empty output when query execute failed on mysql.

[LPX-E5BD8]

If the query executed failed for not a parser reason, soar will continue the loop , format suggest will be skipped.

test case

select * from sakila.film where xxx = '';

[martianzhang]

Table exist but column not match, mysql will raise error.
We should take a look if there is another case. check if it's necessary to continue after explain raise error.