SQL::Translator::Schema(3)

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>.