According to the docs, $DBI::errstr is a "dynamic attribute", "always associated with the last handle used", and is "Equivalent to $h->errstr." The example in the documentation for connect even uses $DBI::errstr, not DBI->errstr.

In reply to Re^2: $DBI::errstr is always undef by ikegami
in thread $DBI::errstr is always undef by spivey3587

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