Fix mysqlmetaimpl (#869)

* *fix mysqlMetaImpl Initialize failed create directory

* *style: format code

* *style: format code

* *style: format code

* *style: format code

* *fix: sqliteMetaImpl Initialize failed create directory

* add empty line to trigger CI

core/src/db/meta/MySQLMetaImpl.cpp

@@ -254,7 +254,7 @@ MySQLMetaImpl::Initialize() {
         if (!ret) {
             std::string msg = "Failed to create db directory " + options_.path_;
             ENGINE_LOG_ERROR << msg;
-            return Status(DB_META_TRANSACTION_FAILED, msg);
+            throw Exception(DB_META_TRANSACTION_FAILED, msg);
         }
     }
 

core/src/db/meta/SqliteMetaImpl.cpp

@@ -143,7 +143,7 @@ SqliteMetaImpl::Initialize() {
         if (!ret) {
             std::string msg = "Failed to create db directory " + options_.path_;
             ENGINE_LOG_ERROR << msg;
-            return Status(DB_INVALID_PATH, msg);
+            throw Exception(DB_INVALID_PATH, msg);
         }
     }
 

core/unittest/db/test_db.cpp

@@ -40,6 +40,7 @@ static constexpr int64_t INSERT_LOOP = 1000;
 static constexpr int64_t SECONDS_EACH_HOUR = 3600;
 static constexpr int64_t DAY_SECONDS = 24 * 60 * 60;
 
+
 milvus::engine::meta::TableSchema
 BuildTableSchema() {
     milvus::engine::meta::TableSchema table_info;