How to check if metadata exists in mysql before migrate?

[fuhaiq]

Is it possible to check data in mysql before migrate?

What I expect's :

/usr/share/hue/build/env/bin/hue checkDataFromDB # Is there a sub-command behave like this ??

if [ $? -eq 1 ]
then
  echo "begin to migrate"
  /usr/share/hue/build/env/bin/hue migrate
else
  echo "no need to migrate"
fi

Thanks!!