>
            <ClassLifeBasicLifeDependents>43</ClassLifeBasicLifeDependents>
            <isCoverageSelected>Y</isCoverageSelected>
            <SQ>1</SQ>
        </coverage>
        <clsFutureEmpWaitingPeriodRule>1STFLWP</clsFutureEmpWaitingPeriodRule>
        <clsCurrentEmpWaitingPeriodRule>1STFLWP</clsCurrentEmpWaitingPeriodRule>
        <status>ACTIVE</status>
        <clsCurrentEmpAveragedOver>-1</clsCurrentEmpAveragedOver>
        <isCoverageChecked>Y</isCoverageChecked>
        <clsCurrentEmpEarningsDefinition>-1</clsCurrentEmpEarningsDefinition>
        <clsFutureEmpWaitingPeriodUnit>DY</clsFutureEmpWaitingPeriodUnit>
        <ClsCurrentEmpLifeWaitingPeriodValue>14</ClsCurrentEmpLifeWaitingPeriodValue>
        <clsCurrentEmpWaitingPeriodUnit>DY</clsCurrentEmpWaitingPeriodUnit>
        <ClsLifeHoursWorked>12</ClsLifeHoursWorked>
        <ClsFutureEmpLifeWaitingPeriodValue>33</ClsFutureEmpLifeWaitingPeriodValue>
    </life>
    <SQ>0</SQ>
</class>
<class dataStr="list">
                .
.
.
</class >
.
.
.
.
</RFPData>

如果<classDescriptionOption>节点值为“所有有效的全职主管”，则上面蓝色突出显示的<classDescriptionOptionText>节点需要更新为值6。
但我们无法实现此目标，因为<class dataStr="list">可能存在多个<classDescriptionOption>。

当我们编写SQL脚本时，它更新了我们在update语句中提供的值6的所有事件，即使我们尝试将<classDescriptionOptionText>值等同为“所有活动的全职监督员”。 / LI>

使用的更新脚本如下。

UPDATE T_SL_APP
SET SL_XML_TXT = XMLQUERY('
copy $new := $SL_XML_TXT
modify (
for $i in $new/RFPData/classSetup/class/classDescriptionOption  return
do replace value of $i with "6"
)
return $new')
WHERE SL_APP_ID = '1184'
and xmlexists('$SL_XML_TXT//RFPData/classSetup/class[classDescriptionOptionText = "All Active Full-Time Supervisors"]');

有人可以帮我们解决。附上XML的整个结构以供参考。

Answer 1

未经过测试，但尝试在XQuery中使用谓词：

copy $new := $SL_XML_TXT
modify (
     for $i in $new/RFPData/classSetup/class[classDescriptionOptionText = "All Active Full-Time Supervisors"]/classDescriptionOption   
     return
         do replace value of $i with "6"
       )
return $new

上面只会迭代那些与Supervisor一起使用OptionText的“类”节点，访问Option并更新它。

如何在DB2表结构的XML中多次更新XML节点？

1 个答案: