Merge pull request alibaba#753 from yakolee/master

bugfix for alibaba#728

add license

add license

Merge pull request alibaba#643 from yakolee/master

improve sqlwall

Merge pull request alibaba#614 from yakolee/master

bugfix for into outfile alibaba#582

modify version to 1.0.5

Merge pull request alibaba#510 from jacking124/master

fix issues alibaba#509

Merge pull request alibaba#505 from cutedemons/master

modify version

Merge pull request alibaba#475 from cutedemons/master

improve sql wall & fix datasource bug

0.2.26 publish