AIX PostgreSQL client manual installation

Download and install these packages (get libgcc for your AIX version): Install them (in case of any dependecy issue use "--nodeps" rpm option ) 
# rpm -Uvh libgcc-*.ppc.rpm
# rpm -Uvh openldap-2.4.46-1.aix6.1.ppc.rpm cyrus-sasl-2.1.26-3.aix6.1.ppc.rpm
# rpm -Uvh tcl-8.6.8-1.aix6.1.ppc.rpm
# rpm -i postgresql-libs-10.5-1.aix6.1.ppc.rpm --nodeps
# rpm -i perl-DBI-1.623-1.aix5.1.ppc.rpm
# rpm -i perl-DBD-Pg-3.7-4.ppc.rpm