func init()
  fvar(old)
  old = block.select(BLK_INC)
  println('#include <QSqlQuery>')
  block.select(old)
end

func doExec(_data)
  fvar(db)
  db = DBHandle
  
  if(expof(db) != QDatabase)
    error('DBHandle is invalid!')
    return()
  end
  
  println('if(' + db + '.exec(', SQL, ').isValid()) {')
  block.inclvl()
    event(onExec)
  block.declvl()
  println('}')
  if(linked(onError))
    println('else {')
    block.inclvl()
      event(onError, (db + '.lastError().text()')@str)
    block.declvl()
    println('}')
  end 
end