ftp.postgresql.org/pub/repos/yum/12/redhat/rhel-6-i386 :
postgresql12-12.6-2PGDG.rhel6.i686.rpm
postgresql12-contrib-12.6-2PGDG.rhel6.i686.rpm
postgresql12-devel-12.6-2PGDG.rhel6.i686.rpm
postgresql12-docs-12.6-2PGDG.rhel6.i686.rpm
postgresql12-libs-12.6-2PGDG.rhel6.i686.rpm
postgresql12-plperl-12.6-2PGDG.rhel6.i686.rpm
postgresql12-plpython-12.6-2PGDG.rhel6.i686.rpm
postgresql12-pltcl-12.6-2PGDG.rhel6.i686.rpm
postgresql12-server-12.6-2PGDG.rhel6.i686.rpm
postgresql12-test-12.6-2PGDG.rhel6.i686.rpm
topn_12-2.3.1-1.rhel6.i686.rpm