Background documentationExamples for the SAP::DBTech::loader Module Locate this document in the navigation structure

 

To call the sample.pl Perl script and log on to Loader as user MONA with password RED, and then log on to the DEMODB database, enter the following command at the command line:

perl sample.pl MONA RED DEMODB

Generating a Connection

Syntax Syntax

  1. # To reference Perl libraries:
# ----------------------------
use SAP::DBTech::loader;
# Parse the call arguments
# --------------------------
my $user_name = $ARGV [0];
my $password = $ARGV [1];
my $database_name = $ARGV [2];
# To create a Loader session: (There is still no connection
# to the database)
# ------------------------------------------------------
my $session = new Loader ();
# To log on to the database:
# -------------------------------------
$session->cmd ("use user $user_name $password serverdb $database_name");
# To log off:
# -------------------------------------
$session->release ();
End of the code.
Variant

To prevent the user name and password from being converted into uppercase, enclose use user in double quotation marks in your command.

Syntax Syntax

  1. $session->cmd ("use user \"$user\"_name \"$password\" serverdb $database_name");
End of the code.

The following examples show a shortened login process:

Syntax Syntax

  1. my $session = new Loader ()
$session->cmd ("use user ${ARGV [0]} ${ARGV [1]} serverdb ${ARGV [2]}");
End of the code.
Executing Loader Commands

You can use the cmd (Loader class) method to execute both Loader commands and SQL statements.

Syntax Syntax

  1. use SAP::DBTech::loader;
# To generate a Loader session:
my $session = new Loader ();
$session->cmd ("use user ${ARGV [0]} ${ARGV [1]} serverdb ${ARGV [2]}");
# Executing an SQL Statement
$session->cmd("
	CREATE TABLE customer2
	(
	cno FIXED(4,0) PRIMARY KEY,
	title CHAR(7),
	firstname CHAR (10) ,
	name CHAR (10) NOT NULL,
	zip CHAR(5),
	address CHAR(25) NOT NULL)");
# Executing a DATALOAD Command
$session->cmd("
DATALOAD TABLE customer
	cno 1
	title 2
	firstname 3
	name 4
	zip 5
	address 6
	INFILE 'customer.dat'");
End of the code.
Handling Error Situations

If an error occurs within the cmd method, an exception object of the LoaderError class (loader module) is generated. This exception object can be identified and handled within a try-except statement.

The sql method (Loader class) provides simplified access to errors within SQL statements. If an SQL error occurs within an sql method, an exception is not generated, instead an error number is returned to the caller. This error number can be queried in the program.

Syntax Syntax

  1. use SAP::DBTech::loader;
# To generate a Loader session:
my $session = new Loader ();
$session->cmd ("use user ${ARGV [0]} ${ARGV [1]} serverdb ${ARGV [2]}");
# To query whether a table exists:
my $sqlrc = $session->sql ("EXISTS TABLE customer2");
# The table is created only if it
# does not already exist
if ($sqlrc == -4004) {
	$session->cmd("
		CREATE TABLE customer2
			(
				cno FIXED(4,0) PRIMARY KEY,
				title CHAR(7),
				firstname CHAR (10) ,
				name CHAR (10) NOT NULL,
				zip CHAR(5),
				address CHAR(25) NOT NULL)");
}
# Executing a DATALOAD Command
my $filename = 'customer.dat';
eval {
	$session->cmd("
		DATALOAD TABLE customer2
		cno 1
		title 2
		firstname 3
		name 4
		zip 5
		address 6
		INFILE '$filename'");
};
# To output the error message:
if ($@) {
	print "DATALOAD of file $filename failed: $@\n";
}
End of the code.
Sample Data

The content of the customer.dat file used in the examples is as follows:

Syntax Syntax

  1. "3000","Mrs","Jenny","Porter","10580","1340 N.Ash Street, #3"
"3100","Mr","Peter","Brown","48226","1001 34th Str., APT.3"
"3200","Company","?","Datasoft","90018","486 Maple Str."
"3300","Mrs","Rose","Brian","75243","500 Yellowstone Drive, #2"
"3400","Mrs","Mary","Griffith","20005","3401 Elder Lane"
"3500","Mr","Martin","Randolph","60615","340 MAIN STREET, #7"
"3600","Mrs","Sally","Smith","75243","250 Curtis Street"
"3700","Mr","Mike","Jackson","45211","133 BROADWAY APT. 1"
"3800","Mrs","Rita","Doe","97213","2000 Humboldt Str., #6"
"3900","Mr","George","Howe","75243","111 B Parkway, #23"
"4000","Mr","Frank","Miller","95054","27 5th Str., 76"
"4100","Mrs","Susan","Baker","90018","200 MAIN STREET, #94"
"4200","Mr","Joseph","Peters","92714","700 S. Ash Str., APT.12"
"4300","Company","?","TOOLware","20019","410 Mariposa Str., # 10"
"4400","Mr","Antony","Jenkins","20903","55 A Parkway, #15"
End of the code.