ViggoC

Speed up date_trunc function

1

`date_trunc` function is not very efficient now, when timezone is not considered, the length of a day/hour/minute is fixed. So we can speed up the `date_trunc` function for day/hour/minute unit...

GH-44332: [Java] Implement VectorAppender for BaseVariableWidthViewVector

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fix #44332 * GitHub Issue: #44332

### Describe the enhancement requested Implement `VectorAppender` for BaseVariableWidthViewVector ### Component(s) Java

### Description ``` let res = returns_unit(); returns_result(res).unwrap(); println!("The result is {res:?}"); ``` The suggestion of above code is ``` help: omit the `let` binding and replace variable usages with...

[Data] unique aggregation considers ignore_nulls

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## Description unique aggregation considers ignore_nulls ## Related issues Fixes #59032