update cscope db from vim

I use cscope with vim. When doing large edits for several files, cscope will report old line numbers for changed files. How can I rebuild cscope db from vim without losing

• opened tabs/windowses in vim
• connection with cscope engine

Thanks

First, you need to update cscope database.

:!cscope -Rbq

Then, reinit the database from vim.

:cs reset