Support for Postgres SET NULL, SET DEFAULT, and NO ACTION foreign key detection in the PostgresSQLSchema Manager

[richardfullmer]

Previous regex was incorrectly parsing these values and would only pull the first word, causing DBAL to php fatal error later when it cannot match "SET" to "SET NULL"

[beberlei]

Can you give some examples in the comments? I could write an additional test then.

[richardfullmer]

From our implementation

$tableForeignKey['conname'] = 'order_product_type_fkey';
$tableForeignKey['condef'] = 'FOREIGN KEY (product_type) REFERENCES product_types(id) ON UPDATE CASCADE ON DELETE SET NULL';

$fkey = $pgSchemaManager->_getPortableTableForeignKeyDefinition($tableForeignKey);

expect

$fkey->onDelete() == 'SET NULL';   // (previously $fkey->onDelete() would return 'SET')  
$fkey->onUpdate() == 'CASCADE';