tree 65950585e59e2c0348c733679242459f888c6802
parent ef4e6a3a9f7dfa3d20bf0510b840e1a329be3768
author luochen01 <cluo8@uci.edu> 1506961904 -0700
committer Luo Chen <cluo8@uci.edu> 1506967085 -0700

[ASTERIXDB-2119][COMP] Fix variable ordering of projects

- user model changes: no
- storage format changes: no
- interface changes: no

Details:

The current IntroduceProjectsRule implementation uses HashSet to
calculate projected variables, which makes the ordering of output
variables unpreditable. This patch fixes this undesired behavior by
using LinkedHashSet to ensure the project variables have the same
ordering from the original variables.

Change-Id: Id96a5fe048dd11b7f2e97f4d4a802736ba5ba003
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2043
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Taewoo Kim <wangsaeu@gmail.com>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>