NAME

SQL::Translator::Producer::Oracle - Oracle SQL producer

SYNOPSIS

use SQL::Translator;

my $t = SQL::Translator->new( parser => '...', producer => 'Oracle' );
print $translator->translate( $file );

DESCRIPTION

Creates an SQL DDL suitable for Oracle.

producer_args

delay_constraints

This option remove the primary key and other key constraints from the CREATE TABLE statement and adds ALTER TABLEs at the end with it.

NOTES

Autoincremental primary keys

This producer uses sequences and triggers to autoincrement primary key columns, if necessary. SQLPlus and DBI expect a slightly different syntax of CREATE TRIGGER statement. You might have noticed that this producer returns a scalar containing all statements concatenated by newlines or an array of single statements depending on the context (scalar, array) it has been called in.

SQLPlus expects following trigger syntax:

CREATE OR REPLACE TRIGGER ai_person_id
BEFORE INSERT ON person
FOR EACH ROW WHEN (
 new.id IS NULL OR new.id = 0
)
BEGIN
 SELECT sq_person_id.nextval
 INTO :new.id
 FROM dual;
END;
/

Whereas if you want to create the same trigger using "do" in DBI, you need to omit the last slash:

my $dbh = DBI->connect('dbi:Oracle:mysid', 'scott', 'tiger');
$dbh->do("
    CREATE OR REPLACE TRIGGER ai_person_id
    BEFORE INSERT ON person
    FOR EACH ROW WHEN (
     new.id IS NULL OR new.id = 0
    )
    BEGIN
     SELECT sq_person_id.nextval
     INTO :new.id
     FROM dual;
    END;
");

If you call this producer in array context, we expect you want to process the returned array of statements using DBI like "deploy" in DBIx::Class::Schema does.

To get this working we removed the slash in those statements in version 0.09002 of SQL::Translator when called in array context. In scalar context the slash will be still there to ensure compatibility with SQLPlus.

CREDITS

Mad props to Tim Bunce for much of the logic stolen from his "mysql2ora" script.

AUTHOR

Ken Y. Clark <kclark@cpan.org>.

SEE ALSO

SQL::Translator, DDL::Oracle, mysql2ora.