如何在perl脚本中调用SQL

Question

I am trying to connect with database and perform some SQL queries by using this code, but every time it hangs.

my $connect_str = `/osp/local/etc/.oralgn $srv_name PSMF`;
my $sqlFile = "/osp/local/home/linus/amit/mytest.sql";
my ($abc, $cde)= split (/\@/ , $connect_str );
print "$abc";

$ORACLE_SID=SDDG00;
`export $ORACLE_SID`;

#chomp($abc);

#$abc=~ s/\s+$//;
`sqlplus $abc`;

open (SQL, "$sqlFile");


while (my $sqlStatement = <SQL>) {
   $sth = dbi->prepare($sqlStatement)
         or die (qq(Can't prepare $sqlStatement));

            $sth->execute()
                  or die qq(Can't execute $sqlStatement);
                  }

How do I invoke a SQL command inside Perl ?

Answer 1

Reading the documentation for the DBI module would be a good start.

Your problem seems to be this line.

$sth = dbi->prepare($sqlStatement)

You're trying to call the prepare method on the class "dbi". But you don't have a class called "dbi" in your program (or, at least, I can't see one in the code you've shown us).

To use a database from Perl you need to do these things:

1/ Load the DBI module (note, "DBI", not "dbi" - Perl is case sensitive).

use DBI;

2/ Connect to the database and get a database handle (Read the DBD::Oracle documentation for more details on the arguments to the connect() method).

my $dbh = DBI->connect('dbi:Oracle:dbname', $user, $password);

3/ You can then use this database handle to prepare SQL statements.

my $sth = $dbh->prepare($sqlStatement);