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#!/usr/bin/perl 

#------------------------------------------------------------------------------- 
# The DBI module is the interface to the database, and the strict module 
# forces us to declare variables so we don't get burned by a global variable 
# with the same name. 
#------------------------------------------------------------------------------- 

#require DBI; 
use DBI; 
use strict; 

#------------------------------------------------------------------------------- 
# declare local variables 
#------------------------------------------------------------------------------- 


my $dbh; 
my $sth; 

my $data_source; 
my $username; 
my $password; 
my %dbOptions; 

my $rc; 
my $rowCount; 
my $empno; 
my $ename; 
my @resultRow; 


#------------------------------------------------------------------------------- 
# declare variables with database connection information 
#------------------------------------------------------------------------------- 


$data_source = "dbi:ODBC:ORA8I_SOLARIS"; 
$username ='scott'; 
$password = 'tiger'; 
%dbOptions = {PrintError => 1, AutoCommit => 2}; 

#------------------------------------------------------------------------------- 
# connect to the database 
#------------------------------------------------------------------------------- 

$dbh = DBI->connect("$data_source", '', '') or die "$DBI::errstr\n"; 
$dbh->{PrintError} = 0; 
$dbh->{AutoCommit} = 0; 
$dbh->{LongReadLen} = 64000; 

if ( defined($DBI::err) ) { 
    if ( $DBI::err != 0 ) { 
        printf( STDERR "$0: Connect to Oracle server failed with the following 
error:\n"); 
        printf( STDERR "    %s\n\n", $DBI::errstr); 
        exit(1); 
    } 
} 

#------------------------------------------------------------------------------- 
# set up the SQL statement to be sent 
#------------------------------------------------------------------------------- 

$rc = $dbh->do("create table foo (id int)"); 

if ( !defined($rc) ) { 
    printf( STDERR "$0: Create table failed with the following error:\n"); 
    printf( STDERR "    %s\n\n", $DBI::errstr); 
} 
else { 
    printf( STDERR "$0: Create table succeeded.\n"); 
} 

#------------------------------------------------------------------------------- 
# commit 
#------------------------------------------------------------------------------- 

$rc = $dbh->commit; 

#------------------------------------------------------------------------------- 
# set up the SQL statement to be sent 
#------------------------------------------------------------------------------- 

$sth = $dbh->prepare("select empno, ename from emp order by empno"); 

if ( $DBI::err != 0 ) { 
    printf(STDERR "Error parsing SQL:\n"); 
    printf(STDERR "%s\n\n", $DBI::errstr); 
    exit(-1); 
} 

#------------------------------------------------------------------------------- 
# execute the SQL statement 
#------------------------------------------------------------------------------- 

$rc = $sth->execute; 

# rc is useless for select statements 

if ( defined($DBI::err) ) { 
    if ( $DBI::err != 0 ) { 
        printf( STDERR "$0: Select from emp table failed with the following error:\n"); 
        printf( STDERR "    %s\n\n", $DBI::errstr); 
    } 
} 

#------------------------------------------------------------------------------- 
# fetch each row of data from the database and process it 
#------------------------------------------------------------------------------- 

for ( @resultRow = $sth->fetchrow_array; 
      @resultRow != (); 
      @resultRow = $sth->fetchrow_array ) { 
        ($empno, $ename) = @resultRow; 
        printf("%8d %1s\n", $empno, $ename); 
} 

#------------------------------------------------------------------------------- 
# free resources from the select cursor 
#------------------------------------------------------------------------------- 

$rc = $sth->finish; 

#------------------------------------------------------------------------------- 
# Get the row count (THIS ONLY WORKS IF YOU FETCH ALL OF THE ROWS) 
#------------------------------------------------------------------------------- 

$rowCount = $sth->rows; 
printf("\n%d rows processed.\n\n", $rowCount); 

#------------------------------------------------------------------------------- 
# disconnect from the database 
#------------------------------------------------------------------------------- 

$rc  = $dbh->disconnect; 

#------------------------------------------------------------------------------- 
# return success to the OS 
#------------------------------------------------------------------------------- 

exit(0);