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I don't think the documentation is wrong at all. There may be something wrong with DBD::mysql in your case and perhaps with DBD::Oracle in the past but for DBD::ODBC and DBD::Oracle now

perl -le 'use strict; use warnings;use DBI; my $h = DBI->connect("dbi: +ODBC:does_not_exist", undef, undef, {PrintError => 0, RaiseError => 0 +}) or die $DBI::errstr;' [unixODBC][Driver Manager]Data source name not found, and no default d +river specified (SQL-IM002) at -e line 1.
perl -le 'use strict; use warnings; use DBI; my $h = DBI->connect("dbi +:Oracle:host=fred.example.com;sid=fred", "xxx","yyy", {RaiseError => +0, PrintError => 0}) or die $DBI::errstr;' ORA-24327: need explicit attach before authenticating a user (DBD ERRO +R: OCISessionBegin) at -e line 1.
they both seem to work fine for me. Interestingly, every time (except for the OP in this thread) I see this mentioned these days it is DBD::mysql. However, for me even DBD::mysql works fine:
perl -le 'use strict; use warnings; use DBI; my $h = DBI->connect("dbi +:mysql:database=testd", "xxx","yyy", {RaiseError => 0, PrintError => +0}) or die $DBI::errstr;' Unknown database 'testd' at -e line 1.

I'm using all the latest released DBDs and DBI.


In reply to Re^3: $DBI::errstr is always undef by mje
in thread $DBI::errstr is always undef by spivey3587

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