kamctl: new command 'db showg'

- uses \G at end of sql query, resulting in line-formated output (at
  least for mysql)

utils/kamctl/kamctl

@@ -983,6 +983,15 @@ db_ops() {
 			QUERY="select * FROM $1;"
 			$DBROCMD "$QUERY"
 			;;
+		showg)
+			shift
+			if [ $# -ne 1 ] ; then
+				merr "missing table parameter"
+				exit 1
+			fi
+			QUERY="select * FROM $1\\G;"
+			$DBROCMD "$QUERY"
+			;;
 		*)
 			usage_db_ops
 			exit 1

utils/kamctl/kamctl.sqlbase

@@ -60,6 +60,7 @@ cat <<EOF
  db rorun <id> ....................... execute read-only SQL query from 
                                        \$id variable
  db show <table> ..................... display table content
+ db showg <table> .................... display formatted table content
 EOF
 }
 USAGE_FUNCTIONS="$USAGE_FUNCTIONS usage_db_ops"