Function open_log_table

sql/sql_base.cc:10002–10031

Open a log table. Opening such tables is performed internally in the server implementation, and is a 'nested' open, since some tables might be already opened by the current thread. The thread context before this call is saved, and is restored when calling close_log_table(). @param thd The current thread @param one_table Log table to open @param backup [out] Temporary storage used t

  @param backup [out] Temporary storage used to save the thread context
*/
TABLE *
open_log_table(THD *thd, TABLE_LIST *one_table, Open_tables_backup *backup)
{
  uint flags= ( MYSQL_OPEN_IGNORE_GLOBAL_READ_LOCK |
                MYSQL_LOCK_IGNORE_GLOBAL_READ_ONLY |
                MYSQL_OPEN_IGNORE_FLUSH |
                MYSQL_LOCK_IGNORE_TIMEOUT |
                MYSQL_LOCK_LOG_TABLE);
  TABLE *table;
  /* Save value that is changed in mysql_lock_tables() */
  ulonglong save_utime_after_lock= thd->utime_after_lock;
  DBUG_ENTER("open_log_table");

  thd->reset_n_backup_open_tables_state(backup);

  if ((table= open_ltable(thd, one_table, one_table->lock_type, flags)))
  {
    DBUG_ASSERT(table->s->table_category == TABLE_CATEGORY_LOG);
    DBUG_ASSERT(!table->file->row_logging);

    /* Make sure all columns get assigned to a default value */
    table->use_all_columns();
    DBUG_ASSERT(table->s->no_replicate);
  }
  else
    thd->restore_backup_open_tables_state(backup);

  thd->utime_after_lock= save_utime_after_lock;
  DBUG_RETURN(table);
}

/**
  Close a log table.