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We already had a psql variable VERSION that shows the verbose form of psql's own version. Add VERSION_NAME to show the short form (e.g., "11devel") and VERSION_NUM to show the numeric form (e.g., 110000). Also add SERVER_VERSION_NAME and SERVER_VERSION_NUM to show the short and numeric forms of the server's version. (We'd probably add SERVER_VERSION with the verbose string if it were readily available; but adding another network round trip to get it seems too expensive.) The numeric forms, in particular, are expected to be useful for scripting purposes, now that psql can do conditional tests. Back-patch of commit 9ae9d8c1549c384dbdb8363e1d932b7311d25c56. Fabien Coelho, reviewed by Pavel Stehule Discussion: https://postgr.es/m/alpine.DEB.2.20.1704020917220.4632@lancre