DB Connect v2 doesn't accept a slash in a SQL query because this sign is defined as reserved in urllib.py file. For resolution of the issue see my comment in a similar topic (https://answers.splunk.com/answers/341611/splunk-db-connect-2-slash-in-sql-query-always-retu.html#answer-392823) please:
To resolve the issue, you should edit
$SPLUNK_HOME/etc/apps/splunk_app_db_connect/bin/dbxquery.py:
change the line (usually its number is 123)
query = urllib.quote(query)
to
query = urllib.quote(query, safe='')
Don't forget to make a backup copy before editing. Take care to keep changes after upgrades.
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