" let g:sql_db = '...'
" unlet g:sql_db

" let g:sql_user = '...'
" unlet g:sql_user

" let g:sql_password = '...'
" unlet g:sql_password

function! SqlRC(start, end)
  let args = ['mysql', '-t']

  if exists('g:sql_user')
    call add(args, '-u' . get(g:, 'sql_user', ''))
  endif

  if exists('g:sql_password')
    call add(args, '-p' . get(g:, 'sql_password', ''))
  endif

  let end = a:end
  if end < 1
    let end = '$'
  endif

  let code = join(getline(a:start, end), "\n")
  call add(args, '-e')
  call add(args, code)

  if exists('g:sql_db')
    call add(args, get(g:, 'sql_db', ''))
  endif

  split
  call term_start(args, { 'curwin': v:true, })
endfunction

" Current selection
vnoremap <silent> mm :<C-U>call SqlRC(line("'<"), line("'>"))<CR>

" Current query/paragraph
nnoremap <silent> mm :call SqlRC(search('^\s*$', 'bnW') + 1, search('^\s*$', 'nW') - 1)<CR>

" Whole file
nnoremap <silent> MM :call SqlRC(1, '$')<CR>