diff --git a/module/bi/model.php b/module/bi/model.php
index 7b572af76e..0a1d9f872e 100644
--- a/module/bi/model.php
+++ b/module/bi/model.php
@@ -1367,79 +1367,148 @@ class biModel extends model
     }
 
     /**
-     * Query sql.
+     * 下载duckdb引擎。
+     * Download duckdb.
      *
-     * @param  string    $sql
-     * @param  int    $recPerPage
-     * @param  int    $pageID
      * @access public
-     * @return object
+     * @return string
      */
-    /*
-    public function querySql($sql, $recPerPage = 100, $pageID = 1)
+    public function downloadDuckdb(): string
     {
-        $queryResult = new stdclass();
-        $queryResult->error    = false;
-        $queryResult->errorMsg = '';
-        $queryResult->cols     = array();
-        $queryResult->rows     = array();
-        $queryResult->sql      = '';
-        $queryResult->fieldSettings = array();
+        $checkDuckdb    = $this->updateDownloadingTagFile('file', 'check');
+        $checkExtension = $this->updateDownloadingTagFile('extension', 'check');
 
-        $sql = $this->processVars($sql);
+        if($checkDuckdb == 'loading' || $checkExtension == 'loading') return 'loading';
 
-        $statement = $this->sql2Statement($sql);
-        if(is_string($statement))
-        {
-            $queryResult->error    = true;
-            $queryResult->errorMsg = $statement;
+        $this->loadModel('bi');
+        $binRoot   = $this->app->getTmpRoot() . 'duckdb' . DS;
+        $duckdbBin = $this->getDuckdbBinConfig();
 
-            return $queryResult;
-        }
+        $duckdbUrl    = $duckdbBin['fileUrl'];
+        $extensionUrl = $duckdbBin['extensionUrl'];
 
-        $checked = $this->validateSql($sql);
-        if($checked !== true)
-        {
-            $queryResult->error    = true;
-            $queryResult->errorMsg = $checked;
+        $this->updateDownloadingTagFile('file', 'create');
+        $this->updateDownloadingTagFile('extension', 'create');
 
-            return $queryResult;
-        }
+        $downloadDuckdb    = $this->downloadFile($duckdbUrl, $binRoot, $duckdbBin['file']);
+        $downloadExtension = $this->downloadFile($extensionUrl, $binRoot, $duckdbBin['extension']);
 
-        $limitSql = $this->prepareSqlPager($statement, $recPerPage, $pageID);
+        $this->updateDownloadingTagFile('file', 'remove');
+        $this->updateDownloadingTagFile('extension', 'remove');
 
-        try
+        return $downloadDuckdb && $downloadExtension ? 'ok' : 'fail';
+    }
+
+    /**
+     * 更新tab文件下载状态。
+     * Update downloading tab file status.
+     *
+     * @param  string $type
+     * @param  string $action
+     * @access public
+     * @return string
+     */
+    public function updateDownloadingTagFile(string $type = 'file', string $action = 'create'): string
+    {
+        $downloading = '.downloading';
+        $binRoot     = $this->app->getTmpRoot() . 'duckdb' . DS;
+        $duckdbBin   = $this->getDuckdbBinConfig();
+        $file        = $binRoot . $duckdbBin[$type];
+        $tagFile     = $file . $downloading;
+
+        if($action == 'create')
+        {
+            if(file_exists($tagFile)) return 'fail';
+            file_put_contents($tagFile, 'Downloading...');
+            return 'ok';
+        }
+
+        if($action == 'check')
         {
-            $queryResult->rows      = $this->dbh->query($limitSql)->fetchAll();
-            $queryResult->rowsCount = $this->dbh->query("SELECT FOUND_ROWS() as count")->fetch()->count;
+            if(file_exists($file)) return 'ok';
+            if(file_exists($tagFile)) return 'loading';
+            return 'fail';
         }
-        catch(Exception $e)
+        if($action == 'remove')
         {
-            $queryResult->error = true;
-            $queryResult->errorMsg = $e;
+            if(!file_exists($tagFile)) return 'fail';
+            unlink($tagFile);
+        }
+        return 'ok';
+    }
+
+    /**
+     * 解压文件。
+     * Unzip file.
+     *
+     * @param  string    $path
+     * @param  string    $file
+     * @param  string    $extractFile
+     * @access public
+     * @return bool
+     */
+    public function unzipFile(string $path, string $file, string $extractFile): bool
+    {
+        $this->app->loadClass('pclzip', true);
+        $zip = new pclzip($file);
+
+        /* 限制解压的文件内容以阻止 ZIP 解压缩的目录穿越漏洞。*/
+        /* Limit the file content to prevent the directory traversal vulnerability of ZIP decompression. */
+        $extractFiles = array($extractFile);
+        return $zip->extract(PCLZIP_OPT_PATH, $path, PCLZIP_OPT_BY_NAME, $extractFiles) === 0;
+    }
 
