MySQL Bugs: #80642: IF NOT EXISTS or similar for INSTALL PLUGIN

Bug #80642	IF NOT EXISTS or similar for INSTALL PLUGIN
Submitted:	7 Mar 2016 10:33	Modified:	8 Jun 2016 8:40
Reporter:	Lars Tangvald	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Errors	Severity:	S4 (Feature request)
Version:	5.7.11	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
INSTALL PLUGIN throws an error if the plugin already exists. This is expected behavior, but it will halt execution of queries. 
This requires fairly ugly workarounds when doing script automation of the server, for instance in the install scripts of Debian/Ubuntu packages.

Being able to run something like INSTALL PLUGIN IF NOT EXISTS would be helpful for this.

How to repeat:
Try to install the same plugin twice, e.g.:
  INSTALL PLUGIN auth_socket soname 'auth_socket.so';