No, an update operation in MySQL does not insert new data into the database. The update operation is used to modify existing data within a table. It allows you to change the values of one or more columns in one
一、update跟踪执行配置使用内部程序堆栈跟踪工具path_viewer，跟踪mysql update 一行数据的执行过程，配置执行脚本：call_update.shDROP DATABASE IF EXISTS d1;CREATE DATABASE d1;use d1;drop table if exists test;CREATE TABLE test (c0 int NOT NULL AUTO_INCREMENT,c1 date DEFAULT NULL,c2 time DEFAULT N...
row_update_for_mysql row_upd_step row_upd --执行更新 btr_pcur_t::restore_position rec_get_offsets_func btr_cur_update_in_place btr_cur_upd_lock_and_undo trx_undo_report_row_operation trx_undo_create trx_undo_seg_create _fil_io Fil_shard::do_io pf...
ha_innobase::update_row: row_get_prebuilt_update_vector calc_row_difference row_update_for_mysql row_upd_step row_upd --执行更新 btr_pcur_t::restore_position rec_get_offsets_func btr_cur_update_in_place btr_cur_upd_lock_and_undo trx_undo_report_row_operation trx_undo_create trx_undo...
2trx_mysql_thread_id:1135trx_query:updatet2setname='d'whereid=1trx_operation_state:startingindexreadtrx_tables_in_use:1trx_tables_locked:1# 1个表上有行锁trx_lock_structs:2# 内存中2个锁结构trx_lock_memory_bytes:1136trx_rows_locked:1# 1行数据被锁定trx_rows_modified:0trx_concurrency_...
Apply-incremental-backup Operation Advanced: Use the apply-incremental-backup to update a backup directory with data in an incremental backup directory: mysqlbackup [STD-OPTIONS] [--incremental-backup-dir=PATH] [--backup-dir=PATH] [--limit-memory=MB] [--uncompress] [MESSAGE-LOGGING-OPTIONS]...
2023-10-012023-10-012023-10-022023-10-022023-10-032023-10-032023-10-042023-10-042023-10-052023-10-052023-10-062023-10-062023-10-07Identify target tableIdentify source tableWrite UPDATE statementWrite SELECT statementCombine statementsExecute SQLPreparationExecutionMySQL Update Select Operation ...
ha_innobase::update_row: row_get_prebuilt_update_vector calc_row_difference row_update_for_mysql row_upd_step row_upd --执行更新 btr_pcur_t::restore_position rec_get_offsets_func btr_cur_update_in_place btr_cur_upd_lock_and_undo trx_undo_report_row_operation trx_undo_create trx_undo...
Access denied; you need (at least one of) the SUPER privilege(s) for this operation 1. 登录账户没有权限,用更高级别权限的账号操作 错误信息2: Can't create federated table. The data source connection string 'mysql://xxxxxx' is not in the correct format ...
如果是数据词典操作(DDL)产生的undo,主要是表级别操作,例如创建或删除表,还需要记录操作的table id到undo log header中(TRX_UNDO_TABLE_ID),同时将TRX_UNDO_DICT_TRANS设置为TRUE。(trx_undo_mark_as_dict_operation)。 总的来说,undo header page主要包括如下信息: ...