deemoliu opened a new pull request, #13572:
URL: https://github.com/apache/pinot/pull/13572
`bugfix``release-notes`
Context:
Customer reached to out to differentiate the multi-value column values:
"null value" and "empty list".
Currently both of "null value" and "empty list" are recognized as null and
populated with the default null value of the empty list. For example,
```
{
"type": [
"null",
{
"items": "string",
"type": "array"
}
],
"name": "multiple_ids",
"default": null,
"doc": "multi-value testing field"
},
```
the decoder it treats null & empty -> ["null"]
In this PR, we introduced a config called "differentiateNullAndEmptyForMV"
in `AvroRecordExtractorConfig` to differentiate these two values.
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