rizaon commented on pull request #1025:
URL: https://github.com/apache/orc/pull/1025#issuecomment-1024540562
Hello @guiyanakuang, thanks for your feedback!
Does it help if I add parameters to specify the tag and value json-key?
Maybe, `--union_tag` and `--union_key` like this?
```
java -jar ./java/tools/target/orc-tools-1.8.0-SNAPSHOT-uber.jar convert -o
sample.orc \
-s "struct<foo:uniontype<int,string>>" --union_tag="tag"
--union_value="value" sample.json
```
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