How do I copy an element of composite type array into csv file?

["David G. Johnston" <david.g.johnston@xxxxxxxxx>]

On Wednesday, May 23, 2018, a <372660931@xxxxxx> wrote:

Thank you very much.

BTW, may I ask if I would like to do the opposite that copy csv file content into the first element, how should I do it??

COPY B(Ay[1])
from 'E:/products_199.csv'  DELIMITER ',' CSV HEADER;

you cannot put "[1]" there.  The csv file value has to be an array input literal with only one element. i.e., something like: {(1,2)}

There is no first element as such when you are creating a new record.  There will be however many elelements to supply to the array input.

David J.