tree e5eb8bd3f8f3118e87e1fe49f54c35950500e03c
parent d86e7cbb924b68f76174a75ac4cdd7e5a749938e
author Xikui Wang <xkkwww@gmail.com> 1597960520 -0700
committer Xikui Wang <xkkwww@gmail.com> 1597968607 +0000

[NO ISSUE] Adding more extension APIs

- user model changes: no
- storage format changes: no
- interface changes: yes

Details:
1. Allow extensions to override LangExpressionToPlanTranslator to
tranlsate insert/upsert/delete.
2. Reuse the current statement executor in feed if possible to make sure
extensions' translator can be used properly.
3. Add new methods in MetadataProvider so that extensions could override
them to use customized LSM runtime operators.
4. Add new operational interface in LSM runtime to allow extensions to
modify data before persistence.

Change-Id: Iada557f15af9de6fbdb6f6d4e41c0266c1d3fbff
Reviewed-on: https://asterix-gerrit.ics.uci.edu/c/asterixdb/+/7643
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Xikui Wang <xkkwww@gmail.com>