diff --git a/src/share/gen_errno.pl b/src/share/gen_errno.pl
new file mode 100755
index 000000000..50e14aa3b
--- /dev/null
+++ b/src/share/gen_errno.pl
@@ -0,0 +1,418 @@
+#!/usr/bin/env perl
+# Copyright (c) 2021 OceanBase
+# OceanBase CE is licensed under Mulan PubL v2.
+# You can use this software according to the terms and conditions of the Mulan PubL v2.
+# You may obtain a copy of Mulan PubL v2 at:
+#          http://license.coscl.org.cn/MulanPubL-2.0
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+# See the Mulan PubL v2 for more details.
+
+use strict;
+use warnings;
+open my $fh, '<', "ob_errno.def";
+my %map;
+my %other_map;
+my $last_errno = 0;
+my $error_count=0;
+my $def_ora_errno=600;
+my $def_ora_errmsg="\"internal error code, arguments: %d, %s\"";
+my $print_def_ora_errmsg="\"%s-%05d: internal error code, arguments: %d, %s\"";
+my $print_ora_errmsg="\"%s-%05d: %s\"";
+while(<$fh>) {
+  my $error_msg;
+  my $sqlstate;
+  my $error_code;
+
+  if (/^DEFINE_ERROR\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5\n";
+    my $tmp_ora_errmsg=sprintf($print_def_ora_errmsg, "ORA", $def_ora_errno, $2, substr($5, 1, length($5) - 2));
+    $map{$1} = [$2, $3, $4, $5, $5, "$1", $def_ora_errno, $tmp_ora_errmsg, $tmp_ora_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_ERROR_EXT\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6\n";
+    my $tmp_ora_errmsg=sprintf($print_def_ora_errmsg, "ORA", $def_ora_errno, $2, substr($5, 1, length($5) - 2));
+    my $tmp_ora_user_errmsg=sprintf($print_def_ora_errmsg, "ORA", $def_ora_errno, $2, substr($6, 1, length($6) - 2));
+    $map{$1} = [$2, $3, $4, $5, $6, "$1", $def_ora_errno, $tmp_ora_errmsg, $tmp_ora_user_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_ORACLE_ERROR\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")\s*,\s*([^,]*),\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6, $7\n";
+    #print "\"$1\", $6, $7\n";
+    my $tmp_ora_errmsg=sprintf($print_ora_errmsg, "ORA", $6, substr($7, 1, length($7) - 2));
+    $map{$1} = [$2, $3, $4, $5, $5, "$1", $6, $tmp_ora_errmsg, $tmp_ora_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_ORACLE_ERROR_EXT\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")\s*,\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6, $7, $8, $9\n";
+    #print "\"$1\", $7, $8, $9\n";
+    my $tmp_ora_errmsg=sprintf($print_ora_errmsg, "ORA", $7, substr($8, 1, length($8) - 2));
+    my $tmp_ora_user_errmsg=sprintf($print_ora_errmsg, "ORA", $7, substr($9, 1, length($9) - 2));
+    $map{$1} = [$2, $3, $4, $5, $6, "$1", $7, $tmp_ora_errmsg, $tmp_ora_user_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_OTHER_MSG_FMT\(([^,]+),\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")/) {
+    #print "\"$1\", $1, $2, $3, $4\n";
+    $other_map{$1} = [$2, $3, $4];
+  } elsif (/^DEFINE_PLS_ERROR\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")\s*,\s*([^,]*),\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6, $7\n";
+    #print "\"$1\", $6, $7\n";
+    my $tmp_ora_errmsg=sprintf($print_ora_errmsg, "PLS", $6, substr($7, 1, length($7) - 2));
+    $map{$1} = [$2, $3, $4, $5, $5, "$1", $6, $tmp_ora_errmsg, $tmp_ora_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_PLS_ERROR_EXT\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")\s*,\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6, $7, $8, $9\n";
+    #print "\"$1\", $7, $8, $9\n";
+    my $tmp_ora_errmsg=sprintf($print_ora_errmsg, "PLS", $7, substr($8, 1, length($8) - 2));
+    my $tmp_ora_user_errmsg=sprintf($print_ora_errmsg, "PLS", $7, substr($9, 1, length($9) - 2));
+    $map{$1} = [$2, $3, $4, $5, $6, "$1", $7, $tmp_ora_errmsg, $tmp_ora_user_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  } elsif (/^DEFINE_ORACLE_ERROR_V2_EXT\(([^,]+),\s*([^,]*),\s*([^,]*),\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")\s*,\s*([^,]*),\s*("[^"]*")\s*,\s*("[^"]*")/) {
+    ++$error_count;
