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  1. MariaDB Server
  2. MDEV-11858

json_merge() concatenates instead of merging

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.2(EOL)
    • 10.2.4
    • JSON

    Description

      I am not sure where to refer what "json merge" means formally, but looking in several places makes me think that current 10.2 behavior is incorrect :

      MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
      		 
      | {"a":"b", "a":"c"}                   |

      While both http://tools.knowledgewalls.com/onlinejsonmerger and MySQL 5.7 show:

      mysql > select json_merge('{"a":"b"}', '{"a":"c"}') ;
      		 
      | {"a": ["b", "c"]}                    |

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          anikitin Andrii Nikitin (Inactive) created issue -
          anikitin Andrii Nikitin (Inactive) made changes -
          Field Original Value New Value
          Description I am not sure where to refer what "json merge" means formally, but looking in several places makes me think that current 10.2 behavior is incorrect :

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a":"b", "a":"c"} |
          {sql}

          While both http://tools.knowledgewalls.com/onlinejsonmerger and MySQL 5.7 show:

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a": ["b", "c"]} |
          {sql}
          		I am not sure where to refer what "json merge" means formally, but looking in several places makes me think that current 10.2 behavior is incorrect :

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a":"b", "a":"c"} |
          {code}

          While both http://tools.knowledgewalls.com/onlinejsonmerger and MySQL 5.7 show:

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a": ["b", "c"]} |
          {code}
          anikitin Andrii Nikitin (Inactive) made changes -
          Description I am not sure where to refer what "json merge" means formally, but looking in several places makes me think that current 10.2 behavior is incorrect :

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a":"b", "a":"c"} |
          {code}

          While both http://tools.knowledgewalls.com/onlinejsonmerger and MySQL 5.7 show:

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a": ["b", "c"]} |
          {code}
          		I am not sure where to refer what "json merge" means formally, but looking in several places makes me think that current 10.2 behavior is incorrect :

          {code:sql}
          MariaDB [test]> select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a":"b", "a":"c"} |
          {code}

          While both http://tools.knowledgewalls.com/onlinejsonmerger and MySQL 5.7 show:

          {code:sql}
          mysql > select json_merge('{"a":"b"}', '{"a":"c"}') ;
          | {"a": ["b", "c"]} |
          {code}
          anikitin Andrii Nikitin (Inactive) added a comment - - edited

          It looks that (some) standard ( https://tools.ietf.org/html/rfc7386 ) defines expected result of this operation as 

          '{"a":"c"}'

          anikitin Andrii Nikitin (Inactive) added a comment - - edited It looks that (some) standard ( https://tools.ietf.org/html/rfc7386 ) defines expected result of this operation as '{"a":"c"}'
          elenst Elena Stepanova made changes -
          Affects Version/s 10.2 [ 14601 ]
          elenst Elena Stepanova made changes -
          Labels 10.2-rc
          holyfoot Alexey Botchkov made changes -
          Status Open [ 1 ] In Progress [ 3 ]
          holyfoot Alexey Botchkov added a comment -

          http://lists.askmonty.org/pipermail/commits/2017-February/010663.html

          holyfoot Alexey Botchkov added a comment - http://lists.askmonty.org/pipermail/commits/2017-February/010663.html
          holyfoot Alexey Botchkov made changes -
          issue.field.resolutiondate 2017-02-09 21:24:53.0 2017-02-09 21:24:53.39
          holyfoot Alexey Botchkov made changes -
          Fix Version/s 10.2.4 [ 22116 ]
          Fix Version/s 10.2 [ 14601 ]
          Resolution Fixed [ 1 ]
          Status In Progress [ 3 ] Closed [ 6 ]
          serg Sergei Golubchik made changes -
          Workflow MariaDB v3 [ 79303 ] MariaDB v4 [ 151570 ]

          People

            holyfoot Alexey Botchkov
            anikitin Andrii Nikitin (Inactive)
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            Dates

              Created:
              Updated:
              Resolved:

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