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DBIx-Simple-1.35
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/ DBIx::Simple::Comparison

NAME

DBIx::Simple::Comparison - DBIx::Simple in DBI jargon

DESCRIPTION

This is just a simple and inaccurate overview of what DBI things the DBIx::Simple things represent, or the other way around.

This document can be useful to find the foo equivalent of bar.

? means that DBI doesn't have an equivalent or that I couldn't find one.

= means that DBIx::Simple provides a direct wrapper to the DBI function.

~ means that DBIx::Simple's method does more or less the same, but usually in a more high level way: context sensitive, combining things, automatically taking care of something.

Note that DBIx::Simple is a wrapper around DBI. It is not "better" than DBI. In fact, DBIx::Simple cannot work without DBI.

Using DBI directly is always faster than using DBIx::Simple's equivalents. (For the computer, that is. For you, DBIx::Simple is supposed to be faster.)

Classes, common names

use DBI       ~  use DBIx::Simple

$DBI::errstr  =  DBIx::Simple->error

DBI::db       ~  DBIx::Simple
$dbh          ~  $db
$dbh->errstr  =  $db->error

connect       ~  connect
connect       ~  new

DBI::st       ~  DBIx::Simple::Result
<undef>       ~  DBIx::Simple::Dummy
$sth          ~  $result

Queries

DBI

my $sth = $dbh->prepare_cached($query);
$sth->execute(@values);

~ DBIx::Simple

my $result = $db->query($query, $values);

Results

DBI                          DBIx::Simple

bind_columns              ~  bind

fetchrow_arrayref/fetch   =  fetch
fetchrow_array            ~  list
*1                        ~  flat
[@{fetchrow_arrayref}]    =  array
fetchall_arrayref         ~  arrays
fetchrow_hashref() *2*3   =  hash
fetchall_arrayref({}) *4  ~  hashes

fetchall_hashref *2       =  map_hashes
?                         ?  map_arrays
fetchall_hashref(1) *2    =  map

$sth->{NAME_lc/NAME}      =  $result->columns

*1 There's no fetch variant, but you can do { @{ $dbh->selectcol_arrayref('SELECT ...', { Slice => [] }) } }.

*2 To receive the keys (column names) lowercased, use $db->{FetchHashKeyName} = 'NAME_lc'. DBIx::Simple lower cases them by default.

*3 Or supply an argument, 'NAME_lc'.

*4 No, arrayref isn't a typo. When supplied an empty hash reference, DBI's fetchall_arrayref actually returns hashrefs. This DBI method does not support lower casing of keys, DBIx::Simple does.

Direct access

DBI                 DBIx::Simple

$dbh             =  $db->dbh
$sth->{$foo}     =  $result->attr($foo)

func             =  func

begin_work       =  begin_work
commit           =  commit
rollback         =  rollback
last_insert_id   =  last_insert_id
rows             =  rows

disconnect       ~  disconnect
finish           ~  finish

DBIx::Simple specific (?)

keep_statements
lc_columns
iquery (via SQL::Interp)
select, insert, update, delete (via SQL::Abstract)
abstract (via SQL::Abstract)
flat
hashes
map_arrays
map

AUTHOR

Juerd Waalboer <juerd@cpan.org> <http://juerd.nl/>

SEE ALSO

DBI, DBIx::Simple