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Remove any trailing spaces and semicolons from the SET statement #4385

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Nov 28, 2023
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2 changes: 2 additions & 0 deletions lib/MySQL_Session.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -6032,6 +6032,8 @@ bool MySQL_Session::handler___status_WAITING_CLIENT_DATA___STATE_SLEEP___MYSQL_C
string nq=string((char *)CurrentQuery.QueryPointer,CurrentQuery.QueryLength);
RE2::GlobalReplace(&nq,(char *)"^/\\*!\\d\\d\\d\\d\\d SET(.*)\\*/",(char *)"SET\\1");
RE2::GlobalReplace(&nq,(char *)"(?U)/\\*.*\\*/",(char *)"");
// remove trailing space and semicolon if present. See issue#4380
nq.erase(nq.find_last_not_of(" ;") + 1);
/*
// we do not threat SET SQL_LOG_BIN as a special case
if (match_regexes && match_regexes[0]->match(dig)) {
Expand Down
24 changes: 24 additions & 0 deletions test/tap/tests/set_testing-240-t.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -82,6 +82,29 @@ class var_counter {
}
};

// Generate string containing randomly chosen characters between
// ';' and ' ', with length between 1 and 8
std::string generate_random_noise() {
// Seed the random number generator with the current time
std::srand(static_cast<unsigned int>(std::time(nullptr)));

static const char characters[] = { ';', ' ' };
static const int numCharacters = sizeof(characters) / sizeof(char);

// max lengh of string is 8
const int length = std::rand() % 8 + 1;

std::string randomString;
randomString.reserve(length);

for (int i = 0; i < length; ++i) {
char randomChar = characters[std::rand() % numCharacters];
randomString.push_back(randomChar);
}

return randomString;
}

//std::unordered_map<std::string,int> unknown_var_counters;

std::unordered_map<std::string,var_counter> vars_counters;
Expand Down Expand Up @@ -160,6 +183,7 @@ void * my_conn_thread(void *arg) {
diag("Thread_id: %lu, random number: %d . Query/ies: %s", mysql->thread_id, r2, testCases[r2].command.c_str());
std::vector<std::string> commands = split(testCases[r2].command.c_str(), ';');
for (auto c : commands) {
c += generate_random_noise();
if (mysql_query(mysql, c.c_str())) {
if (silent==0) {
fprintf(stderr,"ERROR while running -- \"%s\" : (%d) %s\n", c.c_str(), mysql_errno(mysql), mysql_error(mysql));
Expand Down
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