tree 55543f445371a176aeaa9c25897e927f8b67dfe2
parent 3b0e42c2305df398c1ab570b044a2895b212c1c1
author Xikui Wang <xkkwww@gmail.com> 1527901937 -0700
committer Xikui Wang <xkkwww@gmail.com> 1528136213 -0700

[ASTERIXDB-2375][RT] Evaluate constant experession in SELECT only once

- user model changes: none
- storage format changes: none
- interface changes: new method added to ComparisonHelper to handle
cached value.

Currently, in datascan case, the constant value is evaluated on per
tuple bases. We could cache the value to avoid the deserialization of
the constant value each time.

Change-Id: Iae4e78928da2bd63b2984b3624b88baed9b7cd73
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2621
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Dmitry Lychagin <dmitry.lychagin@couchbase.com>