使用适当的布尔值将 psql 结果导出到 csv

Question

I am currently obtaining a csv string from psql using copyManager in a java service.

String selectQuery = "SELECT * FROM table";
copyManager.copyOut("COPY (" + selectQuery + ") TO STDOUT WITH CSV HEADER", csaString);

But in the resulting string, all boolean values are as 't'/'f' . How do I get the boolean values as 'true' or 'false' . Is there some configuration I can provide to do this?

This table has a lot of columns, so if I used a case to change it, I will also have to specify all the other columns which I want to avoid.

Answer 1

there's no configuration for that I'm afraid. The best you could do is casting boolean columns as text. You will have to list columns of course...

example:

db=# select *,is_dst::text from pg_timezone_names limit 1;
      name      | abbrev | utc_offset | is_dst | is_dst
----------------+--------+------------+--------+--------
 Africa/Abidjan | GMT    | 00:00:00   | f      | false
(1 row)

Here are Toms thoughts on it