if [ -d /opt/app/postgresql-9.5.2 ]
then PGDIR=/opt/app/postgresql-9.5.2
elif [ -d /usr/lib/postgresql/9.6 ]
then PGDIR=/usr/lib/postgresql/9.6
elif [ -d /usr/lib/postgresql/9.5 ]
then PGDIR=/usr/lib/postgresql/9.5
else echo PostgreSQL bin directory not found
fi
export PATH="$PGDIR/bin:/opt/app/cdf/bin:/opt/app/pgaas/bin:$PATH"