NAME

DBIx::Array - This module is a wrapper around DBI with array interfaces

SYNOPSIS

use DBIx::Array;
my $dbx=DBIx::Array->new;
$dbx->connect($connection, $user, $pass, \%opt); #passed to DBI
my @array=$dbx->sqlarray($sql, @params);

DESCRIPTION

This module is for people who understand SQL and who understand fairly complex Perl data structures. If you undstand how to modify your SQL to meet your data requirements then this module is for you. In the example below, only one line of code is needed to generate an entire HTML table.

print &tablename($dba->sqlarrayarrayname(&sql, 15)), "\n";
 
sub tablename {
  use CGI; my $html=CGI->new(""); #you would pass this reference
  return $html->table($html->Tr([map {$html->td($_)} @_]));
}
 
sub sql { #Oracle SQL
  return q{SELECT LEVEL AS "Number",
                  TRIM(TO_CHAR(LEVEL, 'rn')) as "Roman Numeral"
             FROM DUAL CONNECT BY LEVEL <= ? ORDER BY LEVEL};
}

This module is used to connect to Oracle 10g (DBD::Oracle), MySql 4 and 5 (DBD::mysql) and Microsoft SQL Server (DBD::Sybase) databases in a 24x7 production environment. The test are written against DBD::SQLite, DBD::CSV and DBD::XBase.

USAGE

CONSTRUCTOR

new

my $dbx=DBIx::Array->new();
$dbx->connect(...); #connect to database, sets and returns dbh

my $dbx=DBIx::Array->new(dbh=>$dbh); #aready have a handle

METHODS

initialize

METHODS (Properties)

name

Set or returns a user friendly identification string for this database connection

my $name=$dbx->name;
my $name=$dbx->name($string);

METHODS (DBI Wrappers)

connect

Connects to the database and returns the database handle.

$dbx->connect($connection, $user, $pass, \%opt);

Pass through to DBI->connect;

Examples:

$dbx->connect("DBI:mysql:database=mydb;host=myhost", "user", "pass", {AutoCommit=>1, RaiseError=>1});

$dbx->connect("DBI:Sybase:server=myhost;datasbase=mydb", "user", "pass", {AutoCommit=>1, RaiseError=>1}); #Microsoft SQL Server API is same as Sybase API

$dbx->connect("DBI:Oracle:TNSNAME", "user", "pass", {AutoCommit=>1, RaiseError=>1});

disconnect

Calls $dbh->disconnect

$dbx->disconnect;

Pass through to dbh->disconnect

commit

Pass through to dbh->commit

$dbx->commit;

rollback

Pass through to dbh->rollback

$dbx->rollback;

AutoCommit

Pass through to dbh->{'AutoCommit'} or dbh->{'AutoCommit'}=shift;

$dbx->AutoCommit(1);
&doSomething if $dbx->AutoCommit;

RaiseError

Pass through to dbh->{'RaiseError'} or dbh->{'RaiseError'}=shift;

$dbx->RaiseError(1);
&doSomething if $dbx->RaiseError;

errstr

Returns $DBI::errstr

$dbx->errstr;

dbh

Sets or returns the database handle object.

$dbx->dbh;
$dbx->dbh($dbh);  #if you already have a connection

METHODS (Read)

sqlcursor

Returns the prepared and executed SQL cursor so that you can use the cursor elsewhere. Every method in this package uses this single method to generate a sqlcursor.

my $sth=$dbx->sqlcursor($sql, \@param); #binds are ? values are positional
my $sth=$dbx->sqlcursor($sql,  @param); #binds are ? values are positional
my $sth=$dbx->sqlcursor($sql, \%param); #binds are :key

Note: In true Perl fashion extra hash binds are ignored.

my @foo=$dbx->sqlarray("select :foo, :bar from dual",
                       {foo=>"a", bar=>1, baz=>"buz"}); #returns ("a", 1)

my $one=$dbx->sqlscalar("select ? from dual", ["one"]); #returns "one"

my $two=$dbx->sqlscalar("select ? from dual", "two");   #returns "two"

my $inout=3;
$dbx->execute("BEGIN :inout := :inout * 2; END;", {inout=>\$inout});
print "$inout\n";  #$inout is 6

sqlscalar

Returns the SQL query as a scalar.

