Github user ChinmaySKulkarni commented on the issue:
https://github.com/apache/phoenix/pull/406
Once flipped back to "false", setting this flag back to "true" may not
cleanly rollback since SYSCAT may have split since then. Let's add a comment
about that as well as the SYSTEM.CHILD_LINK metadata that we discussed.
Otherwise +1. Thanks @twdsilva ---
