Merge pull request #620 from yakolee/master

version 1.0.9 && bugfix for hint
Merge pull request #621 from yakolee/master

improve sqlwall
add testcase
Merge pull request #622 from wenshao/master

add testcase
Merge pull request #624 from yakolee/master

improve sqlwall
Merge pull request #627 from yakolee/master

revert wallconfig spell