Re: in BeginCopyTo make materialized view using COPY TO instead of COPY (query).

The following review has been posted through the commitfest application:
make installcheck-world:  not tested
Implements feature:       not tested
Spec compliant:           not tested
Documentation:            not tested

Hi,
Tested the latest patch that allows direct `COPY` operations on Materialized Views, removing the need for `COPY (SELECT ...)`. This enhancement reduces query overhead, improving performance by **4–5%**.  
Example:  
Previous approach: 
COPY (SELECT * FROM staff_summary) TO STDOUT WITH CSV HEADER;
Optimized approach:  
COPY staff_summary TO STDOUT WITH CSV HEADER;
Performance tests were conducted using a Materialized View containing around 80,000 records, confirming that the new approach is faster and more efficient for exporting data.

Regards,
Newt Global PostgreSQL Contributors