Add 2 metrics in jdbc scan node profile: - `CallJniNextTime`: call get next from jdbc result set - `ConvertBatchTime`: call convert jobject to columm block Also fix a potential concurrency issue when init jdbc connection cache pool
Add 2 metrics in jdbc scan node profile: - `CallJniNextTime`: call get next from jdbc result set - `ConvertBatchTime`: call convert jobject to columm block Also fix a potential concurrency issue when init jdbc connection cache pool