vinlee19 opened a new pull request, #55051: URL: https://github.com/apache/doris/pull/55051
### What problem does this PR solve? In PR https://github.com/apache/doris/pull/49623, we implemented conversion from Paimon `VARCHAR/CHAR` types to Doris `VARCHAR/CHAR` types. However, there are significant differences in the maximum length constraints between these systems: **Apache Paimon:** - `CHAR` : Fixed-length character string declared using CHAR(n) where n is the number of code points. n must have a value between `1` and `2,147,483,647` (inclusive). Defaults to n=1 if no length is specified. - `VARCHAR`: Variable-length character string declared using VARCHAR(n) where n is the maximum number of code points. n must have a value between `1` and `2,147,483,647` (inclusive). Defaults to n=1 if no length is specified. **Apache Doris:** - `CHAR `: Maximum length is `255` characters - `VARCHAR` : Maximum length is `65,533` characters **Solution:** This PR addresses the length constraint mismatch by automatically converting oversized Paimon VARCHAR/CHAR types to Doris STRING type when they exceed Doris limits: - Paimon `VARCHAR` with length > 65,533 → Doris `STRING` - Paimon `CHAR` with length > 255 → Doris `STRING` This ensures compatibility while preserving data integrity during type mapping from Paimon to Doris. 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: - [ ] No. - [x] Yes. <!-- Explain the behavior change --> - Does this need documentation? - [ ] No. - [ ] 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 --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
