tree 1cc732cfa8d8c2c03e4e69c8baa1eba2017d69e0
parent 834fc1438798e68e91763edbb87baeaf5bc1ab67
author Yingyi Bu <yingyi@couchbase.com> 1451520314 -0800
committer Yingyi Bu <buyingyi@gmail.com> 1451538847 -0800

Fix for ASTERIXDB-1018, ASTERIXDB-1017, ASTERIXDB-1019,
ASTERIXDB-1020, ASTERIXDB-1029, ASTERIXDB-1030, ASTERIXDB-1034:

1. Let the keys of introduced nested group-bys (group-bys in a subplan) be only the
variables that are produced in the subplan;

2. In PushSelectIntoJoinRule, push independent operators (e.g., a current-datetime() call)
into the first branch from which the join condition refers some variables.

3. In SimpleUnnestToJoinRule, move the boundary between the two join branches of a added join
which results from pipelined datascans to be below operators that doesn't use any variables
(e.g., a current-datetime() call), therefore potentially, the upper (left) join branch
can be rewritten to index lookups.

Change-Id: I18cfa3875d676f71b26e91433ff101a7e725c890
Reviewed-on: https://asterix-gerrit.ics.uci.edu/488
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Yingyi Bu <buyingyi@gmail.com>