pass list of Pair to myBatis












1















I need to a list of Pair to MyBatis query:



in Mapper:



List<Usage> getUsageByUserLanguagesAndDates(
@Param("userLanguagePairList") List<Pair<String, String>> userLanguageMap,
@Param("startDate") DateTime startDate,
@Param("endDate") DateTime endDate)


List> userLanguageMap looks like this:



List<Pair<String, String>> pairs = Lists.newArrayList;
pairs.add(new Pair("12345", "en-US"));
pairs.add(new Pair("23456", "en-GB"));
...


and the query looks like this:



SELECT
...
FROM
...
WHERE 1=1
AND
(
(l.userid = '12345' AND ll.language_code = 'en-US') OR
(l.userid = '23456' AND ll.language_code = 'en-GB')
)
;


I tried to write the query as:



AND (
<foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="" separator="," close="">
(
l.userid = #{userLanguagePair.first}
AND
ll.language_code = #{userLanguagePair.second}
)
OR
</foreach>
)


...



but there will be an extra OR at the end:



AND 
(
(l.userid = '12345' AND ll.language_code = 'en-US') OR
(l.userid = '23456' AND ll.language_code = 'en-US') OR
)


how can i get rid of the last 'OR'?










share|improve this question



























    1















    I need to a list of Pair to MyBatis query:



    in Mapper:



    List<Usage> getUsageByUserLanguagesAndDates(
    @Param("userLanguagePairList") List<Pair<String, String>> userLanguageMap,
    @Param("startDate") DateTime startDate,
    @Param("endDate") DateTime endDate)


    List> userLanguageMap looks like this:



    List<Pair<String, String>> pairs = Lists.newArrayList;
    pairs.add(new Pair("12345", "en-US"));
    pairs.add(new Pair("23456", "en-GB"));
    ...


    and the query looks like this:



    SELECT
    ...
    FROM
    ...
    WHERE 1=1
    AND
    (
    (l.userid = '12345' AND ll.language_code = 'en-US') OR
    (l.userid = '23456' AND ll.language_code = 'en-GB')
    )
    ;


    I tried to write the query as:



    AND (
    <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="" separator="," close="">
    (
    l.userid = #{userLanguagePair.first}
    AND
    ll.language_code = #{userLanguagePair.second}
    )
    OR
    </foreach>
    )


    ...



    but there will be an extra OR at the end:



    AND 
    (
    (l.userid = '12345' AND ll.language_code = 'en-US') OR
    (l.userid = '23456' AND ll.language_code = 'en-US') OR
    )


    how can i get rid of the last 'OR'?










    share|improve this question

























      1












      1








      1








      I need to a list of Pair to MyBatis query:



      in Mapper:



      List<Usage> getUsageByUserLanguagesAndDates(
      @Param("userLanguagePairList") List<Pair<String, String>> userLanguageMap,
      @Param("startDate") DateTime startDate,
      @Param("endDate") DateTime endDate)


      List> userLanguageMap looks like this:



      List<Pair<String, String>> pairs = Lists.newArrayList;
      pairs.add(new Pair("12345", "en-US"));
      pairs.add(new Pair("23456", "en-GB"));
      ...


      and the query looks like this:



      SELECT
      ...
      FROM
      ...
      WHERE 1=1
      AND
      (
      (l.userid = '12345' AND ll.language_code = 'en-US') OR
      (l.userid = '23456' AND ll.language_code = 'en-GB')
      )
      ;


      I tried to write the query as:



      AND (
      <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="" separator="," close="">
      (
      l.userid = #{userLanguagePair.first}
      AND
      ll.language_code = #{userLanguagePair.second}
      )
      OR
      </foreach>
      )


      ...



      but there will be an extra OR at the end:



      AND 
      (
      (l.userid = '12345' AND ll.language_code = 'en-US') OR
      (l.userid = '23456' AND ll.language_code = 'en-US') OR
      )


      how can i get rid of the last 'OR'?










      share|improve this question














      I need to a list of Pair to MyBatis query:



      in Mapper:



      List<Usage> getUsageByUserLanguagesAndDates(
      @Param("userLanguagePairList") List<Pair<String, String>> userLanguageMap,
      @Param("startDate") DateTime startDate,
      @Param("endDate") DateTime endDate)


      List> userLanguageMap looks like this:



