--- a/bash-completion.sh	Wed Dec 30 01:37:41 2020 +0100
+++ b/bash-completion.sh	Wed Dec 30 09:58:39 2020 +0100
@@ -53,7 +53,7 @@
 	)
 
 
-	if   [[ "$w1" == "--relation"                      && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	if   [[ "$w1" == "--relation"                      && "x$w0" == "x" ]];    then COMPREPLY=("'.*'")
 	elif [[ "$w1" == "--where"                         && "x$w0" == "x" ]];    then COMPREPLY=("''")
 	elif [[ "$w1" == "--xml-attribute"                 && "x$w0" == "x" ]];    then COMPREPLY=("''")
 	elif [[ "$w1" == "--output-attribute"              && "x$w0" == "x" ]];    then COMPREPLY=("''")