diff --git a/Makefile b/Makefile
index 4f8b17a7..7ea2bd25 100644
--- a/Makefile
+++ b/Makefile
@@ -61,7 +61,6 @@ LUA_CLIB_SKYNET = \
   lua-crypt.c lsha1.c \
   lua-sharedata.c \
   lua-stm.c \
-  lua-mysqlaux.c \
   lua-debugchannel.c \
   lua-datasheet.c \
   \
diff --git a/lualib-src/lua-mysqlaux.c b/lualib-src/lua-mysqlaux.c
deleted file mode 100644
index 46fbc67d..00000000
--- a/lualib-src/lua-mysqlaux.c
+++ /dev/null
@@ -1,166 +0,0 @@
-#define LUA_LIB
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <lua.h>
-#include <lauxlib.h>
-
-static unsigned int num_escape_sql_str(unsigned char *dst, unsigned char *src, size_t size)
-{
-    unsigned int n =0;
-    while (size) {
-        /* the highest bit of all the UTF-8 chars
-         * is always 1 */
-        if ((*src & 0x80) == 0) {
-            switch (*src) {
-                case '\0':
-                case '\b':
-                case '\n':
-                case '\r':
-                case '\t':
-                case 26:  /* \Z */
-                case '\\':
-                case '\'':
-                case '"':
-                    n++;
-                    break;
-                default:
-                    break;
-            }
-        }
-        src++;
-        size--;
-    }
-    return n;
-}
-static unsigned char*
-escape_sql_str(unsigned char *dst, unsigned char *src, size_t size)
-{
-    
-      while (size) {
-        if ((*src & 0x80) == 0) {
-            switch (*src) {
-                case '\0':
-                    *dst++ = '\\';
-                    *dst++ = '0';
-                    break;
-                    
-                case '\b':
-                    *dst++ = '\\';
-                    *dst++ = 'b';
-                    break;
-                    
-                case '\n':
-                    *dst++ = '\\';
-                    *dst++ = 'n';
-                    break;
-                    
-                case '\r':
-                    *dst++ = '\\';
-                    *dst++ = 'r';
-                    break;
-                    
-                case '\t':
-                    *dst++ = '\\';
-                    *dst++ = 't';
-                    break;
-                    
-                case 26:
-                    *dst++ = '\\';
-                    *dst++ = 'Z';
-                    break;
-                    
-                case '\\':
-                    *dst++ = '\\';
-                    *dst++ = '\\';
-                    break;
-                    
-                case '\'':
-                    *dst++ = '\\';
-                    *dst++ = '\'';
-                    break;
-                    
-                case '"':
-                    *dst++ = '\\';
-                    *dst++ = '"';
-                    break;
-                    
-                default:
-                    *dst++ = *src;
-                    break;
-            }
-        } else {
-            *dst++ = *src;
-        }
-        src++;
-        size--;
-    } /* while (size) */
-    
-    return  dst;
-}
-
-
-
-
-static int
-quote_sql_str(lua_State *L)
-{
-    size_t                   len, dlen, escape;
-    unsigned char                  *p;
-    unsigned char                  *src, *dst;
-    
-    if (lua_gettop(L) != 1) {
-        return luaL_error(L, "expecting one argument");
-    }
-    
-    src = (unsigned char *) luaL_checklstring(L, 1, &len);
-    
-    if (len == 0) {
-        dst = (unsigned char *) "''";
-        dlen = sizeof("''") - 1;
-        lua_pushlstring(L, (char *) dst, dlen);
-        return 1;
-    }
-    
-    escape = num_escape_sql_str(NULL, src, len);
-    
-    dlen = sizeof("''") - 1 + len + escape;
-    p = lua_newuserdata(L, dlen);
-    
-    dst = p;
-    
-    *p++ = '\'';
-    
-    if (escape == 0) {
-        memcpy(p, src, len);
-        p+=len;
-    } else {
-        p = (unsigned char *) escape_sql_str(p, src, len);
-    }
-    
-    *p++ = '\'';
-    
-    if (p != dst + dlen) {
-        return luaL_error(L, "quote sql string error");
-    }
-    
-    lua_pushlstring(L, (char *) dst, p - dst);
-    
-    return 1;
-}
-
-
-static struct luaL_Reg mysqlauxlib[] = {
-    {"quote_sql_str",quote_sql_str},
-    {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_skynet_mysqlaux_c (lua_State *L) {
-    lua_newtable(L);
-    luaL_setfuncs(L, mysqlauxlib, 0);
-    return 1;
-}
-
diff --git a/lualib/skynet/db/mysql.lua b/lualib/skynet/db/mysql.lua
index 4c3c2a45..022c7f9b 100644
--- a/lualib/skynet/db/mysql.lua
+++ b/lualib/skynet/db/mysql.lua
@@ -5,7 +5,6 @@
 -- Modified by Cloud Wu (remove bit32 for lua 5.3)
 
 local socketchannel = require "skynet.socketchannel"
-local mysqlaux = require "skynet.mysqlaux.c"
 local crypt = require "skynet.crypt"
 
 
@@ -637,9 +636,20 @@ function _M.server_ver(self)
     return self._server_ver
 end
 
+local escape_map = {
+	['\0'] = "\\0",
+	['\b'] = "\\b",
+	['\n'] = "\\n",
+	['\r'] = "\\r",
+	['\t'] = "\\t",
+	['\26'] = "\\Z",
+	['\\'] = "\\\\",
+	["'"] = "\\'",
+	['"'] = '\\"',
+}
 
 function _M.quote_sql_str( str)
-    return mysqlaux.quote_sql_str(str)
+	return strformat("'%s'", strgsub(str, "[\0\b\n\r\t\26\\\'\"]", escape_map))
 end
 
 function _M.set_compact_arrays(self, value)