NAME

Patch::DBI::WriteCSV - Patch DBI to also write CSV while fetching rows

VERSION

This document describes version 0.002 of Patch::DBI::WriteCSV (from Perl distribution Patch-DBI-WriteCSV), released on 2018-12-21.

SYNOPSIS

 use DBI;
 require Patch:DBI::WriteCSV;
 my $dbh = DBI->connect("dbi:mysql:database=mydb", "someuser", "somepass");

 {
     Patch::DBI::WriteCSV->import; # start writing CSV
     my $sth = $dbh->prepare("SELECT * FROM member");
     while (my $row = $sth->fetchrow_hashref) {
         # do something with $row
     }
     Patch::DBI::WriteCSV->unimport; # no longer write CSV
 }

The above code will print CSV to STDOUT, e.g.:

 Name,Rank,Serial
 alice,pvt,123456
 bob,cpl,98765321
 carol,"brig gen",8745

DESCRIPTION

This package patches the following DBI methods:

 fetchrow_array
 fetchrow_arrayref
 fetchrow_hashref
 fetchall_arrayref
 fetchall_hashref

to also write CSV while fetching row(s). By default it writes to STDOUT but this can be customized (see "IMPORTS").

Compared to solution like DBIx::CSV, this solution does not introduce new methods to DBI's database/statement handle, so producing CSV can be easier when you do not use DBI directly, like when you use DBIx::Class.

IMPORTS

Usage:

 Patch::DBI::WriteCSV->import(%opts);

Known options:

• csv

  A Text::CSV object to use. If not specified, will instantiate a new default one:

   Text::CSV->new

• handle

  File handle to write CSV to. Defaults to STDOUT if this as well as "filename" is not specified.

• filename

  File name to open (in append-mode) to write CSV to.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Patch-DBI-WriteCSV.

SOURCE

Source repository is at https://github.com/perlancar/perl-Patch-DBI-WriteCSV.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=Patch-DBI-WriteCSV

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

SEE ALSO

DBIx::CSV

https://www.perlmonks.org/?node_id=1227520

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm Patch::DBI::WriteCSV

perl -MCPAN -e shell
install Patch::DBI::WriteCSV