commit 616745c6c2c1f96446cebed7dbadd6f6307c7817
Author: Ian Barwick <ian@2ndquadrant.com>
Date:   Fri Aug 30 13:45:24 2019 +0900

    psql: add tab completion for \df slash commands
    
    "\df" itself was listed for tab completion, but none of the
    possible suffixes were.

diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index d6988f2654..9c8a18ab48 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -870,7 +870,8 @@ psql_completion(const char *text, int start, int end)
 
 	static const char *const backslash_commands[] = {
 		"\\a", "\\connect", "\\conninfo", "\\C", "\\cd", "\\copy", "\\copyright",
-		"\\d", "\\da", "\\db", "\\dc", "\\dC", "\\dd", "\\dD", "\\des", "\\det", "\\deu", "\\dew", "\\df",
+		"\\d", "\\da", "\\db", "\\dc", "\\dC", "\\dd", "\\dD", "\\des", "\\det", "\\deu", "\\dew",
+		"\\df", "\\dfa", "\\dfn", "\\dfp", "\\dft", "\\dfw",
 		"\\dF", "\\dFd", "\\dFp", "\\dFt", "\\dg", "\\di", "\\dl", "\\dL",
 		"\\dn", "\\do", "\\dp", "\\drds", "\\ds", "\\dS", "\\dt", "\\dT", "\\dv", "\\du", "\\dx",
 		"\\e", "\\echo", "\\ef", "\\encoding",