static int replace_table_table(THD *thd, GRANT_TABLE *grant_table,
			       TABLE *table, const LEX_USER &combo,
			       const char *db, const char *table_name,
			       ulong rights, ulong col_rights,
			       bool revoke_grant)
{
  char grantor[USER_HOST_BUFF_SIZE];
  int old_row_exists = 1;
  int error=0;
  ulong store_table_rights, store_col_rights;
  uchar user_key[MAX_KEY_LENGTH];
  DBUG_ENTER("replace_table_table");

  get_grantor(thd, grantor);
  /*
    The following should always succeed as new users are created before
    this function is called!
  */
  if (!find_acl_user(combo.host.str,combo.user.str, FALSE))
  {
    my_message(ER_PASSWORD_NO_MATCH, ER(ER_PASSWORD_NO_MATCH),
               MYF(0));	/* purecov: deadcode */
    DBUG_RETURN(-1);				/* purecov: deadcode */
  }

  table->use_all_columns();
  restore_record(table, s->default_values);     // Get empty record
  table->field[0]->store(combo.host.str,combo.host.length,
                         system_charset_info);
  table->field[1]->store(db,(uint) strlen(db), system_charset_info);
  table->field[2]->store(combo.user.str,combo.user.length,
                         system_charset_info);
  table->field[3]->store(table_name,(uint) strlen(table_name),
                         system_charset_info);
  store_record(table,record[1]);			// store at pos 1
  key_copy(user_key, table->record[0], table->key_info,
           table->key_info->key_length);

  if (table->file->ha_index_read_idx_map(table->record[0], 0, user_key,
                                         HA_WHOLE_KEY,
                                         HA_READ_KEY_EXACT))
  {
    /*
      The following should never happen as we first check the in memory
      grant tables for the user.  There is however always a small change that
      the user has modified the grant tables directly.
    */
    if (revoke_grant)
    { // no row, no revoke
      my_error(ER_NONEXISTING_TABLE_GRANT, MYF(0),
               combo.user.str, combo.host.str,
               table_name);		        /* purecov: deadcode */
      DBUG_RETURN(-1);				/* purecov: deadcode */
    }
    old_row_exists = 0;
    restore_record(table,record[1]);			// Get saved record
  }

  store_table_rights= get_rights_for_table(rights);
  store_col_rights=   get_rights_for_column(col_rights);
  if (old_row_exists)
  {
    ulong j,k;
    store_record(table,record[1]);
    j = (ulong) table->field[6]->val_int();
    k = (ulong) table->field[7]->val_int();

    if (revoke_grant)
    {
      /* column rights are already fixed in mysql_table_grant */
      store_table_rights=j & ~store_table_rights;
    }
    else
    {
      store_table_rights|= j;
      store_col_rights|=   k;
    }
  }

  table->field[4]->store(grantor,(uint) strlen(grantor), system_charset_info);
  table->field[6]->store((longlong) store_table_rights, TRUE);
  table->field[7]->store((longlong) store_col_rights, TRUE);
  rights=fix_rights_for_table(store_table_rights);
  col_rights=fix_rights_for_column(store_col_rights);

  if (old_row_exists)
  {
    if (store_table_rights || store_col_rights)
    {
      if ((error=table->file->ha_update_row(table->record[1],
                                            table->record[0])) &&
          error != HA_ERR_RECORD_IS_THE_SAME)
	goto table_error;			/* purecov: deadcode */
    }
    else if ((error = table->file->ha_delete_row(table->record[1])))
      goto table_error;				/* purecov: deadcode */
  }
  else
  {
    error=table->file->ha_write_row(table->record[0]);
    if (table->file->is_fatal_error(error, HA_CHECK_DUP_KEY))
      goto table_error;				/* purecov: deadcode */
  }

  if (rights | col_rights)
  {
    grant_table->privs= rights;
    grant_table->cols=	col_rights;
  }
  else
  {
    my_hash_delete(&column_priv_hash,(uchar*) grant_table);
  }
  DBUG_RETURN(0);

  /* This should never happen */
table_error:
  table->file->print_error(error,MYF(0)); /* purecov: deadcode */
  DBUG_RETURN(-1); /* purecov: deadcode */
}
Unknown