diff --git a/hikyuu/utilities/db_connect/DBUpgrade.cpp b/hikyuu/utilities/db_connect/DBUpgrade.cpp
index cf0211d..8f3e247 100644
--- a/hikyuu/utilities/db_connect/DBUpgrade.cpp
+++ b/hikyuu/utilities/db_connect/DBUpgrade.cpp
@@ -25,25 +25,15 @@ namespace hku {
 
 #if HKU_ENABLE_SQLITE
 static bool isSQLite(DBConnectBase *db) {
-    try {
-        SQLiteConnect *sqlite = dynamic_cast<SQLiteConnect *>(db);
-        return true;
-    } catch (...) {
-        // do nothing
-    }
-    return false;
+    SQLiteConnect *sqlite = dynamic_cast<SQLiteConnect *>(db);
+    return sqlite != nullptr;
 }
 #endif
 
 #if HKU_ENABLE_MYSQL
 static bool isMySQL(DBConnectBase *db) {
-    try {
-        MySQLConnect *mysql = dynamic_cast<MySQLConnect *>(db);
-        return true;
-    } catch (...) {
-        // do nothing
-    }
-    return false;
+    MySQLConnect *mysql = dynamic_cast<MySQLConnect *>(db);
+    return mysql != nullptr;
 }
 #endif
 
diff --git a/hikyuu/utilities/db_connect/mysql/MySQLConnect.cpp b/hikyuu/utilities/db_connect/mysql/MySQLConnect.cpp
index e64ad5d..c0c646d 100755
--- a/hikyuu/utilities/db_connect/mysql/MySQLConnect.cpp
+++ b/hikyuu/utilities/db_connect/mysql/MySQLConnect.cpp
@@ -124,12 +124,12 @@ int64_t MySQLConnect::exec(const std::string& sql_string) {
         if (ping()) {
             ret = mysql_query(m_mysql, sql_string.c_str());
         } else {
-            SQL_THROW(ret, "SQL error：{}! error msg: {}", sql_string, mysql_error(m_mysql));
+            SQL_THROW(ret, "SQL error: {}! error msg: {}", sql_string, mysql_error(m_mysql));
         }
     }
 
     if (ret) {
-        SQL_THROW(ret, "SQL error：{}! error msg: {}", sql_string, mysql_error(m_mysql));
+        SQL_THROW(ret, "SQL error: {}! error msg: {}", sql_string, mysql_error(m_mysql));
     }
 
     int64_t affect_rows = mysql_affected_rows(m_mysql);
diff --git a/release.md b/release.md
index 928131e..f5befd1 100644
--- a/release.md
+++ b/release.md
@@ -2,6 +2,7 @@
 
 ## 1.1.0 -
 
+fixed DBUpgrade 判断 sqlite 还是 mysql 示例
 
 ## 1.0.9 - 2024年10月20日