### _Why are the changes needed?_
Support macros in Row-filter condition expression, introduced in Ranger 2.3 ([release notes](https://cwiki.apache.org/confluence/display/RANGER/Apache+Ranger+2.3.0+-+Release+Notes)), is an major feature to significantly simplify the row-filter condition expression in practice by replacing explicit condition query by using user/group's attributes.
- [RANGER-3605](https://issues.apache.org/jira/browse/RANGER-3605) : Support macros in row-filter/condition expressions
- [RANGER-3550](https://issues.apache.org/jira/browse/RANGER-3550) : support for using user/tag attributes in row-filter expressions and conditions
Consider user liangtiancheng with attribute born_city = guangzhou, we can define the row filter condition with city='${{USER.born_city}}' with the macro feature.
However, This feature implicit relies on an config named `ranger.plugin.spark.enable.implicit.userstore.enricher` and the default value false will prevent RangerUserStoreEnricher fetching user/group and their attributes. Macros in row-filter condition will fallback to null value (as lack of user attributes value in UserStore of auth context) in script transformation unexpectedly and imperceptibly.
Improving doc of ranger-spark-security.xml to aware of this feature and related config.
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#3267 from bowenliang123/doc-ranger-macros.
Closes#3217
aee4b201 [liangbowen] plain text
a7ec3bc9 [liangbowen] update docs and clearify difference between ranger.plugin.hive.policy.cache.dir and ranger.plugin.spark.policy.cache.dir configs
4887bd1f [liangbowen] simplify with "row filter expressions"
fa62402f [liangbowen] skip list items
9dd1cd4c [liangbowen] h5. Using Marcos in Row Level Filters
849bed5b [liangbowen] add docs for Additional configs for using Marcos in row-level filter
Authored-by: liangbowen <liangbowen@gf.com.cn>
Signed-off-by: Kent Yao <yao@apache.org>
6b34898510