[Answer Query Using Materialized Views] Support LIMIT/OFFSET/FETCH clause on origin query.

[avamingli]

If origin query has LIMIT clause, we could process it on view query.
We could process FETCH too as ORDER BY is supported on origin query.

create incremental materialized view mv as
  select c1 as mc1, c2 as mc2, c3 as mc3, c4 as mc4
  from t1 where c1 > 90;

Origin querys:

  select c2 from t1 where c1 > 90 limit 3 offset 4;
  select c2 from t1 where c1 > 90 order by c3, c4
    fetch first 3 rows with ties;

Could be rewritten to:

  select mc2 from mv order by mc1 limit 3 offset 4;
  select mc2 from mv order by mc3, mc4
    fetch first 3 rows with ties;

See more cases in tests.

Authored-by: Zhang Mingli avamingli@gmail.com

fix #ISSUE_Number

---

Change logs

Describe your change clearly, including what problem is being solved or what feature is being added.

If it has some breaking backward or forward compatibility, please clary.

Why are the changes needed?

Describe why the changes are necessary.

Does this PR introduce any user-facing change?

If yes, please clarify the previous behavior and the change this PR proposes.

How was this patch tested?

Please detail how the changes were tested, including manual tests and any relevant unit or integration tests.

Contributor's Checklist

Here are some reminders and checklists before/when submitting your pull request, please check them:

• Make sure your Pull Request has a clear title and commit message. You can take git-commit template as a reference.
• Sign the Contributor License Agreement as prompted for your first-time contribution(One-time setup).
• Learn the coding contribution guide, including our code conventions, workflow and more.
• List your communication in the GitHub Issues or Discussions (if has or needed).
• Document changes.
• Add tests for the change
• Pass make installcheck
• Pass make -C src/test installcheck-cbdb-parallel
• Feel free to request cloudberrydb/dev team for review and approval when your PR is ready🥳