As noted by Talha https://github.com/citusdata/citus/pull/4029#issuecomment-660466972 there was still some sort order flappiness in the test.
The root cause is that sorting on `1::text` sorts on the literal `'1'` which causes sorting to be indeterministic.
This behaviour is consistent with Postgres' behaviour, so no bug on Citus' side.
As reported on #4011https://github.com/citusdata/citus/pull/4011/files#r453804702 some of the tests were flapping due to an indeterministic order for test outputs.
This PR makes the test output ordered for all tests returning non-zero rows.
Needs to be backported to 9.2, 9.3, 9.4
DESCRIPTION: Force aliases in deparsing for queries with anonymous column references
Fixes: #3985
The root cause has todo with discrepancies in the query tree we create. I think in the future we should spend some time on categorising all changes we made to ruleutils and see if we can change the data structure `query` we pass to the deparser to have an actual valid postgres query for the deparser to render.
For now the fix is to keep track, besides changing the names of the entries in the target list, also if we have a reference to an anonymous columns. If there are anonymous columns we set the `printaliases` flag to true which forces the deparser to add the aliases.
Nils Dijk