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Message #04719
Re: MDEV-225: Replace with dummy events an event that is not understood by a slave to which it should be sent
Michael Widenius <monty@xxxxxxxxxxxx> writes:
> Kristian> And STRING_WITH_LEN(...) expands to two expressions with a comma between them
> Kristian> UUU, VVV - so I also cannot put DBUG_EVALUATE_IF() around STRING_WITH_LEN().
>
> Kristian> I rewrote it to use strlen() instead of STRING_WITH_LEN - this code is not
> Kristian> performance critical:
>
> I prefer to get rid of strlen() at all.
> Jani has a long going task to go trough the server and remove all
> strlen() adding a strlen() will cause more work for him sooner or
> later...
This is the code:
const char *q=
DBUG_EVALUATE_IF("simulate_slave_capability_old_53",
"SET @mariadb_slave_capability="
STRINGIFY_ARG(MARIA_SLAVE_CAPABILITY_ANNOTATE),
"SET @mariadb_slave_capability="
STRINGIFY_ARG(MARIA_SLAVE_CAPABILITY_MINE));
if (mysql_real_query(mysql, q, strlen(q)))
So what do you suggest? Go back to the original code that Serg did not like?
int rc= DBUG_EVALUATE_IF("simulate_slave_capability_old_53",
mysql_real_query(mysql, STRING_WITH_LEN("SET @mariadb_slave_capability="
STRINGIFY_ARG(MARIA_SLAVE_CAPABILITY_ANNOTATE))),
mysql_real_query(mysql, STRING_WITH_LEN("SET @mariadb_slave_capability="
STRINGIFY_ARG(MARIA_SLAVE_CAPABILITY_MINE))));
if (rc)
Or do you have a better idea?
- Kristian.
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