Your State Pension (COAP) is based on your total PRSI record, some or all of which may be based on public service employment).
If your total PRSI record amounts to 7 complete years then (under the Total Contribution Approach) your State Pension would be 7/40 of the maximum State Pension. You also get a PS Occupational Pension based on your 7 years service in the Single Scheme.
If in addition to the 7 years in the PS Single Scheme you have another 25 years paid or credited, then your State Pension would be 32/40 of maximum. Your PS Occupational Pension would be the same - based on 7 years service in the Single Scheme.