xuzifu666 opened a new pull request, #7273:
URL: https://github.com/apache/paimon/pull/7273
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### Purpose
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Linked issue: close #xxx
The ```trim``` function are frequently used. This PR supports
```trim```/```ltrim```/```rtrim``` functions pushdown in Spark side.
Note the automatic conversion in Spark, as follows:
trim(leading 'abc' from b) => ltrim('abc', b)
trim(tailing 'abc' from b) => rtrim('abc', b)
trim(both 'abc' from b) => trim('abc', b)
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### Tests
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### API and Format
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### Documentation
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