airborne12 opened a new pull request, #64343:
URL: https://github.com/apache/doris/pull/64343

   ### What problem does this PR solve?
   
   Issue Number: DORIS-19296
   
   Related PR: None
   
   Problem Summary:
   
   Creating an NGRAM_BF index with multiple columns passed FE validation and 
could reach BE tablet creation, where tablet metadata expects each NGRAM_BF 
index to bind exactly one column. This rejects invalid multi-column NGRAM_BF 
definitions during FE analysis for both inline table indexes and CREATE INDEX.
   
   ### Release note
   
   Reject invalid multi-column NGRAM_BF index definitions during DDL analysis.
   
   ### Check List (For Author)
   
   - Test <!-- At least one of them must be included. -->
       - [ ] Regression test
           - Added coverage in 
`regression-test/suites/index_p0/test_ngram_bloomfilter_index.groovy` for 
inline table index and CREATE INDEX paths. Not run locally because no worktree 
Doris cluster was started.
       - [x] Unit Test
           - `./run-fe-ut.sh --run 
org.apache.doris.nereids.trees.plans.commands.IndexDefinitionTest`
       - [x] Manual test (add detailed scripts or steps below)
           - `./build.sh --fe`
       - [ ] 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. Invalid multi-column NGRAM_BF index definitions now fail 
during FE analysis.
   
   - Does this need documentation?
       - [x] 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 -->
   


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