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MXS-852: Add PS manager class

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The class manages both text and binary protocol prepared statement ID to
type mapping. The text protocol statements are mapped by their plaintext
name and the binary protocol statements are mapped by the session command
ID of the prepared statement.

By mapping the binary protocol prepared statement type to the session
command identifier, we can store the types for both styles of prepared
statements in a very similar manner. When the prepared statement handle is
received from the backend and is sent to the client, the client handle to
session command ID mapping can be done. This allows the mapping of both
client and backend PS handles to internal session command IDs.
This commit is contained in:
Markus Mäkelä
2017-06-21 14:02:38 +03:00
parent 3eac28248d
commit 0aa0fa82b7
5 changed files with 174 additions and 45 deletions
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11
server/modules/routing/readwritesplit/rwsplit_mysql.cc
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@ -207,15 +207,6 @@ bool handle_target_is_all(route_target_t route_target, ROUTER_INSTANCE *inst,
{
bool result = false;
if (qc_query_is_type(qtype, QUERY_TYPE_PREPARE_NAMED_STMT))
{
store_text_ps(rses, extract_text_ps_id(querybuf), querybuf);
}
else if (qc_query_is_type(qtype, QUERY_TYPE_PREPARE_STMT))
{
gwbuf_set_type(querybuf, GWBUF_TYPE_COLLECT_RESULT);
}
if (TARGET_IS_MASTER(route_target) || TARGET_IS_SLAVE(route_target))
{
/**
@ -243,7 +234,7 @@ bool handle_target_is_all(route_target_t route_target, ROUTER_INSTANCE *inst,
MXS_FREE(query_str);
MXS_FREE(qtype_str);
}
else if (route_session_write(rses, gwbuf_clone(querybuf), packet_type))
else if (route_session_write(rses, gwbuf_clone(querybuf), packet_type, qtype))
{
result = true;