hyrise/hyrise — pull request #273 by mrks (2013-12-09 08:58:55+00:00)
Title: Fixed concurrency issue in InsertScan and PosUpdateScan:

Thread A: fetch before_size
Thread B: fetch before_size
B: append_to_delta
A: append_to_delta
For A, before_size+i is not the correct way to address its new rows anymore