• NAME
• SYNOPSIS
• DESCRIPTION
• ABSTRACT METHODS
• METHODS
• SEE ALSO
• AUTHOR
• COPYRIGHT

NAME

DB::Introspector::Base::Table

SYNOPSIS

 use DB::Introspector;
 
 my $table = $introspector->find_table('users');

 print "table name is: ".$table->name."\n";
 
 foreach my $column ($table->columns) {

     print "column ".$column->name."\n";

 }
 
 foreach my $foreign_key ($table->foreign_keys) {

     print "foreign key ("
         .join(",",$foreign_key->local_column_names).") -> "
         .$foreign_key->foreign_table->name." ("
         .join(",",$foreign_key->foreign_column_names).")\n";

 }

DESCRIPTION

DB::Introspector::Base::Table is an abstract class that provides a higher level representation for a database table. This representation includes methods for discovering foreign keys, columns, and more cool stuff.

ABSTRACT METHODS

$table->primary_key

Returns: an array (@) of DB::Introspector::Base::Column instances foreach column in the primary key of this $table instance

$table->columns

Returns: an array (@) of DB::Introspector::Base::Column instances foreach column in the $table instance, whose assumed order is equivalent to that which is in the database from which they were extracted.

$table->foreign_keys

Returns: an array (@) of DB::Introspector::Base::ForeignKey instances.

$table->dependencies

Returns: an array (@) of DB::Introspector::Base::ForeignKey instances from the child tables to this table instance.

METHODS

DB::Introspector::Base::Table->new($table_name, $owner_name)

$introspector->find_table($table_name)

Params:

$table_name - the name of the table being instantiated

$owner_name - the name of the owner of the table.

Returns: a new DB::Introspector::Base::Table instance.

$table->name

Returns: the name of this table

$table->owner

Returns: the name of the owner of this table

$table->column_names

Returns: an array (@) of the names of the columns in assumed database order

$table->primary_key_column($column_name)

Returns: the DB::Introspector::Base::Column instance for the column name $column_name or undef if there exists no primary key column by that name.

$table->column($column_name)

Returns: the DB::Introspector::Base::Column instance for the column name $column_name

$table->foreign_key_names

Returns: an array (@) of the names of the foreign_keys in assumed database order

$table->foreign_key($foreign_key_name)

Returns: the DB::Introspector::Base::ForeignKey instance for the foreign_key name $foreign_key_name

$table->is_primary_key_column($column)

Param:

$column - DB::Introspector::Base::Column instance

Returns: 1 if $column is a primary key column and 0 otherwise.

$table->is_primary_key_column_name($column_name)

Returns: 1 if $column_name is a primary key column name and 0 otherwise.

$table->non_primary_key_columns

Returns: an array (@) of non primary key columns

SEE ALSO

the DB::Introspector manpage

the DB::Introspector::Base::Column manpage

the DB::Introspector::Base::ForeignKey manpage

AUTHOR

Masahji C. Stewart

COPYRIGHT

The DB::Introspector::Base::Table module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.