This works great for selecting one value.

$scalar=$dbx->sqlscalar($sql,  @parameters); #returns $
$scalar=$dbx->sqlscalar($sql, \@parameters); #returns $
$scalar=$dbx->sqlscalar($sql, \%parameters); #returns $

sqlarray

Returns the SQL query as an array or array reference.

This works great for selecting one column from a table or selecting one row from a table.

$array=$dbx->sqlarray($sql,  @parameters); #returns [$,$,$,...]
@array=$dbx->sqlarray($sql,  @parameters); #returns ($,$,$,...)
$array=$dbx->sqlarray($sql, \@parameters); #returns [$,$,$,...]
@array=$dbx->sqlarray($sql, \@parameters); #returns ($,$,$,...)
$array=$dbx->sqlarray($sql, \%parameters); #returns [$,$,$,...]
@array=$dbx->sqlarray($sql, \%parameters); #returns ($,$,$,...)

sqlhash

Returns the first two columns of the SQL query as a hash or hash reference {Key=>Value, Key=>Value, ...}

$hash=$dbx->sqlhash($sql,  @parameters); #returns {$=>$, $=>$, ...}
%hash=$dbx->sqlhash($sql,  @parameters); #returns ($=>$, $=>$, ...)
@hash=$dbx->sqlhash($sql,  @parameters); #this is ordered
@keys=grep {!($n++ % 2)} @hash;         #ordered keys

$hash=$dbx->sqlhash($sql, \@parameters); #returns {$=>$, $=>$, ...}
%hash=$dbx->sqlhash($sql, \@parameters); #returns ($=>$, $=>$, ...)
$hash=$dbx->sqlhash($sql, \%parameters); #returns {$=>$, $=>$, ...}
%hash=$dbx->sqlhash($sql, \%parameters); #returns ($=>$, $=>$, ...)

sqlarrayarray

Returns the SQL data as an array or array ref of array references ([],[],...) or [[],[],...]

$array=$dbx->sqlarrayarray($sql,  @parameters); #returns [[$,$,...],[],[],...]
@array=$dbx->sqlarrayarray($sql,  @parameters); #returns ([$,$,...],[],[],...)
$array=$dbx->sqlarrayarray($sql, \@parameters); #returns [[$,$,...],[],[],...]
@array=$dbx->sqlarrayarray($sql, \@parameters); #returns ([$,$,...],[],[],...)
$array=$dbx->sqlarrayarray($sql, \%parameters); #returns [[$,$,...],[],[],...]
@array=$dbx->sqlarrayarray($sql, \%parameters); #returns ([$,$,...],[],[],...)

sqlarrayarrayname

Returns the SQL data as an array or array ref of array references ([],[],...) or [[],[],...] where the first rows is the column names

$array=$dbx->sqlarrayarrayname($sql,  @parameters); #returns [[$,$,...],[]...]
@array=$dbx->sqlarrayarrayname($sql,  @parameters); #returns ([$,$,...],[]...)
$array=$dbx->sqlarrayarrayname($sql, \@parameters); #returns [[$,$,...],[]...]
@array=$dbx->sqlarrayarrayname($sql, \@parameters); #returns ([$,$,...],[]...)
$array=$dbx->sqlarrayarrayname($sql, \%parameters); #returns [[$,$,...],[]...]
@array=$dbx->sqlarrayarrayname($sql, \%parameters); #returns ([$,$,...],[]...)

_sqlarrayarray

$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[ @parameters], name=>1);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[ @parameters], name=>1);
$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[ @parameters], name=>0);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[ @parameters], name=>0);

$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\@parameters], name=>1);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\@parameters], name=>1);
$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\@parameters], name=>0);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\@parameters], name=>0);

$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\%parameters], name=>1);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\%parameters], name=>1);
$array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\%parameters], name=>0);
@array=$dbx->_sqlarrayarray(sql=>$sql, param=>[\%parameters], name=>0);

sqlarrayhash

Returns the SQL data as an array or array ref of hash references ({},{},...) or [{},{},...]

