vertica/Vertica-Extension-Packages — pull request #10 by bvandiver (2011-12-15 21:23:15+00:00)
Title: Shell Extensions

The Shell extension package provides a mechanism to execute shell
commands from within Vertica and retrieve the results as a collection
of rows. Be aware: executing shell commands (as the same user as the
vertica process!) is a loaded gun and should be used with care. The
Shell package can be used for collecting diagnostics, launching
database-external processing, or database administration. By
correctly formulating the query that invokes the Shell function,
processes can be spawned on any subset of nodes in the cluster.

+ String Extension, group_concat