diff --git a/src/main/java/com/dashboard/aws/lambda/handler/MySQLToS3Handler.java b/src/main/java/com/dashboard/aws/lambda/handler/MySQLToS3Handler.java
deleted file mode 100644
index 0309fb3..0000000
--- a/src/main/java/com/dashboard/aws/lambda/handler/MySQLToS3Handler.java
+++ /dev/null
@@ -1,93 +0,0 @@
-package com.dashboard.aws.lambda.handler;
-
-import com.amazonaws.services.lambda.runtime.Context;
-import com.amazonaws.services.lambda.runtime.RequestHandler;
-import com.dashboard.aws.lambda.Constants;
-import com.dashboard.aws.lambda.service.MySQLService;
-import com.dashboard.aws.lambda.service.S3Service;
-import com.dashboard.aws.lambda.util.CsvUtil;
-import com.dashboard.aws.lambda.util.DateUtil;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.time.LocalDate;
-import java.time.ZoneId;
-import java.util.*;
-
-public class MySQLToS3Handler implements RequestHandler<Map<String, Object>, String> {
-
-    private static final Logger logger = LoggerFactory.getLogger(MySQLToS3Handler.class);
-
-    private static final String DB_SCHEMA = System.getenv("DB_SCHEMA");
-
-
-    private final MySQLService mysqlService = new MySQLService();
-    private final S3Service s3Service = new S3Service();
-
-    @Override
-    public String handleRequest(Map<String, Object> event, Context context) {
-        try {
-            ZoneId zone = ZoneId.of("Asia/Tokyo");
-            LocalDate now = DateUtil.resolveEventDate( event, zone);
-            LocalDate startDate = now.minusDays(5); // 5天前
-            LocalDate endDate = now.minusDays(3);   // 3天前
-
-            long startTs = startDate.atStartOfDay(ZoneId.of("Asia/Tokyo")).toInstant().toEpochMilli();
-            long endTs = endDate.atStartOfDay(ZoneId.of("Asia/Tokyo")).toInstant().toEpochMilli();
-
-            String schema = DB_SCHEMA;
-
-            for (String table : Constants.tables) {
-                // 查询旧数据
-                List<Map<String, Object>> rows = mysqlService.queryOldData(schema, table, startTs, endTs);
-                if (rows.isEmpty()) {
-                    logger.info("[{}][{}] no data....", schema, table);
-                    continue;
-                }
-
-                // 按年月日分组
-                Map<String, List<Map<String, Object>>> grouped = new HashMap<>();
-                for (Map<String, Object> row : rows) {
-                    int y = (int) row.get("date_year");
-                    int m = (int) row.get("date_month");
-                    int d = (int) row.get("date_day");
-                    // 格式化年月日，不足两位补0
-                    String monthStr = String.format("%02d", m);
-                    String dayStr = String.format("%02d", d);
-                    String key = String.format("%d-%s-%s", y, monthStr, dayStr);
-
-                    grouped.computeIfAbsent(key, k -> new ArrayList<>()).add(row);
-                }
-
-                // 上传每个分组
-                boolean allSuccess = true;
-                for (Map.Entry<String, List<Map<String, Object>>> entry : grouped.entrySet()) {
-                    String dateKey = entry.getKey();
-                    byte[] csvBytes = CsvUtil.toCsvBytes(entry.getValue());
-                    String s3Key = String.format("%s/%s.csv", table, dateKey);
-                    try {
-                        s3Service.upload(s3Key, csvBytes);
-                        logger.info("[{}][{}] backup success -> {}", schema, table, s3Key);
-                    } catch (Exception e) {
-                        allSuccess = false;
-                        logger.error("[{}][{}] backup failed -> {}", schema, table, s3Key, e);
-                    }
-                }
-
-                // 全部上传成功才删除数据
-                if (allSuccess) {
-                    mysqlService.deleteOldData(schema, table, startTs, endTs);
-                    logger.info("[{}][{}] delete old data", schema, table);
-                } else {
-                    logger.error("[{}][{}] not all files uploaded successfully, skip delete", schema, table);
-                }
-            }
-
-            return "backup process finished";
-
-        } catch (Exception e) {
-            logger.error("backup error", e);
-            return "backup error：" + e.getMessage();
-        }
-    }
-}
\ No newline at end of file