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Use custom result set detection functions

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The functions that the readwritesplit uses can assume that the buffer
contains only one packet in contiguous memory.
This commit is contained in:
Markus Mäkelä
2017-10-05 17:03:36 +03:00
parent e474b78d95
commit 9ece996466
1 changed files with 25 additions and 3 deletions
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28
server/modules/routing/readwritesplit/readwritesplit.cc
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@ -522,11 +522,33 @@ static bool is_large(GWBUF* buffer)
static bool more_results_exist(GWBUF* buffer)
{
ss_dassert(is_eof(buffer));
ss_dassert(is_eof(buffer) || mxs_mysql_is_ok_packet(buffer));
uint16_t status = gw_mysql_get_byte2(GWBUF_DATA(buffer) + MYSQL_HEADER_LEN + 1 + 2);
return status & SERVER_MORE_RESULTS_EXIST;
}
static bool is_result_set(GWBUF *buffer)
{
bool rval = false;
switch (GWBUF_DATA(buffer)[MYSQL_HEADER_LEN])
{
case MYSQL_REPLY_OK:
case MYSQL_REPLY_ERR:
case MYSQL_REPLY_LOCAL_INFILE:
case MYSQL_REPLY_EOF:
/** Not a result set */
break;
default:
rval = true;
break;
}
return rval;
}
/**
* @brief Check if we have received a complete reply from the backend
*
@ -539,9 +561,9 @@ bool reply_is_complete(SRWBackend backend, GWBUF *buffer)
{
mxs_mysql_cmd_t cmd = mxs_mysql_current_command(backend->dcb()->session);
if (backend->get_reply_state() == REPLY_STATE_START && !mxs_mysql_is_result_set(buffer))
if (backend->get_reply_state() == REPLY_STATE_START && !is_result_set(buffer))
{
if (cmd == MXS_COM_STMT_PREPARE || !mxs_mysql_more_results_after_ok(buffer))
if (cmd == MXS_COM_STMT_PREPARE || !more_results_exist(buffer))
{
/** Not a result set, we have the complete response */
LOG_RS(backend, REPLY_STATE_DONE);