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