vinlee19 opened a new pull request, #52598:
URL: https://github.com/apache/doris/pull/52598
This PR adds support for querying Apache Paimon system tables, enabling
users to inspect metadata and operational information about Paimon tables
directly through SQL queries.
For complete system table reference and advanced usage patterns, see the
[Apache Paimon System Tables
Documentation](https://paimon.apache.org/docs/master/concepts/system-tables/).
## Usage Examples
### Basic System Table Query
```sql
-- Query snapshot information
SELECT * FROM my_table$snapshots;
```
```sql
-- Query manifest details
SELECT * FROM my_table$manifests;
```
```sql
-- Query schema evolution
SELECT * FROM my_table$schemas;
```
### Advanced Operations
```sql
-- Filter snapshots by commit time
SELECT snapshot_id, commit_user, commit_time
FROM my_table$snapshots
WHERE commit_time > '2025-01-01'
ORDER BY commit_time DESC;
```
```sql
-- Join snapshots with schemas
SELECT s.snapshot_id, sc.fields
FROM my_table$snapshots s
JOIN my_table$schemas sc ON s.schema_id = sc.schema_id;
```
Sample Output
```sql
mysql> SELECT * FROM my_table$snapshots;
+-------------+-----------+--------------------------------------+---------------------+-------------+-------------------------+------------------------------------------------------+------------------------------------------------------+-------------------------+--------------------+--------------------+------------------------+----------------------+
| snapshot_id | schema_id | commit_user |
commit_identifier | commit_kind | commit_time |
base_manifest_list | delta_manifest_list
| changelog_manifest_list | total_record_count |
delta_record_count | changelog_record_count | watermark |
+-------------+-----------+--------------------------------------+---------------------+-------------+-------------------------+------------------------------------------------------+------------------------------------------------------+-------------------------+--------------------+--------------------+------------------------+----------------------+
| 1 | 0 | d7ea4996-92c7-469f-b9ff-c76525954f1c |
9223372036854775807 | APPEND | 2025-03-04 22:48:45.575 |
manifest-list-dc5490ba-420c-445a-b6f7-6962d394935c-0 |
manifest-list-dc5490ba-420c-445a-b6f7-6962d394935c-1 | NULL
| 1 | 1 | 0 |
-9223372036854775808 |
+-------------+-----------+--------------------------------------+---------------------+-------------+-------------------------+------------------------------------------------------+------------------------------------------------------+-------------------------+--------------------+--------------------+------------------------+----------------------+
```
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [x] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [x] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [x] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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