How do I copy an element of composite type array into csv file? - Mailing list pgsql-general

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Subject How do I copy an element of composite type array into csv file?
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Msg-id tencent_428C1F5C4640DDCF140B725F@qq.com
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Responses Re: How do I copy an element of composite type array into csv file?
List pgsql-general
Hi suppose I have composite type and table

create type A as(
    x float8,
    y float8
);

create table B(
    Ay A[]
);

insert into B
values(array[
    (1,2)::A,
    (3,4)::B]
);

Now I would like to export the first element of table B into an csv file:

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

The code above reported an syntax error.

How should I do it??

Thank you so much!

Shore

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