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Complementary fix to #694,http://bugs.mariadb.com/show_bug.cgi?id=694

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RWSplit router handles query processing errors that happened in router by sending parse error reply to client. routeQuery fails only when backend has failed.
This commit is contained in:
VilhoRaatikka
2015-01-17 22:40:52 +02:00
parent d362ed227f
commit 6d2b38d4b6
6 changed files with 106 additions and 36 deletions
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28
server/modules/routing/readwritesplit/readwritesplit.c
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@ -1972,7 +1972,16 @@ retblock:
}
/**
* Routing function. Find out query type, backend type, and target DCB(s).
* Then route query to found target(s).
* @param inst router instance
* @param rses router session
* @param querybuf GWBUF including the query
*
* @return true if routing succeed or if it failed due to unsupported query.
* false if backend failure was encountered.
*/
static bool route_single_stmt(
ROUTER_INSTANCE* inst,
ROUTER_CLIENT_SES* rses,
@ -2162,6 +2171,8 @@ static bool route_single_stmt(
if (TARGET_IS_MASTER(route_target) ||
TARGET_IS_SLAVE(route_target))
{
backend_ref_t* bref = rses->rses_backend_ref;
char* query_str = modutil_get_query(querybuf);
char* qtype_str = skygw_get_qtype_str(qtype);
@ -2181,9 +2192,22 @@ static bool route_single_stmt(
"modification from other "
"servers. <")));
while (bref != NULL && !BREF_IS_IN_USE(bref))
{
bref++;
}
if (bref != NULL && BREF_IS_IN_USE(bref))
{
modutil_reply_parse_error(
bref->bref_dcb,
strdup("Routing query to backend failed. "
"See the error log for further "
"details."));
}
if (query_str) free (query_str);
if (qtype_str) free(qtype_str);
succp = false;
succp = true;
goto retblock;
}
/**