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Q: extract database name from directory dump

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Hi,

I have been searching but haven't been able to find the
answer to the following question:

How can I (programmatically) find out which database a dump
was taken from given the dump file ?

Constraints of the question:

- existing dump in directory format
- dump was taken of only one particular database

Not-so-nice solutions coming to mind:

- rely on the dump file name
- use pg_restore to create an SQL dump
  with --create and grep the SQL file
  for "create database ..."
- restore and compare psql -l output
  before/after the fact

However, I'd wish for a less fragile solution, letting me
learn the database directly from the directory dump (given
the above assumptions about the dump).

Am I missing options for doing so ?

Karsten
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