tree 6f9977672090f76dfa24cd6c964ba7c0ef9379f4
parent f23d86e98f7b307ac5e745fbd08835ebcb11b801
author Yingyi Bu <yingyi@couchbase.com> 1469515039 -0700
committer Yingyi Bu <buyingyi@gmail.com> 1469568119 -0700

Support CASE expression in SQL++.

- support both simple CASE expression and searched CASE expression;
- support heterogenous return types of a CASE expression;
- remove IfElseExpression in SQL++;
- remove IfElseToSwitchCaseFunctionRule.java since the plan pattern it tries to identify is no longer right;
- unify CastRecordDescriptor and CastListDescriptor into CastTypeDescriptor;
- fix IS NULL for the case that the input is MISSING;
- let CastTypeDescriptor have a generated runtime so as to handle NULL/MISSING correctly.

Change-Id: Id9de7c3df70be43456e38a61ce767cc14f09e661
Reviewed-on: https://asterix-gerrit.ics.uci.edu/1015
Reviewed-by: Till Westmann <tillw@apache.org>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>