tree 8450006ce514acde8413ca08c8066ca7f655f052
parent 95079f2521f456a797d391555d2c3fa0f4738b96
author Yingyi Bu <yingyi@couchbase.com> 1483387050 -0800
committer Yingyi Bu <buyingyi@gmail.com> 1483462121 -0800

ASTERIXDB-1650: fix undefined variable reference resolution.

The order of resolving a reference to an undefined variable is:
-- If the reference to an undefined variable is the binding expression for FROM/JOIN/UNNEST/Quantifier,
   then it can only be resolved to a dataset;
-- Otherwise, it is firstly resolved as a field-access. If the system couldn't find a candidate
   field access, it is then resolved to a dataset.

Change-Id: I24e4c1b38e53c97380cfb3e2e9b61cdd05fe7002
Reviewed-on: https://asterix-gerrit.ics.uci.edu/1408
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
BAD: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>