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Add result set buffering to MySQLBackend

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The backend MySQL protocol module now supports a new routing capability
which allows result sets to be gathered into one buffer before they are
routed onward. This should not be used by modules that expect large
result sets as the result set is buffered in memory.

Adding a limit on how large of a result set could be buffered would allow
relatively safe use of this routing capability without compromising the
stability of the system.
This commit is contained in:
Markus Makela
2016-12-11 12:24:25 +02:00
parent d543ecb483
commit 106f482f45
5 changed files with 52 additions and 3 deletions
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2
server/modules/routing/binlogrouter/blr.c
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@ -1846,7 +1846,7 @@ static void rses_end_locked_router_action(ROUTER_SLAVE *rses)
static uint64_t getCapabilities(void)
{
return RCAP_TYPE_NO_RSESSION | RCAP_TYPE_CONTIGUOUS_OUTPUT;
return RCAP_TYPE_NO_RSESSION | RCAP_TYPE_CONTIGUOUS_OUTPUT | RCAP_TYPE_RESULTSET_OUTPUT;
}
/**