Added full DateStyle default value

include/proxysql_structs.h

@@ -1760,7 +1760,7 @@ mysql_variable_st mysql_tracked_variables[] {
 
 pgsql_variable_st pgsql_tracked_variables[] {
 	{ PGSQL_CLIENT_ENCODING,       SETTING_CHARSET,	    "client_encoding", "client_encoding", "UTF8", (PGTRACKED_VAR_OPT_SET_TRANSACTION | PGTRACKED_VAR_OPT_QUOTE | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), { "names", nullptr } },
-	{ PGSQL_DATESTYLE,			   SETTING_VARIABLE,	"datestyle", "datestyle", "ISO" , (PGTRACKED_VAR_OPT_QUOTE | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), nullptr },
+	{ PGSQL_DATESTYLE,			   SETTING_VARIABLE,	"datestyle", "datestyle", "ISO, MDY" , (PGTRACKED_VAR_OPT_QUOTE | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), nullptr },
 	{ PGSQL_INTERVALSTYLE,		   SETTING_VARIABLE,	"intervalstyle", "intervalstyle", "postgres" , (PGTRACKED_VAR_OPT_QUOTE | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), nullptr },
 	{ PGSQL_STANDARD_CONFORMING_STRINGS, SETTING_VARIABLE, "standard_conforming_strings", "standard_conforming_strings", "on", (PGTRACKED_VAR_OPT_BOOL | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), nullptr },
 	{ PGSQL_TIMEZONE,			   SETTING_VARIABLE,	"timezone", "timezone", "GMT" , (PGTRACKED_VAR_OPT_QUOTE | PGTRACKED_VAR_OPT_GLOBAL_VARIABLE | PGTRACKED_VAR_OPT_PARAM_STATUS), { "TIME ZONE", nullptr } },