Code review comments.

Author: markstory

lib/Cake/Database/Schema/Collection.php

@@ -119,8 +119,7 @@ public function describe($name) {
  */
 	protected function _executeSql($sql, $params) {
 		try {
-			$statement = $this->_connection->execute($sql, $params);
-			return $statement;
+			return $this->_connection->execute($sql, $params);
 		} catch (\PDOException $e) {
 			throw new Exception($e->getMessage(), 500, $e);
 		}

lib/Cake/Database/Schema/SqliteSchema.php

@@ -231,9 +231,7 @@ protected function _convertOnClause($clause) {
 		if ($clause === 'NO ACTION') {
 			return 'none';
 		}
-		if ($clause === 'SET NULL') {
-			return null;
-		}
+		return null;
 	}
 
 /**

lib/Cake/Database/Schema/Table.php

@@ -93,8 +93,8 @@ class Table {
 		'columns' => [],
 		'length' => [],
 		'references' => [],
-		'update' => 'cascade',
-		'delete' => 'cascade',
+		'update' => 'restrict',
+		'delete' => 'restrict',
 	];
 
 /**

lib/Cake/Test/TestCase/Database/Schema/SqliteSchemaTest.php

@@ -477,25 +477,31 @@ public static function constraintSqlProvider() {
 				'author_id_idx',
 				['type' => 'foreign', 'columns' => ['author_id'], 'references' => ['authors', 'id']],
 				'CONSTRAINT "author_id_idx" FOREIGN KEY ("author_id") ' .
-				'REFERENCES "authors" ("id") ON UPDATE CASCADE ON DELETE CASCADE'
+				'REFERENCES "authors" ("id") ON UPDATE RESTRICT ON DELETE RESTRICT'
+			],
+			[
+				'author_id_idx',
+				['type' => 'foreign', 'columns' => ['author_id'], 'references' => ['authors', 'id'], 'update' => 'cascade'],
+				'CONSTRAINT "author_id_idx" FOREIGN KEY ("author_id") ' .
+				'REFERENCES "authors" ("id") ON UPDATE CASCADE ON DELETE RESTRICT'
 			],
 			[
 				'author_id_idx',
 				['type' => 'foreign', 'columns' => ['author_id'], 'references' => ['authors', 'id'], 'update' => 'restrict'],
 				'CONSTRAINT "author_id_idx" FOREIGN KEY ("author_id") ' .
-				'REFERENCES "authors" ("id") ON UPDATE RESTRICT ON DELETE CASCADE'
+				'REFERENCES "authors" ("id") ON UPDATE RESTRICT ON DELETE RESTRICT'
 			],
 			[
 				'author_id_idx',
 				['type' => 'foreign', 'columns' => ['author_id'], 'references' => ['authors', 'id'], 'update' => null],
 				'CONSTRAINT "author_id_idx" FOREIGN KEY ("author_id") ' .
-				'REFERENCES "authors" ("id") ON UPDATE SET NULL ON DELETE CASCADE'
+				'REFERENCES "authors" ("id") ON UPDATE SET NULL ON DELETE RESTRICT'
 			],
 			[
 				'author_id_idx',
 				['type' => 'foreign', 'columns' => ['author_id'], 'references' => ['authors', 'id'], 'update' => 'none'],
 				'CONSTRAINT "author_id_idx" FOREIGN KEY ("author_id") ' .
-				'REFERENCES "authors" ("id") ON UPDATE NO ACTION ON DELETE CASCADE'
+				'REFERENCES "authors" ("id") ON UPDATE NO ACTION ON DELETE RESTRICT'
 			],
 		];
 	}