ORCA: allow partition table use the append node #1022
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
Run CI with After that, i will added the test and set |
jiaqizho
force-pushed
the
add-append-back
branch
from
c0a35b8 to
bc48672
Compare
jiaqizho
force-pushed
the
add-append-back
branch
4 times, most recently
from
716e7f8 to
ca8ea07
Compare
jiaqizho
force-pushed
the
add-append-back
branch
from
ca8ea07 to
09e7020
Compare
jiaqizho
changed the title
In ORCA, both Dynamic Scan and Append operators can serve as scan methods for partitioned tables. Historically, ORCA initially supported the Append operator before switching to Dynamic Any Scan, with several iterations of changes in between. In current CBDB versions, Dynamic Scan is the default partitioned table scan operator. However, the vectorized executor in CBDB (closed-source) cannot support Dynamic Scan due to its multi-threaded architecture, which prohibits metadata reading during scanning. This commit reintroduces the Append operator as an alternative. The GUC `optimizer_disable_dynamic_table_scan` (default: off) now allows choosing between Dynamic Scan and Append operators. Important considerations when using Append operator: 1. **Row-level security unsupported on root partition table**: Append cannot be used with row-level security on partitioned tables. ORCA applies row-level security at the final stage, making it impossible to determine the root partition after generating Append plans. Dynamic Scan preserves root partition information, enabling runtime application of row-level security to child partitions. 2. **No index-only scan support**: This is a CBDB executor limitation. Only Dynamic Scan supports index-only scans for partitioned tables.
jiaqizho
force-pushed
the
add-append-back
branch
from
09e7020 to
d510d0e
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Fixes #ISSUE_Number
What does this PR do?
Type of Change
Breaking Changes
Test Plan
make installcheckmake -C src/test installcheck-cbdb-parallelImpact
Performance:
User-facing changes:
Dependencies:
Checklist
Additional Context
CI Skip Instructions