Add support for getTableNames() method from yii\db\Schema Class

src/db/Schema.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Connect plugin for Craft CMS 3.x
+ *
+ * Allows you to connect to external databases and perform db queries
+ *
+ * @link      https://nystudio107.com/
+ * @copyright Copyright (c) 2018 nystudio107
+ */
+
+namespace nystudio107\connect\db;
+
+use yii\db\Connection;
+
+/**
+ * @author    nystudio107
+ * @package   Connect
+ * @since     1.0.0
+ */
+class Schema extends \yii\db\Schema
+{
+    // Public Methods
+    // =========================================================================
+
+    /**
+     * @inheritdoc
+     */
+    public function getTableNames($schema = '', $refresh = false)
+    {
+      return parent::getTableNames($schema, $refresh);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function quoteSimpleTableName($name = '')
+    {
+      return parent::quoteSimpleTableName($name);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function loadTableSchema($name = '')
+    {
+        return parent::loadTableSchema($name);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function findTableNames($schema = '') {
+      $sql = 'SHOW TABLES';
+      if ($schema !== '') {
+          $sql .= ' FROM ' . $this->quoteSimpleTableName($schema);
+      }
+
+      return $this->db->createCommand($sql)->queryColumn();
+    }
+}

src/variables/ConnectVariable.php

@@ -12,6 +12,7 @@
 
 use nystudio107\connect\Connect;
 use nystudio107\connect\db\Query;
+use nystudio107\connect\db\Schema;
 use nystudio107\connect\models\Settings;
 
 use Craft;
@@ -67,6 +68,20 @@ public function query($connection = null): Query
         ]);
     }
 
+    /**
+     * Returns a new generic schema.
+     *
+     * @param null|Connection $connection
+     *
+     * @return Schema
+     */
+    public function schema($connection = null): Schema
+    {
+        return new Schema([
+            'db' => $connection,
+        ]);
+    }
+
     // Protected Methods
     // =========================================================================