      List<Pair<String, String>> pairs = Lists.newArrayList;
      pairs.add(new Pair("12345", "en-US"));
      pairs.add(new Pair("23456", "en-GB"));
      ...


      and the query looks like this:



      SELECT
      ...
      FROM
      ...
      WHERE 1=1
      AND
      (
      (l.userid = '12345' AND ll.language_code = 'en-US') OR
      (l.userid = '23456' AND ll.language_code = 'en-GB')
      )
      ;


      I tried to write the query as:



      AND (
      <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="" separator="," close="">
      (
      l.userid = #{userLanguagePair.first}
      AND
      ll.language_code = #{userLanguagePair.second}
      )
      OR
      </foreach>
      )


      ...



      but there will be an extra OR at the end:



      AND 
      (
      (l.userid = '12345' AND ll.language_code = 'en-US') OR
      (l.userid = '23456' AND ll.language_code = 'en-US') OR
      )


      how can i get rid of the last 'OR'?







      mybatis






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 13 '18 at 23:26









      user468587user468587

      1,605104174




      1,605104174
























          1 Answer
          1






          active

          oldest

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          2














          From http://www.mybatis.org/mybatis-3/dynamic-sql.html:



          <foreach item="item" index="index" collection="list" open="(" separator="," close=")">,



          so I'd say your code should be something like this:



          ...
          WHERE 1=1 AND (
          <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator="OR" close=")">
          l.userid = #{userLanguagePair.first}
          AND
          ll.language_code = #{userLanguagePair.second}
          </foreach>
          )


          but right now I cannot check if this will generate the correct sentence.






          share|improve this answer
























          • I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

            – user468587
            Nov 14 '18 at 18:56











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          2














          From http://www.mybatis.org/mybatis-3/dynamic-sql.html:



          <foreach item="item" index="index" collection="list" open="(" separator="," close=")">,



          so I'd say your code should be something like this:



          ...
          WHERE 1=1 AND (
          <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator="OR" close=")">
          l.userid = #{userLanguagePair.first}
          AND
          ll.language_code = #{userLanguagePair.second}
          </foreach>
          )


          but right now I cannot check if this will generate the correct sentence.






          share|improve this answer
























          • I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

            – user468587
            Nov 14 '18 at 18:56
















          2














          From http://www.mybatis.org/mybatis-3/dynamic-sql.html:



          <foreach item="item" index="index" collection="list" open="(" separator="," close=")">,



          so I'd say your code should be something like this:



          ...
          WHERE 1=1 AND (
          <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator="OR" close=")">
          l.userid = #{userLanguagePair.first}
          AND
          ll.language_code = #{userLanguagePair.second}
          </foreach>
          )


          but right now I cannot check if this will generate the correct sentence.






          share|improve this answer
























          • I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

            – user468587
            Nov 14 '18 at 18:56














          2












          2








          2







          From http://www.mybatis.org/mybatis-3/dynamic-sql.html:



          <foreach item="item" index="index" collection="list" open="(" separator="," close=")">,



          so I'd say your code should be something like this:



          ...
          WHERE 1=1 AND (
          <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator="OR" close=")">
          l.userid = #{userLanguagePair.first}
          AND
          ll.language_code = #{userLanguagePair.second}
          </foreach>
          )


          but right now I cannot check if this will generate the correct sentence.






          share|improve this answer













          From http://www.mybatis.org/mybatis-3/dynamic-sql.html:



          <foreach item="item" index="index" collection="list" open="(" separator="," close=")">,



          so I'd say your code should be something like this:



          ...
          WHERE 1=1 AND (
          <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator="OR" close=")">
          l.userid = #{userLanguagePair.first}
          AND
          ll.language_code = #{userLanguagePair.second}
          </foreach>
          )


          but right now I cannot check if this will generate the correct sentence.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 14 '18 at 7:07









          Evgeni EnchevEvgeni Enchev

          3115




          3115













          • I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

            – user468587
            Nov 14 '18 at 18:56



















          • I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

            – user468587
            Nov 14 '18 at 18:56

















          I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

          – user468587
          Nov 14 '18 at 18:56





          I ended up with this: <foreach item="userLanguagePair" index="index" collection="userLanguagePairList" open="(" separator=") OR (" close=")">

          – user468587
          Nov 14 '18 at 18:56


















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