alamb commented on code in PR #5906:
URL: https://github.com/apache/arrow-datafusion/pull/5906#discussion_r1160626335
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datafusion/expr/src/function.rs:
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@@ -262,6 +262,25 @@ pub fn return_type(
BuiltinScalarFunction::ArrowTypeof => Ok(DataType::Utf8),
+ BuiltinScalarFunction::WithTimezone => match input_expr_types[0] {
+ DataType::Timestamp(TimeUnit::Nanosecond, _) => {
+ Ok(DataType::Timestamp(TimeUnit::Nanosecond, None))
+ }
+ DataType::Timestamp(TimeUnit::Microsecond, _) => {
+ Ok(DataType::Timestamp(TimeUnit::Microsecond, None))
+ }
+ DataType::Timestamp(TimeUnit::Millisecond, _) => {
+ Ok(DataType::Timestamp(TimeUnit::Millisecond, None))
+ }
+ DataType::Timestamp(TimeUnit::Second, _) => {
+ Ok(DataType::Timestamp(TimeUnit::Second, None))
+ }
+ _ => return Err(DataFusionError::Internal(
+ "The with_timezone function can only accept timestamp as the
first arg."
+ .to_string(),
+ )),
+ },
Review Comment:
I think you may need to special case it, in the same way as `arrow_cast`:
https://github.com/apache/arrow-datafusion/blob/f00ef9d5484039dc7013af5b8fa04f7b29ffaba7/datafusion/sql/src/expr/function.rs#L139-L142
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