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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