Larry McGhaw wrote:
4) libpq **cannot** describe the maximum internal data size of a char or
varchar constant!
Example:  select '123' from <any table>

This is clearly a bug or serious oversight in libpq that should be

The database *knows* this size of the char constant (obviously), and
should report the size via a metadata call, as all other relational
databases do.

What is not clear to me is why it is so important for you to know the length of a piece of data you are supplying. If it is so vitally important, you could always cast it, e.g. select '123'::varchar(3)



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