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WITH fake_pg_stat_activity (client_addr) AS ( SELECT inet '172.24.12.20' UNION ALL SELECT inet '192.168.0.1' ) SELECT *, CASE WHEN client_addr << '172.24.12/24' THEN TRUE ELSE FALSE END AS belongs_to_subnet FROM fake_pg_stat_activity;
client_addr
belongs_to_subnet
172.24.12.20
t
192.168.0.1
f
SELECT 2