On Thursday, February 17, 2022, PG Doc comments form <nore...@postgresql.org> wrote:
> The following documentation comment has been logged on the website: > > Page: https://www.postgresql.org/docs/14/sql-copy.html > Description: > > The documentation states that headers are only used for CSV files, but > there > is a header "PGCOPY" when using a BINARY export. e.g. > COPY (SELECT zipfile FROM file_upload) TO PROGRAM 'cat > /tmp/dunc ' > (FORMAT > binary); > Please can we have an example of using COPY (server/plpgsql) to copy a > bytea > (eg image) column to an image file, unchanged - i.e. no headers. > To my knowledge there is no such example possible. If you want to export the contents of a bytea to a file you need to do so using client-side code, pulling the data from a normal resultset. This includes using an untrusted language function. David J.
