rluvaton opened a new pull request, #18203:
URL: https://github.com/apache/datafusion/pull/18203
## Which issue does this PR close?
N/A
But extracted from:
- #18183
## Rationale for this change
I want to add optimization for lookup based `CASE WHEN` like:
```sql
CASE company
WHEN 1 THEN 'Apple'
WHEN 5 THEN 'Samsung'
WHEN 2 THEN 'Motorola'
WHEN 3 THEN 'LG'
ELSE 'Other'
END
```
## What changes are included in this PR?
Added multiple benchmarks for testing lookup table from int to string and
vice verca
with different size of lookup table (5, 10, 20), different probabilities for
having values generated to exist in the lookup map, and probabilities for the
number of nulls
## Are these changes tested?
N/A
## Are there any user-facing changes?
nope
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