title: sql-mode doesn't work in emacs: can't send a string in a SQL to the buffer to run in database
body: <p>I installed a package of vertica to enable sql running against vertica. And I could open a new window by kick off a start session command in the menu under "SQL", and then I mark a region, run the command of "sql-send-region" using M-x. it returned message in minu buffer is "Sent strings to buffer <em>SQL</em>", however in the <em>SQL</em> buffer, there is no string appended. What's the possbile reason. I have installed evil mode, even after I toggled it to edit in emacs mode, it still doesn't work.</p>