-            return $queryResult;
+    /**
+     * 下载文件。
+     * Download file.
+     *
+     * @param  string    $url
+     * @param  string    $savePath
+     * @param  string    $finalFile
+     * @access public
+     * @return bool
+     */
+    public function downloadFile(string $url, string $savePath, string $finalFile): bool
+    {
+        $ch = curl_init($url);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
+        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
+        $fileContents = curl_exec($ch);
+
+        if (curl_errno($ch))
+        {
+            curl_close($ch);
+            return false;
         }
 
-        $columns    = $this->prepareColumns($limitSql, $statement);
-        $clientLang = $this->app->getClientLang();
+        $result = json_decode($fileContents, true);
+        if(isset($result['error']))
+        {
+            curl_close($ch);
+            return false;
+        }
 
-        $fieldSettings = array();
-        foreach($columns as $field => $settings)
+        $filename = basename($url);
+        $filename = $savePath . $filename;
+        $result   = file_put_contents($filename, $fileContents);
+        if($result === false)
         {
-            $title = $settings['name'];
+            curl_close($ch);
+            return false;
+        }
+
+        curl_close($ch);
+        chmod($filename, 0755);
 
-            if(!isset($settings[$clientLang]) || empty($settings[$clientLang])) $settings[$clientLang] = $title;
-            $fieldSettings[$field] = $settings;
+        if(pathinfo($filename, PATHINFO_EXTENSION) === 'zip')
+        {
+            $this->unzipFile($savePath, $filename, $finalFile);
+            unlink($filename);
         }
-
-        $queryResult->cols          = $this->buildQueryResultTableColumns($fieldSettings);
-        $queryResult->fieldSettings = $fieldSettings;
-        $queryResult->sql           = $limitSql;
 
-        return $queryResult;
+        return chmod($savePath . $finalFile, 0755);
     }
-    */
 
     /**
      * Encode json.
diff --git a/module/install/control.php b/module/install/control.php
index 03828fd787..ef27887bbf 100644
--- a/module/install/control.php
+++ b/module/install/control.php
@@ -99,8 +99,9 @@ class install extends control
         $this->view->dataRootResult = $this->installZen->checkDataRoot();
         $this->view->iniInfo        = $this->install->getIniInfo();
 
-        $checkDuckdb    = $this->updateDownloadingTagFile('file', 'check');
-        $checkExtension = $this->updateDownloadingTagFile('extension', 'check');
+        $this->loadModel('bi');
+        $checkDuckdb    = $this->bi->updateDownloadingTagFile('file', 'check');
+        $checkExtension = $this->bi->updateDownloadingTagFile('extension', 'check');
         $this->view->duckdbResult = $checkDuckdb == 'ok' && $checkExtension == 'ok' ? 'ok' : 'fail';
 
         $checkSession = ini_get('session.save_handler') == 'files';
@@ -637,8 +638,9 @@ class install extends control
      */
     public function installDuckdb()
     {
-        $this->updateDownloadingTagFile('file', 'remove');
-        $this->updateDownloadingTagFile('extension', 'remove');
+        $this->loadModel('bi');
+        $this->bi->updateDownloadingTagFile('file', 'remove');
+        $this->bi->updateDownloadingTagFile('extension', 'remove');
 
         $this->view->title           = $this->lang->install->installDuckdb;
         $this->view->duckdbStatus    = 'loading';
@@ -658,7 +660,7 @@ class install extends control
         ignore_user_abort(true);
         set_time_limit(0);
         session_write_close();
-        $this->installZen->downloadDuckdb();
+        $this->loadModel('bi')->downloadDuckdb();
     }
 
     /**
@@ -670,8 +672,9 @@ class install extends control
      */
     public function ajaxCheckDuckdb()
     {
-        $checkDuckdb    = $this->updateDownloadingTagFile('file', 'check');
-        $checkExtension = $this->updateDownloadingTagFile('extension', 'check');
+        $this->loadModel('bi');
+        $checkDuckdb    = $this->bi->updateDownloadingTagFile('file', 'check');
+        $checkExtension = $this->bi->updateDownloadingTagFile('extension', 'check');
 
         echo(json_encode(array('duckdb' => $checkDuckdb, 'extension' => $checkExtension)));
     }
diff --git a/module/install/zen.php b/module/install/zen.php
index 9aa618ad40..8ecfbea52f 100644
--- a/module/install/zen.php
+++ b/module/install/zen.php
@@ -249,152 +249,6 @@ class installZen extends install
         return is_dir($dataRoot) && is_writable($dataRoot) ? 'ok' : 'fail';
     }
 