$array=$dbx->sqlarrayhash($sql,  @parameters); #returns [{},{},{},...]
@array=$dbx->sqlarrayhash($sql,  @parameters); #returns ({},{},{},...)
$array=$dbx->sqlarrayhash($sql, \@parameters); #returns [{},{},{},...]
@array=$dbx->sqlarrayhash($sql, \@parameters); #returns ({},{},{},...)
$array=$dbx->sqlarrayhash($sql, \%parameters); #returns [{},{},{},...]
@array=$dbx->sqlarrayhash($sql, \%parameters); #returns ({},{},{},...)

sqlarrayhashname

Returns the SQL of data as an array or array ref of hash references ([],{},{},...) or [[],{},{},...] where the first rows is an array reference of the column names

$array=$dbx->sqlarrayhashname($sql,  @parameters); #returns [[],{},{},...]
@array=$dbx->sqlarrayhashname($sql,  @parameters); #returns ([],{},{},...)
$array=$dbx->sqlarrayhashname($sql, \@parameters); #returns [[],{},{},...]
@array=$dbx->sqlarrayhashname($sql, \@parameters); #returns ([],{},{},...)
$array=$dbx->sqlarrayhashname($sql, \%parameters); #returns [[],{},{},...]
@array=$dbx->sqlarrayhashname($sql, \%parameters); #returns ([],{},{},...)

_sqlarrayhash

Returns the SQL data as an array or array ref of hash references ({},{},...) or [{},{},...]

$array=$dbx->_sqlarrayhash(sql=>$sql, param=>\@parameters, name=>1);
@array=$dbx->_sqlarrayhash(sql=>$sql, param=>\@parameters, name=>1);
$array=$dbx->_sqlarrayhash(sql=>$sql, param=>\@parameters, name=>0);
@array=$dbx->_sqlarrayhash(sql=>$sql, param=>\@parameters, name=>0);

sqlsort

Returns the SQL statments with the correct ORDER BY clause given a SQL statment (without an ORDER BY clause) and a signed integer on which column to sort.

my $sql=$dbx->sqlsort(qq{SELECT 1,'Z' FROM DUAL UNION SELECT 2,'A' FROM DUAL}, -2);

Returns

SELECT 1,'Z' FROM DUAL UNION SELECT 2,'A' FROM DUAL ORDER BY 2 DESC

sqlarrayarraynamesort

Returns a sqlarrayarrayname for $sql sorted on column $n where n is an integer asending for positive, desending for negative, and 0 for no sort.

my $data=$dbx->sqlarrayarraynamesort($sql, $n,  @parameters);
my $data=$dbx->sqlarrayarraynamesort($sql, $n, \@parameters);
my $data=$dbx->sqlarrayarraynamesort($sql, $n, \%parameters);

Note: $sql must not have an "ORDER BY" clause in order for this function to work corectly.

METHODS (Write)

update, delete, execute, insert

Returns the number of rows updated or deleted by the SQL statement.

$rows=$dbx->update( $sql,  @parameters);
$rows=$dbx->delete( $sql,  @parameters);
$rows=$dbx->execute($sql, \@parameters);
$rows=$dbx->execute($sql, \%parameters);

Remember to commit or use AutoCommit

Note: It appears that some drivers do not support the count of rows. For example, DBD::Oracle does not support row counts on delete instead the value apears to be a success code.

Note: Currently update, insert, delete, and execute all point to the same method. This may change in the future if we need to change the behavior of one method. So, please use the correct method name for your function.

TODO

I would like to add caching service in the sqlcursor method.

BUGS

SUPPORT

DavisNetworks.com supports all Perl applications big or small.

AUTHOR

Michael R. Davis
CPAN ID: MRDVT
STOP, LLC
domain=>stopllc,tld=>com,account=>mdavis
http://www.stopllc.com/

COPYRIGHT

This program is free software licensed under the...

The BSD License

The full text of the license can be found in the LICENSE file included with this module.

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