clintropolis opened a new pull request, #15585:
URL: https://github.com/apache/druid/pull/15585
### Description
WIP
```
SELECT string4, COUNT(*) FROM foo WHERE REGEXP_EXTRACT(string1, '^1') IS NOT
NULL OR REGEXP_EXTRACT('Z' || string2, '^Z2') IS NOT NULL GROUP BY 1
```
before:
```
Benchmark (query) (rowsPerSegment) (schema)
(vectorize) Mode Cnt Score Error Units
SqlExpressionBenchmark.querySql 40 5000000 explicit
false avgt 5 279.224 ± 3.353 ms/op
SqlExpressionBenchmark.querySql 40 5000000 auto
false avgt 5 274.911 ± 5.642 ms/op
```
after:
```
Benchmark (query) (rowsPerSegment) (schema)
(vectorize) Mode Cnt Score Error Units
SqlExpressionBenchmark.querySql 40 5000000 explicit
false avgt 5 194.301 ± 4.236 ms/op
SqlExpressionBenchmark.querySql 40 5000000 auto
false avgt 5 187.447 ± 3.748 ms/op
```
<hr>
This PR has:
- [ ] been self-reviewed.
- [ ] using the [concurrency
checklist](https://github.com/apache/druid/blob/master/dev/code-review/concurrency.md)
(Remove this item if the PR doesn't have any relation to concurrency.)
- [ ] added documentation for new or modified features or behaviors.
- [ ] a release note entry in the PR description.
- [ ] added Javadocs for most classes and all non-trivial methods. Linked
related entities via Javadoc links.
- [ ] added or updated version, license, or notice information in
[licenses.yaml](https://github.com/apache/druid/blob/master/dev/license.md)
- [ ] added comments explaining the "why" and the intent of the code
wherever would not be obvious for an unfamiliar reader.
- [ ] added unit tests or modified existing tests to cover new code paths,
ensuring the threshold for [code
coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md)
is met.
- [ ] added integration tests.
- [ ] been tested in a test Druid cluster.
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