-    /**
-     * 下载duckdb引擎。
-     * Download duckdb.
-     *
-     * @access protected
-     * @return string
-     */
-    protected function downloadDuckdb(): string
-    {
-        $checkDuckdb    = $this->updateDownloadingTagFile('file', 'check');
-        $checkExtension = $this->updateDownloadingTagFile('extension', 'check');
-
-        if($checkDuckdb == 'loading' || $checkExtension == 'loading') return 'loading';
-
-        $this->loadModel('bi');
-        $binRoot   = $this->app->getTmpRoot() . 'duckdb' . DS;
-        $duckdbBin = $this->bi->getDuckdbBinConfig();
-
-        $duckdbUrl    = $duckdbBin['fileUrl'];
-        $extensionUrl = $duckdbBin['extensionUrl'];
-
-        $this->updateDownloadingTagFile('file', 'create');
-        $this->updateDownloadingTagFile('extension', 'create');
-
-        $downloadDuckdb    = $this->downloadFile($duckdbUrl, $binRoot, $duckdbBin['file']);
-        $downloadExtension = $this->downloadFile($extensionUrl, $binRoot, $duckdbBin['extension']);
-
-        $this->updateDownloadingTagFile('file', 'remove');
-        $this->updateDownloadingTagFile('extension', 'remove');
-
-        return $downloadDuckdb && $downloadExtension ? 'ok' : 'fail';
-    }
-
-    /**
-     * 更新tab文件下载状态。
-     * Update downloading tab file status.
-     *
-     * @param  string $type
-     * @param  string $action
-     * @access protected
-     * @return string
-     */
-    protected function updateDownloadingTagFile(string $type = 'file', string $action = 'create'): string
-    {
-        $this->loadModel('bi');
-
-        $downloading = '.downloading';
-        $binRoot     = $this->app->getTmpRoot() . 'duckdb' . DS;
-        $duckdbBin   = $this->bi->getDuckdbBinConfig();
-        $file        = $binRoot . $duckdbBin[$type];
-        $tagFile     = $file . $downloading;
-
-        if($action == 'create')
-        {
-            if(file_exists($tagFile)) return 'fail';
-            file_put_contents($tagFile, 'Downloading...');
-            return 'ok';
-        }
-
-        if($action == 'check')
-        {
-            if(file_exists($file)) return 'ok';
-            if(file_exists($tagFile)) return 'loading';
-            return 'fail';
-        }
-        if($action == 'remove')
-        {
-            if(!file_exists($tagFile)) return 'fail';
-            unlink($tagFile);
-        }
-        return 'ok';
-    }
-
-    /**
-     * 解压文件。
-     * Unzip file.
-     *
-     * @param  string    $path
-     * @param  string    $file
-     * @param  string    $extractFile
-     * @access protected
-     * @return bool
-     */
-    protected function unzipFile(string $path, string $file, string $extractFile): bool
-    {
-        $this->app->loadClass('pclzip', true);
-        $zip = new pclzip($file);
-
-        /* 限制解压的文件内容以阻止 ZIP 解压缩的目录穿越漏洞。*/
-        /* Limit the file content to prevent the directory traversal vulnerability of ZIP decompression. */
-        $extractFiles = array($extractFile);
-        return $zip->extract(PCLZIP_OPT_PATH, $path, PCLZIP_OPT_BY_NAME, $extractFiles) === 0;
-    }
-
-    /**
-     * 下载文件。
-     * Download file.
-     *
-     * @param  string    $url
-     * @param  string    $savePath
-     * @param  string    $finalFile
-     * @access protected
-     * @return bool
-     */
-    protected function downloadFile(string $url, string $savePath, string $finalFile): bool
-    {
-        $ch = curl_init($url);
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
-        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
-        $fileContents = curl_exec($ch);
-
-        if (curl_errno($ch))
-        {
-            curl_close($ch);
-            return false;
-        }
-
-        $result = json_decode($fileContents, true);
-        if(isset($result['error']))
-        {
-            curl_close($ch);
-            return false;
-        }
-
-        $filename = basename($url);
-        $filename = $savePath . $filename;
-        $result   = file_put_contents($filename, $fileContents);
-        if($result === false)
-        {
-            curl_close($ch);
-            return false;
-        }
-
-        curl_close($ch);
-        chmod($filename, 0755);
-
-        if(pathinfo($filename, PATHINFO_EXTENSION) === 'zip')
-        {
-            $this->unzipFile($savePath, $filename, $finalFile);
-            unlink($filename);
-        }
-
-        return chmod($savePath . $finalFile, 0755);
-    }
-
     /**
      * 检查数据库配置信息的正确性。
      * Check config ok or not.