Github user ztao1987 commented on the issue:
https://github.com/apache/incubator-hawq/pull/1232
Seems these codes comes from a bunch of bug fix involved from GPDB commit
6b0e52beadd678c5050af9c978c26d171ba86ae0. For this specific bug, I have no
doubt it works. But for lock mechanism, gpdb fix involves more than that. Not
sure if there is potential issue in lock.
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