  when i see the source codes in the bin directory,i find some very interesting codes:
cat <<EOF
\.
    INSERT INTO pg_description SELECT \
 t.objoid, c.oid, t.objsubid, t.description \
    FROM tmp_pg_description t, pg_class c WHERE c.relname = t.classname;
EOF
) \
 | "$PGPATH"/postgres $PGSQL_OPT template1 > /dev/null || exit_nicely
echo "ok"
There is "\." and when i delete the dot following the '\',i still can run this shell.I am afraid
if it is not necessary here??

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