MySQL存储过程：跨服务器同步数据 - 示例与优化

{"title":"MySQL存储过程：跨服务器同步数据 - 示例与优化","description":"本文介绍了一个MySQL存储过程，用于将数据从一个MySQL服务器同步到另一个服务器，并提供了示例代码和优化建议。","keywords":"MySQL存储过程, 数据同步, 跨服务器, 优化, 示例代码","content":""DELIMITER //\nCREATE PROCEDURE `sp_copy_arch_cubicscanner_to_wms`(\n IN old_table VARCHAR(50),\n IN new_table VARCHAR(50),\n IN sync_table VARCHAR(50),\n IN record_type VARCHAR(50),\n IN target_ip VARCHAR(15),\n IN target_username VARCHAR(50),\n IN target_password VARCHAR(50),\n IN target_database VARCHAR(50)\n)\nBEGIN\n SET @old_table := old_table;\n SET @new_table := new_table;\n SET @sync_table := sync_table;\n SET @record_type := record_type;\n SET @target_ip := target_ip;\n SET @target_username := target_username;\n SET @target_password := target_password;\n SET @target_database := target_database;\n SET @last_sync_date_time := "1970-01-01 00:00:01";\n\n -- 获取最新同步时间\n SET @get_sync_time_sql := CONCAT("SELECT @last_sync_date_time := IFNULL(MIN(lastSyncDateTime), @last_sync_date_time) \n FROM ", @sync_table, " WHERE recordType = @record_type");\n PREPARE get_sync_time_sql FROM @get_sync_time_sql;\n\n -- 连接到目标数据库\n SET @connect_target_db_sql := CONCAT("SELECT @connection := CONCAT('mysql -h', @target_ip, ' -u', @target_username, ' -p', @target_password, ' ", @target_database, '"')");\n PREPARE connect_target_db_sql FROM @connect_target_db_sql;\n\n -- 批量插入新表数据\n SET @insert_new_table_sql := CONCAT("SELECT * FROM ", @old_table, " WHERE lastUpdateData >= @last_sync_date_time LIMIT 1000 INTO OUTFILE '/tmp/temp_data.csv' FIELDS TERMINATED BY ','");\n PREPARE insert_new_table_sql FROM @insert_new_table_sql;\n\n -- 导入数据到目标数据库\n SET @import_data_sql := "LOAD DATA INFILE '/tmp/temp_data.csv' INTO TABLE temp_table FIELDS TERMINATED BY ','";\n PREPARE import_data_sql FROM @import_data_sql;\n\n -- 更新同步后数据时间\n SET @update_new_table_sql := CONCAT("SELECT @last_sync_date_time := IFNULL(MAX(lastUpdateData), @last_sync_date_time) \n FROM ", @new_table, " WHERE lastUpdateData >= @last_sync_date_time");\n PREPARE update_new_table_sql FROM @update_new_table_sql;\n\n -- 更新sync时间\n SET @update_sync_time_sql := CONCAT("REPLACE INTO ", @sync_table, " (recordType, lastSyncDateTime) VALUES (@record_type, @last_sync_date_time)");\n PREPARE update_sync_time_sql FROM @update_sync_time_sql;\n\n -- 断开目标数据库连接\n SET @disconnect_target_db_sql := "SELECT @connection := ''";\n PREPARE disconnect_target_db_sql FROM @disconnect_target_db_sql;\n\n -- 执行存储过程\n EXECUTE get_sync_time_sql;\n\n -- 连接目标数据库\n EXECUTE connect_target_db_sql;\n\n -- 批量插入新表数据\n EXECUTE insert_new_table_sql;\n\n -- 导入数据到目标数据库\n EXECUTE import_data_sql;\n\n -- 更新同步后数据时间\n EXECUTE update_new_table_sql;\n\n -- 更新sync时间\n EXECUTE update_sync_time_sql;\n\n -- 断开目标数据库连接\n EXECUTE disconnect_target_db_sql;\n\n -- 清理临时文件\n DROP TABLE IF EXISTS temp_table;\n\n -- 更新目标数据库中的数据\n UPDATE ", @target_database, " .cubicscanner_to_wms SET WMS_READ = 0 WHERE WMS_READ = 1;\n\n -- 结束存储过程\nEND //\nDELIMITER ;\n"}