BUG #17645: Strange queries that stuck in database system

The following bug has been logged on the website:

Bug reference:      17645
Logged by:          Thien, Phan Phuoc
Email address:      thien.phan@apollo.edu.vn
PostgreSQL version: 14.0
Operating system:   Windows Server 2012 R2
Description:

Hi,

When I run this query

SELECT  NOW() - query_start AS elapsed, pid, client_addr, query,
query_start, *
FROM pg_stat_activity
WHERE query != '<IDLE>'  AND query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start DESc;

I noticed that there are many queries (as below) that create many Windows
processes and CPU is 100%. Is it a bug? Please help!
Thank you very much!
Thien Phan

-- Load field definitions for (free-standing) composite types

    SELECT typ.oid, att.attname, att.atttypid

    FROM pg_type AS typ

    JOIN pg_namespace AS ns ON (ns.oid = typ.typnamespace)

    JOIN pg_class AS cls ON (cls.oid = typ.typrelid)

    JOIN pg_attribute AS att ON (att.attrelid = typ.typrelid)

    WHERE

      (typ.typtype = 'c' AND cls.relkind='c') AND

      attnum > 0 AND     -- Don't load system attributes

      NOT attisdropped

    ORDER BY typ.oid, att.attnum
2022-10-17 00:01:21.117 +07 [[unknown]][4800][apollo_portal] FATAL:
terminating connection due to administrator command
2022-10-17 00:01:21.117 +07 [[unknown]][4800][apollo_portal] STATEMENT:  --
Load field definitions for (free-standing) composite types

    SELECT typ.oid, att.attname, att.atttypid

    FROM pg_type AS typ

    JOIN pg_namespace AS ns ON (ns.oid = typ.typnamespace)

    JOIN pg_class AS cls ON (cls.oid = typ.typrelid)

    JOIN pg_attribute AS att ON (att.attrelid = typ.typrelid)

    WHERE

      (typ.typtype = 'c' AND cls.relkind='c') AND

      attnum > 0 AND     -- Don't load system attributes

      NOT attisdropped

    ORDER BY typ.oid, att.attnum
2022-10-17 00:01:21.118 +07 [[unknown]][6340][apollo_portal] LOG:  could not
send data to client: An established connection was aborted by the software
in your host machine.

    
2022-10-17 00:01:21.118 +07 [[unknown]][6340][apollo_portal] STATEMENT:  --
Load field definitions for (free-standing) composite types

    SELECT typ.oid, att.attname, att.atttypid

    FROM pg_type AS typ

    JOIN pg_namespace AS ns ON (ns.oid = typ.typnamespace)

    JOIN pg_class AS cls ON (cls.oid = typ.typrelid)

    JOIN pg_attribute AS att ON (att.attrelid = typ.typrelid)

    WHERE

      (typ.typtype = 'c' AND cls.relkind='c') AND

      attnum > 0 AND     -- Don't load system attributes

      NOT attisdropped

    ORDER BY typ.oid, att.attnum