> What needs to be done? Mongo tests fail for me (see https://issues.apache.org/jira/browse/CALCITE-507?focusedCommentId=14355683&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14355683 ).
I am preparing a conference talk, so I have no much time and momentum to fix Mongo issues (not sure if the issue is in Mongo adapter or in Calcite core). I can commit pull/50 and we can see if anyone else would be able to run mongo tests. At least, pull/50 does not break other tests and it adds testing of MySQL, PostgreSQL, and H2, so it improves test coverage somehow. Vladimir
