If you want the schema information to hash it, the most generic way would be the catalog methods of DBI:

my $sth = $dbh->table_info();
my $tables = $sth->fetchall_arrayref();
print Dumper @$tables;

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In reply to Re^3: Hashing temporal tables in PostgreSQL by Corion
in thread Hash generate and find tampered tables in PostgreSQL by gtk

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