InnoDB事务锁之行锁-delete流程update阶段加锁

1、介绍

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1. mysql_delete::
   
2. //rr_quick->...->row_search_for_mysql
   
3. while (!(error=info.read_record(&info)) && !thd->killed &&! thd->is_error()){
   
4. ...
   
5. //...->row_update_for_mysql
   
6. error= table->file->ha_delete_row(table->record[0]);
   
7. ...
8. }

2、加锁原理流程图