jiangzhx opened a new pull request, #7096:
URL: https://github.com/apache/arrow-datafusion/pull/7096
# Which issue does this PR close?
Closes #7094 .
# Rationale for this change
For someone who is new to DataFusion and is trying to write a custom UDAF,
it may be a little confusing to understand why create_udaf only takes one
DataType for the input_type. Additionally, I did not find any examples
demonstrating how to create a UDAF with multiple input arguments.
# What changes are included in this PR?
change `input_type: DataType` to `input_type: Vec<DataType>`
```
pub fn create_udaf(
name: &str,
return_type: Arc<DataType>,
volatility: Volatility,
accumulator: AccumulatorFactoryFunction,
state_type: Arc<Vec<DataType>>,
) -> AggregateUDF {
```
# Are these changes tested?
Yes
# Are there any user-facing changes?
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yes
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