waitingkuo commented on code in PR #2939:
URL: https://github.com/apache/arrow-rs/pull/2939#discussion_r1007742288
##########
arrow/src/util/display.rs:
##########
@@ -190,14 +191,37 @@ macro_rules! make_string_datetime {
} else {
array
.value_as_datetime($row)
- .map(|d| d.to_string())
+ .map(|d| format!("{:?}", d))
.unwrap_or_else(|| "ERROR CONVERTING DATE".to_string())
};
Ok(s)
}};
}
+macro_rules! make_string_datetime_with_tz {
+ ($array_type:ty, $tz_string: ident, $column: ident, $row: ident) => {{
+ let array = $column.as_any().downcast_ref::<$array_type>().unwrap();
+
+ let s = if array.is_null($row) {
+ "".to_string()
+ } else {
+ match $tz_string.parse::<Tz>() {
+ Ok(tz) => array
+ .value_as_datetime_with_tz($row, tz)
+ .map(|d| format!("{}", d.to_rfc3339()))
+ .unwrap_or_else(|| "ERROR CONVERTING DATE".to_string()),
+ Err(_) => array
+ .value_as_datetime($row)
+ .map(|d| format!("{:?} (Unknown Time Zone '{}')", d,
$tz_string))
Review Comment:
the logic behind is:
while parsing TZ failed, parse datetime only
1. if it works, show the datetime part with a unknown time zone warning
```bash
+--------------------------------------------------------+
| Timestamp(Second, Some("Asia/Taipei2")) |
+--------------------------------------------------------+
| 1970-01-01T00:00:00 (Unknown Time Zone 'Asia/Taipei2') |
+--------------------------------------------------------+
```
2. if it doesn't work, display something (similar as `make_string_datetime`)
like this
```bash
+--------------------------------------------------------+
| Timestamp(Second, Some("Asia/Taipei2")) |
+--------------------------------------------------------+
| ERROR CONVERTING DATE |
+--------------------------------------------------------+
```
@alamb @tustvold
I wonder if it's preferred. we could also show followings directly while
failed to parse timezone
```bash
+--------------------------------------------------------+
| Timestamp(Second, Some("Asia/Taipei2")) |
+--------------------------------------------------------+
| Unknown Time Zone 'Asia/Taipei2' |
+--------------------------------------------------------+
```
i agree the logic here is confusing, i should've added some comments here
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