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.\" ========================================================================
.\"
.IX Title "SQL::Translator::Schema 3"
.TH SQL::Translator::Schema 3 "2008-01-01" "perl v5.8.8" "User Contributed Perl Documentation"
.SH "NAME"
SQL::Translator::Schema \- SQL::Translator schema object
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 7
\&  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 => '...' );
.Ve
.SH "DESCSIPTION"
.IX Header "DESCSIPTION"
\&\f(CW\*(C`SQL::Translator::Schema\*(C'\fR is the object that accepts, validates, and
returns the database structure.
.SH "METHODS"
.IX Header "METHODS"
.Sh "as_graph"
.IX Subsection "as_graph"
Returns the schema as an SQL::Translator::Schema::Graph object.
.Sh "as_grap_pmh"
.IX Subsection "as_grap_pmh"
Returns a Graph::Directed object with the table names for nodes.
.Sh "add_table"
.IX Subsection "add_table"
Add a table object.  Returns the new SQL::Translator::Schema::Table object.
The \*(L"name\*(R" 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.
.PP
.Vb 3
\&  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;
.Ve
.Sh "drop_table"
.IX Subsection "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 \f(CW\*(C`SQL::Translator::Schema::Table\*(C'\fR object. The \*(L"cascade\*(R" parameter
can be set to 1 to also drop all triggers on the table, default is 0.
.PP
.Vb 2
\&  $schema->drop_table('mytable');
\&  $schema->drop_table('mytable', cascade => 1);
.Ve
.Sh "add_procedure"
.IX Subsection "add_procedure"
Add a procedure object.  Returns the new SQL::Translator::Schema::Procedure
object.  The \*(L"name\*(R" 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.
.PP
.Vb 3
\&  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;
.Ve
.Sh "drop_procedure"
.IX Subsection "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 \f(CW\*(C`SQL::Translator::Schema::Procedure\*(C'\fR
object.
.PP
.Vb 1
\&  $schema->drop_procedure('myprocedure');
.Ve
.Sh "add_trigger"
.IX Subsection "add_trigger"
Add a trigger object.  Returns the new SQL::Translator::Schema::Trigger object.
The \*(L"name\*(R" 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.
.PP
.Vb 3
\&  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;
.Ve
.Sh "drop_trigger"
.IX Subsection "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 \f(CW\*(C`SQL::Translator::Schema::Trigger\*(C'\fR object.
.PP
.Vb 1
\&  $schema->drop_trigger('mytrigger');
.Ve
.Sh "add_view"
.IX Subsection "add_view"
Add a view object.  Returns the new SQL::Translator::Schema::View object.
The \*(L"name\*(R" 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.
.PP
.Vb 3
\&  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;
.Ve
.Sh "drop_view"
.IX Subsection "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 \f(CW\*(C`SQL::Translator::Schema::View\*(C'\fR object.
.PP
.Vb 1
\&  $schema->drop_view('myview');
.Ve
.Sh "database"
.IX Subsection "database"
Get or set the schema's database.  (optional)
.PP
.Vb 1
\&  my $database = $schema->database('PostgreSQL');
.Ve
.Sh "is_valid"
.IX Subsection "is_valid"
Returns true if all the tables and views are valid.
.PP
.Vb 1
\&  my $ok = $schema->is_valid or die $schema->error;
.Ve
.Sh "get_procedure"
.IX Subsection "get_procedure"
Returns a procedure by the name provided.
.PP
.Vb 1
\&  my $procedure = $schema->get_procedure('foo');
.Ve
.Sh "get_procedures"
.IX Subsection "get_procedures"
Returns all the procedures as an array or array reference.
.PP
.Vb 1
\&  my @procedures = $schema->get_procedures;
.Ve
.Sh "get_table"
.IX Subsection "get_table"
Returns a table by the name provided.
.PP
.Vb 1
\&  my $table = $schema->get_table('foo');
.Ve
.Sh "get_tables"
.IX Subsection "get_tables"
Returns all the tables as an array or array reference.
.PP
.Vb 1
\&  my @tables = $schema->get_tables;
.Ve
.Sh "get_trigger"
.IX Subsection "get_trigger"
Returns a trigger by the name provided.
.PP
.Vb 1
\&  my $trigger = $schema->get_trigger('foo');
.Ve
.Sh "get_triggers"
.IX Subsection "get_triggers"
Returns all the triggers as an array or array reference.
.PP
.Vb 1
\&  my @triggers = $schema->get_triggers;
.Ve
.Sh "get_view"
.IX Subsection "get_view"
Returns a view by the name provided.
.PP
.Vb 1
\&  my $view = $schema->get_view('foo');
.Ve
.Sh "get_views"
.IX Subsection "get_views"
Returns all the views as an array or array reference.
.PP
.Vb 1
\&  my @views = $schema->get_views;
.Ve
.Sh "make_natural_joins"
.IX Subsection "make_natural_joins"
Creates foriegn key relationships among like-named fields in different
tables.  Accepts the following arguments:
.IP "* join_pk_only" 4
.IX Item "join_pk_only"
A True or False argument which determins whether or not to perform 
the joins from primary keys to fields of the same name in other tables
.IP "* skip_fields" 4
.IX Item "skip_fields"
A list of fields to skip in the joins
.PP
.Vb 4
\&  $schema->make_natural_joins(
\&      join_pk_only => 1,
\&      skip_fields  => 'name,department_id',
\&  );
.Ve
.Sh "name"
.IX Subsection "name"
Get or set the schema's name.  (optional)
.PP
.Vb 1
\&  my $schema_name = $schema->name('Foo Database');
.Ve
.Sh "translator"
.IX Subsection "translator"
Get the SQL::Translator instance that instantiated the parser.
.SH "AUTHOR"
.IX Header "AUTHOR"
Ken Youens-Clark <kclark@cpan.org>.