#!/bin/sh
poll_sec=15
imax=`expr 10000 / ${poll_sec}`
if [ $# -ge 1 ]; then
    imax=$1
fi

echo "LISTEN first;"
echo "LISTEN second;"

i=0
while [ $i -lt $imax ]; do

    echo "SELECT pg_sleep(${poll_sec});"

    i=`expr $i + 1`
done