Ignore statements containing only semicolons or whitespace#501
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Fixes #499.
Submitting a statement that contains only
;(or only whitespace/comments) crashed crash withIndexError: list index out of rangefromstmt_type(), sincere.findall(r'[\w]+', ...)returns an empty list._process_sqlnow skips statements that have no word characters after stripping comments, so an empty line is written instead of crashing.Added a regression test in
MultipleStatementsTest.