Fixed parsing of SET with double quote

lib/set_parser.cpp

@@ -29,7 +29,7 @@ std::map<std::string,std::vector<string>> SetParser::parse() {
   std::map<std::string,std::vector<string>> result;
 
 #define NAMES "(NAMES)"
-#define QUOTES "(?:'||\")"
+#define QUOTES "(?:'|\")?"
 #define NAME_VALUE "((?:\\w|\\d)+)"
 #define SESSION "(?:|SESSION +|@@|@@session.)"
 #define VAR "(\\w+)"

test/set_parser_test/Makefile

@@ -39,7 +39,7 @@ LIBPROXYSQLAR=$(LDIR)/libproxysql.a
 
 MYCPPFLAGS=-std=c++11 $(IDIRS) $(OPTZ) $(DEBUG) -ggdb
 LDFLAGS+=
-MYLIBS=-Wl,--export-dynamic -Wl,-Bstatic -lconfig -lproxysql -ldaemon -ljemalloc -lconfig++ -lre2 -levent -lmariadbclient -Wl,-Bdynamic -lpthread -lm -lz -lrt -lcrypto -lssl $(EXTRALINK)
+MYLIBS=-Wl,--export-dynamic -Wl,-Bstatic -lproxysql -ldaemon -ljemalloc -lre2 -lmariadbclient -Wl,-Bdynamic -lpthread -lm -lz -lrt -lcrypto -lssl $(EXTRALINK)
 
 ifeq ($(UNAME_S),Darwin)
 	MYLIBS=-lre2 -lpthread -lm -lz -liconv

test/set_parser_test/setparsertest.cpp

@@ -80,6 +80,7 @@ static Test sql_mode[] = {
   { "SET sql_mode = 'TRADITIONAL'", { Expected("sql_mode",  {"TRADITIONAL"}) } },
   { "SET SQL_MODE   ='TRADITIONAL'", { Expected("sql_mode",  {"TRADITIONAL"}) } },
   { "SET SQL_MODE  = \"TRADITIONAL\"", { Expected("sql_mode",  {"TRADITIONAL"}) } },
+  { "SET SQL_MODE  = TRADITIONAL", { Expected("sql_mode",  {"TRADITIONAL"}) } },
 };
 
 void TestParse(const Test* tests, int ntests, const string& title) {
@@ -107,6 +108,9 @@ TEST(TestParse, SET_SQL_MODE) {
 
 static Test time_zone[] = {
   { "SET @@time_zone = 'Europe/Paris'", { Expected("time_zone",  {"Europe/Paris"}) } },
+  { "SET @@time_zone = '+00:00'", { Expected("time_zone",  {"+00:00"}) } },
+  { "SET @@time_zone = \"Europe/Paris\"", { Expected("time_zone",  {"Europe/Paris"}) } },
+  { "SET @@time_zone = \"+00:00\"", { Expected("time_zone",  {"+00:00"}) } },
 };
 
 TEST(TestParse, SET_TIME_ZONE) {