NAME

DBIx::UpdateTable::FromHoH - Update database table from hash-of-hash

VERSION

This document describes version 0.002 of DBIx::UpdateTable::FromHoH (from Perl distribution DBIx-UpdateTable-FromHoH), released on 2020-05-06.

DESCRIPTION

Currently only tested on SQLite.

FUNCTIONS

update_table_from_hoh

Usage:

 update_table_from_hoh(%args) -> [status, msg, payload, meta]

Update database table from hash-of-hash.

Given a table t1 like this:

 id    col1    col2    col3
 --    ----    ----    ----
 1     a       b       foo
 2     c       c       bar
 3     g       h       qux

this code:

 my $res = update_table_from_hoh(
     dbh => $dbh,
     table => 't1',
     key_column => 'id',
     hoh => {
         1 => {col1=>'a', col2=>'b'},
         2 => {col1=>'c', col2=>'d'},
         4 => {col1=>'e', col2=>'f'},
     },
 );

will perform these SQL queries:

 UPDATE TABLE t1 SET col2='d' WHERE id='2';
 INSERT INTO t1 (id,col1,col2) VALUES (4,'e','f');
 DELETE FROM t1 WHERE id='3';

to make table t1 become like this:

 id    col1    col2    col3
 --    ----    ----    ----
 1     a       b       foo
 2     c       d       bar
 4     e       f       qux

This function is not exported by default, but exportable.

Arguments ('*' denotes required arguments):

  • data_columns => array[str]

  • dbh* => obj

  • extra_insert_columns => hos

  • extra_update_columns => hos

  • hoh* => hoh

  • key_column* => str

  • table* => str

  • use_tx => bool (default: 1)

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/DBIx-UpdateTable-FromHoH.

SOURCE

Source repository is at https://github.com/perlancar/perl-DBIx-UpdateTable-FromHoH.

BUGS

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

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::UpdateHoH::FromTable

DBIx::Compare to compare database contents.

diffdb from App::diffdb which can compare two database (schema as well as content) and display the result as the familiar colored unified-style diff.

DBIx::Diff::Schema

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020 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.