Support for references from different tables.

Author: udan11

src/Components/Reference.php

@@ -40,7 +40,7 @@ class Reference extends Component
     /**
      * The referenced table.
      *
-     * @var string
+     * @var Expression
      */
     public $table;
 
@@ -61,7 +61,7 @@ class Reference extends Component
     /**
      * Constructor.
      *
-     * @param string       $table   The name of the table referenced.
+     * @param Expression   $table   The name of the table referenced.
      * @param array        $columns The columns referenced.
      * @param OptionsArray $options The options.
      */
@@ -117,7 +117,15 @@ public static function parse(Parser $parser, TokensList $list, array $options =
             }
 
             if ($state === 0) {
-                $ret->table = $token->value;
+                $ret->table = Expression::parse(
+                    $parser,
+                    $list,
+                    array(
+                        'noAlias' => true,
+                        'skipColumn' => true,
+                        'noBrackets' => true,
+                    )
+                );
                 $state = 1;
             } elseif ($state === 1) {
                 $ret->columns = ArrayObj::parse($parser, $list)->values;
@@ -143,7 +151,7 @@ public static function parse(Parser $parser, TokensList $list, array $options =
     public static function build($component, array $options = array())
     {
         return trim(
-            Context::escape($component->table)
+            $component->table
             . ' (' . implode(', ', Context::escape($component->columns)) . ') '
             . $component->options
         );

src/Utils/Table.php

@@ -56,7 +56,8 @@ public static function getForeignKeys($statement)
             );
 
             if (!empty($field->references)) {
-                $tmp['ref_table_name'] = $field->references->table;
+                $tmp['ref_db_name'] = $field->references->table->database;
+                $tmp['ref_table_name'] = $field->references->table->table;
                 $tmp['ref_index_list'] = $field->references->columns;
 
                 if (($opt = $field->references->options->has('ON UPDATE'))) {

tests/Components/ReferenceTest.php

@@ -3,6 +3,7 @@
 namespace SqlParser\Tests\Components;
 
 use SqlParser\Parser;
+use SqlParser\Components\Expression;
 use SqlParser\Components\Reference;
 
 use SqlParser\Tests\TestCase;
@@ -13,13 +14,13 @@ class ReferenceTest extends TestCase
     public function testParse()
     {
         $component = Reference::parse(new Parser(), $this->getTokensList('tbl (id)'));
-        $this->assertEquals('tbl', $component->table);
+        $this->assertEquals('tbl', $component->table->table);
         $this->assertEquals(array('id'), $component->columns);
     }
 
     public function testBuild()
     {
-        $component = new Reference('tbl', array('id'));
+        $component = new Reference(new Expression('`tbl`'), array('id'));
         $this->assertEquals('`tbl` (`id`)', Reference::build($component));
     }
 }

tests/Utils/TableTest.php

@@ -47,13 +47,15 @@ public function getForeignKeysProvider()
                     array(
                         'constraint' => 'fk_payment_customer',
                         'index_list' => array('customer_id'),
+                        'ref_db_name' => null,
                         'ref_table_name' => 'customer',
                         'ref_index_list' => array('customer_id'),
                         'on_update' => 'CASCADE',
                     ),
                     array(
                         'constraint' => 'fk_payment_rental',
                         'index_list' => array('rental_id'),
+                        'ref_db_name' => null,
                         'ref_table_name' => 'rental',
                         'ref_index_list' => array('rental_id'),
                         'on_delete' => 'SET_NULL',
@@ -62,6 +64,7 @@ public function getForeignKeysProvider()
                     array(
                         'constraint' => 'fk_payment_staff',
                         'index_list' => array('staff_id'),
+                        'ref_db_name' => null,
                         'ref_table_name' => 'staff',
                         'ref_index_list' => array('staff_id'),
                         'on_update' => 'CASCADE',
@@ -97,6 +100,7 @@ public function getForeignKeysProvider()
                     array(
                         'constraint' => 'fk_address_city',
                         'index_list' => array('city_id'),
+                        'ref_db_name' => null,
                         'ref_table_name' => 'city',
                         'ref_index_list' => array('city_id'),
                         'on_update' => 'CASCADE',