morningman opened a new pull request #5475:
URL: https://github.com/apache/incubator-doris/pull/5475


   ## Proposed changes
   
   Add command:
   1. EXPLAIN GRAPGH SELECT ...
   2. SHOW QUERY PROFILE "..."
   
   Document will be added in next PR.
   Details can be seem in #5474 
   
   ## Types of changes
   
   - [x] New feature (non-breaking change which adds functionality)
   
   ## Other
   
   I introduced a tree printer class from 
https://github.com/davidsusu/tree-printer
   This is a greet tree printer, but it release version has a NPE bug.
   So I can't just add maven dependency of it, but has to add all its source 
codes in
   our repo and fix the bug.
   
   I will also send a PR to `davidsusu/tree-printer`, and once it merged and 
release a new version.
   I will remove the source code of the tree printer in Doris and use its maven 
dependency.
   


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