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.\" ========================================================================
.\"
.IX Title "DBIx::Simple::Comparison 3pm"
.TH DBIx::Simple::Comparison 3pm "2023-09-01" "perl v5.36.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
DBIx::Simple::Comparison \- DBIx::Simple in DBI jargon
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This is just a simple and \fBinaccurate\fR overview of what \s-1DBI\s0 things the
DBIx::Simple things represent, or the other way around.
.PP
This document can be useful to find the foo equivalent of bar.
.PP
\&\f(CW\*(C`?\*(C'\fR means that \s-1DBI\s0 doesn't have an equivalent or that I couldn't find one.
.PP
\&\f(CW\*(C`=\*(C'\fR means that DBIx::Simple provides a direct wrapper to the \s-1DBI\s0 function.
.PP
\&\f(CW\*(C`~\*(C'\fR 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.
.PP
Note that DBIx::Simple is a wrapper around \s-1DBI.\s0 It is not \*(L"better\*(R" than \s-1DBI.\s0 In
fact, DBIx::Simple cannot work without \s-1DBI.\s0
.PP
Using \s-1DBI\s0 directly is always faster than using DBIx::Simple's equivalents. (For
the computer, that is. For you, DBIx::Simple is supposed to be faster.)
.SS "Classes, common names"
.IX Subsection "Classes, common names"
.Vb 1
\& 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
.Ve
.SS "Queries"
.IX Subsection "Queries"
\&\s-1DBI\s0
.PP
.Vb 2
\& my $sth = $dbh\->prepare_cached($query);
\& $sth\->execute(@values);
.Ve
.PP
~ DBIx::Simple
.PP
.Vb 1
\& my $result = $db\->query($query, $values);
.Ve
.SS "Results"
.IX Subsection "Results"
.Vb 1
\& 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
.Ve
.PP
*1 There's no fetch variant, but you can do \f(CW\*(C`{ @{
$dbh\->selectcol_arrayref(\*(AqSELECT ...\*(Aq, { Slice => [] }) } }\*(C'\fR.
.PP
*2 To receive the keys (column names) lowercased, use \f(CW\*(C`$db\->{FetchHashKeyName} = \*(AqNAME_lc\*(Aq\*(C'\fR. DBIx::Simple lower cases them by
default.
.PP
*3 Or supply an argument, \f(CW\*(AqNAME_lc\*(Aq\fR.
.PP
*4 No, arrayref isn't a typo. When supplied an empty hash reference, \s-1DBI\s0's
fetchall_arrayref actually returns hashrefs. This \s-1DBI\s0 method does not support
lower casing of keys, DBIx::Simple does.
.SS "Direct access"
.IX Subsection "Direct access"
.Vb 1
\& 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
.Ve
.SS "DBIx::Simple specific (?)"
.IX Subsection "DBIx::Simple specific (?)"
.Vb 9
\& keep_statements
\& lc_columns
\& iquery (via SQL::Interp)
\& select, insert, update, delete (via SQL::Abstract)
\& abstract (via SQL::Abstract)
\& flat
\& hashes
\& map_arrays
\& map
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Juerd Waalboer <juerd@cpan.org> <http://juerd.nl/>
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1DBI\s0, DBIx::Simple