enenuki opened a new issue #9992:
URL: https://github.com/apache/druid/issues/9992
### Description
We would like to see several useful functions available in transformation
expressions. These functions
should not be very complex to add but certainly have some added value:
1. Current system timestamp: while there are different timestamp parsing
functions available, this function seem to be missing.
2. Hash(code) function: Ability to create a hash from a field, subset of
fields or all fields would be nice
### Motivation
Primary motivation for this both of these functions is generation of unique
ID field as transformation expression during ingestion time. Maybe there is
better way to achieve this?
Thanks!
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