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Fix to bug 729: http://bugs.mariadb.com/show_bug.cgi?id=729

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Prepared statements with a SELECT statement were falsely detected as SELECT queries with session variable modification.
This caused the error message and the failure to route the query.
This commit is contained in:
Markus Makela 2015-02-17 18:29:24 +02:00
parent a148861d62
commit dc65c9e1cc
1 changed files with 12 additions and 1 deletions
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13
server/modules/routing/readwritesplit/readwritesplit.c
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@ -1373,8 +1373,19 @@ static route_target_t get_route_target (
* backends but since this is SELECT that is not possible:
* 1. response set is not handled correctly in clientReply and
* 2. multiple results can degrade performance.
*
* Prepared statements are an exception to this since they do not
* actually do anything but only prepare the statement to be used.
* They can be safely routed to all backends since the execution
* is done later.
*
* With prepared statement caching the task of routing
* the execution of the prepared statements to the right server would be
* an easy one. Currently this is not supported.
*/
if (QUERY_IS_TYPE(qtype, QUERY_TYPE_READ))
if (QUERY_IS_TYPE(qtype, QUERY_TYPE_READ) &&
!( QUERY_IS_TYPE(qtype, QUERY_TYPE_PREPARE_STMT) ||
QUERY_IS_TYPE(qtype, QUERY_TYPE_PREPARE_NAMED_STMT)))
{
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,