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

DBIx::Simple::Comparison(3pm) User Contributed Perl Documentation DBIx::Simple::Comparison(3pm)

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

LICENSE

There is no license. This software was released into the public domain. Do with it what you want, but on your own risk. The author disclaims any responsibility.

AUTHOR

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

SEE ALSO

DBI, DBIx::Simple
2007-07-14 perl v5.10.0