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From "Dieter Vekeman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-25013) JDBC urls with jdbc:mariadb don't work as expected
Date Fri, 03 Aug 2018 10:34:00 GMT
Dieter Vekeman created SPARK-25013:
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             Summary: JDBC urls with jdbc:mariadb don't work as expected
                 Key: SPARK-25013
                 URL: https://issues.apache.org/jira/browse/SPARK-25013
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.3.1
            Reporter: Dieter Vekeman


When using the MariaDB JDBC driver, the JDBC connection url should be  
{code:java}
jdbc:mariadb://localhost:3306/DB?user=someuser&password=somepassword
{code}
https://mariadb.com/kb/en/library/about-mariadb-connector-j/
However this does not work well in Spark (see below)

*Workaround*
The MariaDB driver also supports using mysql which does work.

The problem seems to have been described and identified in:
https://jira.mariadb.org/browse/CONJ-421

All works well with spark using connection string with {{"jdbc:mysql:..."}}, but not using
{{"jdbc:mariadb:..."}} because MySQL dialect is then not used.
when not used, defaut quote is {{"}}, not {{`}}
So, some internal query generated by spark like {{SELECT `i`,`ip` FROM tmp}} will then be
executed as {{SELECT "i","ip" FROM tmp}} with dataType previously retrieved, causing the exception

The author of the comment says
{quote}I'll make a pull request to spark so "jdbc:mariadb:" connection string can be handle{quote}

Did the pull request get lost or should a new one be made?




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