SQL::Translator::Schema

(source, CPAN)

version 1.66

NAME
SYNOPSIS
DESCSIPTION
METHODS
- as_graph_pm
- add_table
- drop_table
- add_procedure
- drop_procedure
- add_trigger
- drop_trigger
- add_view
- drop_view
- database
- is_valid
- get_procedure
- get_procedures
- get_table
- get_tables
- get_trigger
- get_triggers
- get_view
- get_views
- make_natural_joins
- name
- translator
AUTHOR

#NAME

SQL::Translator::Schema - SQL::Translator schema object

#SYNOPSIS

use SQL::Translator::Schema;
my $schema   =  SQL::Translator::Schema->new(
    name     => 'Foo',
    database => 'MySQL',
);
my $table    = $schema->add_table( name => 'foo' );
my $view     = $schema->add_view( name => 'bar', sql => '...' );

#DESCSIPTION

SQL::Translator::Schema is the object that accepts, validates, and returns the database structure.

#METHODS

#as_graph_pm

Returns a Graph::Directed object with the table names for nodes.

#add_table

Add a table object. Returns the new SQL::Translator::Schema::Table object. The "name" parameter is required. If you try to create a table with the same name as an existing table, you will get an error and the table will not be created.

my $t1 = $schema->add_table( name => 'foo' ) or die $schema->error;
my $t2 = SQL::Translator::Schema::Table->new( name => 'bar' );
$t2    = $schema->add_table( $table_bar ) or die $schema->error;

#drop_table

Remove a table from the schema. Returns the table object if the table was found and removed, an error otherwise. The single parameter can be either a table name or an SQL::Translator::Schema::Table object. The "cascade" parameter can be set to 1 to also drop all triggers on the table, default is 0.

$schema->drop_table('mytable');
$schema->drop_table('mytable', cascade => 1);

#add_procedure

Add a procedure object. Returns the new SQL::Translator::Schema::Procedure object. The "name" parameter is required. If you try to create a procedure with the same name as an existing procedure, you will get an error and the procedure will not be created.

my $p1 = $schema->add_procedure( name => 'foo' );
my $p2 = SQL::Translator::Schema::Procedure->new( name => 'bar' );
$p2    = $schema->add_procedure( $procedure_bar ) or die $schema->error;

#drop_procedure

Remove a procedure from the schema. Returns the procedure object if the procedure was found and removed, an error otherwise. The single parameter can be either a procedure name or an SQL::Translator::Schema::Procedure object.

$schema->drop_procedure('myprocedure');

#add_trigger

Add a trigger object. Returns the new SQL::Translator::Schema::Trigger object. The "name" parameter is required. If you try to create a trigger with the same name as an existing trigger, you will get an error and the trigger will not be created.

my $t1 = $schema->add_trigger( name => 'foo' );
my $t2 = SQL::Translator::Schema::Trigger->new( name => 'bar' );
$t2    = $schema->add_trigger( $trigger_bar ) or die $schema->error;

#drop_trigger

Remove a trigger from the schema. Returns the trigger object if the trigger was found and removed, an error otherwise. The single parameter can be either a trigger name or an SQL::Translator::Schema::Trigger object.

$schema->drop_trigger('mytrigger');

#add_view

Add a view object. Returns the new SQL::Translator::Schema::View object. The "name" parameter is required. If you try to create a view with the same name as an existing view, you will get an error and the view will not be created.

my $v1 = $schema->add_view( name => 'foo' );
my $v2 = SQL::Translator::Schema::View->new( name => 'bar' );
$v2    = $schema->add_view( $view_bar ) or die $schema->error;

#drop_view

Remove a view from the schema. Returns the view object if the view was found and removed, an error otherwise. The single parameter can be either a view name or an SQL::Translator::Schema::View object.

$schema->drop_view('myview');

#database

Get or set the schema's database. (optional)

my $database = $schema->database('PostgreSQL');

#is_valid

Returns true if all the tables and views are valid.

my $ok = $schema->is_valid or die $schema->error;

#get_procedure

Returns a procedure by the name provided.

my $procedure = $schema->get_procedure('foo');

#get_procedures

Returns all the procedures as an array or array reference.

my @procedures = $schema->get_procedures;

#get_table

Returns a table by the name provided.

my $table = $schema->get_table('foo');

#get_tables

Returns all the tables as an array or array reference.

my @tables = $schema->get_tables;

#get_trigger

Returns a trigger by the name provided.

my $trigger = $schema->get_trigger('foo');

#get_triggers

Returns all the triggers as an array or array reference.

my @triggers = $schema->get_triggers;

#get_view

Returns a view by the name provided.

my $view = $schema->get_view('foo');

#get_views

Returns all the views as an array or array reference.

my @views = $schema->get_views;

#make_natural_joins

Creates foreign key relationships among like-named fields in different tables. Accepts the following arguments:

join_pk_only

A True or False argument which determines whether or not to perform the joins from primary keys to fields of the same name in other tables
skip_fields

A list of fields to skip in the joins

$schema->make_natural_joins(
    join_pk_only => 1,
    skip_fields  => 'name,department_id',
);

#name

Get or set the schema's name. (optional)

my $schema_name = $schema->name('Foo Database');

#translator

Get the SQL::Translator instance that instantiated the parser.

#AUTHOR

Ken Youens-Clark <kclark@cpan.org>.

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