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Posted to commits@pinot.apache.org by "ankitsultana (via GitHub)" <gi...@apache.org> on 2024/12/12 20:23:50 UTC
[I] [feature-request] Support Lambda Expressions [pinot]
ankitsultana opened a new issue, #14650:
URL: https://github.com/apache/pinot/issues/14650
It would be great if Pinot supported Lambda expressions. For a reference point, PrestoSQL has [really rich lambda expression](https://prestodb.io/docs/current/functions/lambda.html) support, where you can even pass in custom functions for sorting an array. Example expressions supported in Presto:
```
SELECT
ARRAY_SORT(
filter(someArrayExpression),
state -> json_extract_scalar(state, '$.source') = 'something'
),
(st1, st2) -> IF(
JSON_EXTRACT_SCALAR(st1, '$.timestamp') < JSON_EXTRACT_SCALAR(st2, '$.timestamp'),
-1,
IF(
JSON_EXTRACT_SCALAR(st1, '$.timestamp') = JSON_EXTRACT_SCALAR(st2, '$.timestamp'),
0,
1
)
)
)
```
Calcite has support for Lambda expressions but I haven't taken a deeper look into this.
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "gortiz (via GitHub)" <gi...@apache.org>.
gortiz commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-2560789042
As @ankitsultana said, this is a complex task that would need a design document. How to evaluate these lambdas in the query engine is not a trivial task that would probably involve several core changes in the engine (including at least extending the function registry).
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "cutiepie-10 (via GitHub)" <gi...@apache.org>.
cutiepie-10 commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-2556469021
Hello @ankitsultana ,
Can you assign this issue to me ?
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] closed issue #14650: [feature-request] Support Lambda Expressions
URL: https://github.com/apache/pinot/issues/14650
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "ankitsultana (via GitHub)" <gi...@apache.org>.
ankitsultana commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-2560409953
@cutiepie-10 : supporting lambda expressions is going to be quite a large effort. Do you have a design doc or a PoC we can take a look at?
If you are new to Pinot I'd recommend picking up smaller starter tasks first.
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-4636654795
This issue has been closed because it has been inactive for 180 days. If you believe this issue is still relevant, please feel free to reopen it or create a new issue. Thank you!
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "cutiepie-10 (via GitHub)" <gi...@apache.org>.
cutiepie-10 commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-2546176642
Hi @ankitsultana,
I would like to contribute on this issue. Could you please help me get more insights on the execution part?
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Re: [I] [feature-request] Support Lambda Expressions [pinot]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on issue #14650:
URL: https://github.com/apache/pinot/issues/14650#issuecomment-4393216300
This issue has been automatically marked as stale because it has not had any activity in the last 150 days. It will be closed in 30 days if no further activity occurs. If this issue is still relevant, please leave a comment to keep it open. Thank you for your contributions!
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