HJK181 edited a comment on issue #7262:
URL: https://github.com/apache/pinot/issues/7262#issuecomment-898216662
Oh one more point,
what I also was not able to accomplish is using the default value for my
date time field. I tried
```
"transformFunction": "Groovy({mappingTime == -1 ? 0 : mappingTime},
mappingTime)"
```
resulting in
```
java.lang.IllegalStateException: Invalid segment start/end time:
-292275055-05-16T16:47:04.192Z/-292275055-05-16T16:47:04.192Z (in millis:
-9223372036854775808/-9223372036854775808) for time column: mappingTs, must be
between: 1971-01-01T00:00:00.000Z/2071-01-01T00:00:00.000Z
```
According to the docs, the default value for timestamp fields is `TIMESTAMP
0 (1970-01-01 00:00:00 UTC)`
In my initial configuration I've set the dataType of the timestamp to LONG
as per
[docs](https://docs.pinot.apache.org/configuration-reference/schema#datetimefieldspec)
> Data type of the date time column. Can be STRING, INT, LONG
But in contrast I saw that there might be also `TIMESTAMP` as a valid data
type as per the [github
example](https://github.com/apache/pinot/blob/master/pinot-tools/src/main/resources/examples/batch/githubEvents/githubEvents_offline_complexTypeHandling_schema.json#L58)
So I'm confused whats the proper data type.
When I try TIMESTAMP I do get
```
java.lang.IllegalStateException: Invalid segment start/end time:
1970-01-01T00:00:00.000Z/1970-01-01T00:00:00.000Z (in millis: 0/0) for time
column: mappingTs, must be between:
1971-01-01T00:00:00.000Z/2071-01-01T00:00:00.000Z
```
all the time.
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