NAME

       Parse::Dia::SQL::Output::SQLite3fk - Create SQL for SQLite version 3, with foreign key
       support

SYNOPSIS

           use Parse::Dia::SQL;
           my $dia = Parse::Dia::SQL->new(file => 'foo.dia', db => 'sqlite3fk');
           print $dia->get_sql();

DESCRIPTION

       This sub-class creates SQL for the SQLite database version 3.

   new
       The constructor.

       Object names in SQLite have no inherent limit. 60 has been arbitrarily chosen.

   _get_create_table_sql
       Generate create table statement for a single table using SQLite syntax:

       Includes class comments before the table definition.

       Includes autoupdate triggers based on the class comment.

       Includes foreign key support of the form

         foreign key(thisColumn)  references thatTable(thatColumn) {action}

       Where {action} is the optional contraint condition, such as 'on delete cascade' exactly as
       entered in the diagram.

       autoupdate triggers

       If the class comment includes a line like:

       <autoupdate:foo/>

       Then an 'after update' trigger is generated for this table which executes the statement
       foo for the updated row.

       Examples of use include tracking record modification dates
       ("<autoupdate:dtModified=datetime('now')/">) or deriving a value from another field
       ("<autoupdate:sSoundex=soundex(sName)/">)

   _create_pk_string
       Override default functon to include foreign key clauses

   get_schema_drop
       Generate drop table statments for all tables using SQLite syntax:

         drop table {foo} if exists

   get_view_drop
       Generate drop view statments for all tables using SQLite syntax:

         drop view {foo} if exists

   _get_fk_drop
       Foreign key enforcement is embedded in the table definitions for SQLite, so no output is
       required here.

   _get_drop_index_sql
       drop index statement using SQLite syntax:

         drop index {foo} if exists

   get_permissions_create
       SQLite doesn't support permissions, so suppress this output.

   get_permissions_drop
       SQLite doesn't support permissions, so suppress this output.

   _get_create_association_sql
       Foreign key enforcement is embedded in the table definitions for SQLite, so no output is
       required here.

TODO

       Things that might get added in future versions:

       Views

       Views haven't been tested. They might already work, but who knows...

       Other stuff

       Bugs etc