diff --git a/var/Typecho/Db.php b/var/Typecho/Db.php
index aa1ceaea..547d9ccb 100644
--- a/var/Typecho/Db.php
+++ b/var/Typecho/Db.php
@@ -129,6 +129,14 @@ class Db
         $this->adapter = new $adapterName();
     }
 
+    /**
+     * @return Adapter
+     */
+    public function getAdapter(): Adapter
+    {
+        return $this->adapter;
+    }
+
     /**
      * 获取适配器名称
      *
diff --git a/var/Typecho/Db/Adapter.php b/var/Typecho/Db/Adapter.php
index 907b766c..6ab95e7b 100644
--- a/var/Typecho/Db/Adapter.php
+++ b/var/Typecho/Db/Adapter.php
@@ -37,6 +37,13 @@ interface Adapter
      */
     public function getVersion($handle): string;
 
+    /**
+     * 获取数据库类型
+     *
+     * @return string
+     */
+    public function getDriver(): string;
+
     /**
      * 清空数据表
      *
diff --git a/var/Typecho/Db/Adapter/MysqlTrait.php b/var/Typecho/Db/Adapter/MysqlTrait.php
index a71ed3c1..5b123615 100644
--- a/var/Typecho/Db/Adapter/MysqlTrait.php
+++ b/var/Typecho/Db/Adapter/MysqlTrait.php
@@ -29,4 +29,12 @@ trait MysqlTrait
     {
         return $this->buildQuery($sql);
     }
+
+    /**
+     * @return string
+     */
+    public function getDriver(): string
+    {
+        return 'mysql';
+    }
 }
diff --git a/var/Typecho/Db/Adapter/Mysqli.php b/var/Typecho/Db/Adapter/Mysqli.php
index 8754e910..c2121955 100644
--- a/var/Typecho/Db/Adapter/Mysqli.php
+++ b/var/Typecho/Db/Adapter/Mysqli.php
@@ -75,7 +75,7 @@ class Mysqli implements Adapter
      */
     public function getVersion($handle): string
     {
-        return 'mysqli:mysql ' . $this->dbLink->server_version;
+        return $this->dbLink->server_version;
     }
 
     /**
diff --git a/var/Typecho/Db/Adapter/Pdo.php b/var/Typecho/Db/Adapter/Pdo.php
index 4f957982..3041c55c 100644
--- a/var/Typecho/Db/Adapter/Pdo.php
+++ b/var/Typecho/Db/Adapter/Pdo.php
@@ -81,8 +81,7 @@ abstract class Pdo implements Adapter
      */
     public function getVersion($handle): string
     {
-        return 'pdo:' . $handle->getAttribute(\PDO::ATTR_DRIVER_NAME)
-            . ' ' . $handle->getAttribute(\PDO::ATTR_SERVER_VERSION);
+        return $handle->getAttribute(\PDO::ATTR_SERVER_VERSION);
     }
 
     /**
diff --git a/var/Typecho/Db/Adapter/Pgsql.php b/var/Typecho/Db/Adapter/Pgsql.php
index 66c885c3..c97d488f 100644
--- a/var/Typecho/Db/Adapter/Pgsql.php
+++ b/var/Typecho/Db/Adapter/Pgsql.php
@@ -63,7 +63,7 @@ class Pgsql implements Adapter
     public function getVersion($handle): string
     {
         $version = pg_version($handle);
-        return 'pgsql:pgsql ' . $version['server'];
+        return $version['server'];
     }
 
     /**
diff --git a/var/Typecho/Db/Adapter/PgsqlTrait.php b/var/Typecho/Db/Adapter/PgsqlTrait.php
index 1dbb03f6..21048eba 100644
--- a/var/Typecho/Db/Adapter/PgsqlTrait.php
+++ b/var/Typecho/Db/Adapter/PgsqlTrait.php
@@ -153,6 +153,14 @@ WHERE
         return 0;
     }
 
+    /**
+     * @return string
+     */
+    public function getDriver(): string
+    {
+        return 'pgsql';
+    }
+
     abstract public function query(
         string $query,
         $handle,
diff --git a/var/Typecho/Db/Adapter/SQLite.php b/var/Typecho/Db/Adapter/SQLite.php
index cc83a2d5..dd4b071f 100644
--- a/var/Typecho/Db/Adapter/SQLite.php
+++ b/var/Typecho/Db/Adapter/SQLite.php
@@ -57,7 +57,7 @@ class SQLite implements Adapter
      */
     public function getVersion($handle): string
     {
-        return 'sqlite:sqlite ' . \SQLite3::version()['versionString'];
+        return \SQLite3::version()['versionString'];
     }
 
     /**
diff --git a/var/Typecho/Db/Adapter/SQLiteTrait.php b/var/Typecho/Db/Adapter/SQLiteTrait.php
index 7a1aa1b4..a2e42f90 100644
--- a/var/Typecho/Db/Adapter/SQLiteTrait.php
+++ b/var/Typecho/Db/Adapter/SQLiteTrait.php
@@ -99,4 +99,12 @@ trait SQLiteTrait
 
         return $query;
     }
+
+    /**
+     * @return string
+     */
+    public function getDriver(): string
+    {
+        return 'sqlite';
+    }
 }
diff --git a/var/Widget/Archive.php b/var/Widget/Archive.php
index 90d699fb..b4feb260 100644
--- a/var/Widget/Archive.php
+++ b/var/Widget/Archive.php
@@ -2175,7 +2175,9 @@ class Archive extends Contents
                 $select->where("table.contents.password IS NULL OR table.contents.password = ''");
             }
 
-            $select->where('table.contents.title LIKE ? OR table.contents.text LIKE ?', $searchQuery, $searchQuery)
+            $op = $this->db->getAdapter()->getDriver() == 'pgsql' ? 'ILIKE' : 'LIKE';
+
+            $select->where("table.contents.title {$op} ? OR table.contents.text {$op} ?", $searchQuery, $searchQuery)
                 ->where('table.contents.type = ?', 'post');
         }
 
diff --git a/var/Widget/Base.php b/var/Widget/Base.php
index d843654d..e28be21f 100644
--- a/var/Widget/Base.php
+++ b/var/Widget/Base.php
@@ -4,7 +4,6 @@ namespace Widget;
 
 use Typecho\Config;
 use Typecho\Db;
-use Typecho\Plugin;
 use Typecho\Widget;
 
 if (!defined('__TYPECHO_ROOT_DIR__')) {