+    #print "\"$1\", $1, $2, $3, $4, $5, $6, $7, $8, $9\n";
+    #print "\"$1\", $7, $8, $9\n";
+    my $tmp_ora_errmsg=sprintf("\"%s\"", substr($8, 1, length($8) - 2));
+    my $tmp_ora_user_errmsg=sprintf("\"%s\"", substr($9, 1, length($9) - 2));
+    $map{$1} = [$2, $3, $4, $5, $6, "$1", $7, $tmp_ora_errmsg, $tmp_ora_user_errmsg];
+    $last_errno = $2 if ($2 < $last_errno);
+    $error_code = $2;
+    $sqlstate = $4;
+    $error_msg = $5;
+  }
+  if (defined $error_code) {
+    print "WARN: undefined SQLSTATE for $1\n" if ($sqlstate eq "\"\"");
+    print "WARN: undefined error message for $1\n" if ($error_msg eq "\"\"");
+    print "WARN: error code out of range: $1\n" if ($error_code <= -1 && $error_code > -3000);
+  }
+}
+
+print "total error code: $error_count\n";
+print "please wait for writing files ...\n";
+# check duplicate error number
+my %dedup;
+for my $oberr (keys % map) {
+  my $errno = $map{$oberr}->[0];
+  if (defined $dedup{$errno})
+  {
+    print "Error: error code($errno) is duplicated for $oberr and $dedup{$errno}\n";
+    exit 1;
+  } else {
+    $dedup{$errno} = $oberr;
+  }
+}
+
+# sort
+my @pairs = map {[$_, $map{$_}->[0] ]} keys %map;
+my @sorted = sort {$b->[1] <=> $a->[1]} @pairs;
+my @errors = map {$_->[0]} @sorted;
+
+# generate ob_errno.h
+open my $fh_header, '>', "ob_errno.h";
+print $fh_header '/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+// DO NOT EDIT. This file is automatically generated from `ob_errno.def\'.
+
+#ifndef OCEANBASE_LIB_OB_ERRNO_H_
+#define OCEANBASE_LIB_OB_ERRNO_H_
+#include <stdint.h>
+#include "share/mysql_errno.h"
+#include "lib/ob_errno.h"
+
+namespace oceanbase
+{
+namespace common
+{
+using namespace ::oblib;
+';
+  print $fh_header "
+constexpr int OB_LAST_ERROR_CODE = $last_errno;
+constexpr int OB_ERR_SQL_START = -5000;
+constexpr int OB_ERR_SQL_END = -5999;
+";
+  for my $oberr (@errors) {
+    if (system "grep $oberr ../../deps/oblib/src/lib/ob_errno.h >/dev/null") {
+      print $fh_header "constexpr int $oberr = $map{$oberr}->[0];\n";
+    }
+  }
+  foreach my $oberr (keys %other_map){
+    if (system "grep $oberr ../../deps/oblib/src/lib/ob_errno.h >/dev/null") {
+      my $errno;
+      if (exists($map{$other_map{$oberr}->[0]})){
+        $errno = $map{$other_map{$oberr}->[0]}->[0];
+      } else {
+        print "Error: error code($other_map{$oberr}->[0]) is not exists\n";
+        exit 1;
+      }
+      print $fh_header "constexpr int $oberr = $errno;\n";
+    }
+  }
+  print $fh_header "\n\n";
+  for my $oberr (@errors) {
+    print $fh_header "#define ${oberr}__USER_ERROR_MSG $map{$oberr}->[4]\n";
+  }
+  foreach my $oberr (keys %other_map){
+    print $fh_header "#define ${oberr}__USER_ERROR_MSG $other_map{$oberr}->[1]\n";
+  }
+  print $fh_header "\n\n";
+  for my $oberr (@errors) {
+    print $fh_header "#define ${oberr}__ORA_USER_ERROR_MSG $map{$oberr}->[8]\n";
+  }
+  foreach my $oberr (keys %other_map){
+    my $ora_errno;
+    if (exists($map{$other_map{$oberr}->[0]})){
+      $ora_errno = $map{$other_map{$oberr}->[0]}->[6];
+    } else {
+      print "Error: error code($other_map{$oberr}->[0]) is not exists\n";
+      exit 1;
+    }
+    my $ora_msg=$other_map{$oberr}->[2];
+    my $tmp_ora_user_errmsg=sprintf($print_ora_errmsg, "ORA", $ora_errno, substr($ora_msg, 1, length($ora_msg) - 2));
+    print $fh_header "#define ${oberr}__ORA_USER_ERROR_MSG $tmp_ora_user_errmsg\n";
+  }
+  print $fh_header '
+
+  const char *ob_error_name(const int oberr);
+  int ob_mysql_errno(const int oberr);
+  int ob_mysql_errno_with_check(const int oberr);
+  const char *ob_sqlstate(const int oberr);
+  const char *ob_strerror(const int oberr);
+  const char *ob_str_user_error(const int oberr);
+
+  int ob_oracle_errno(const int oberr);
+  int ob_oracle_errno_with_check(const int oberr);
+  const char *ob_oracle_strerror(const int oberr);
+  const char *ob_oracle_str_user_error(const int oberr);
+
+  int ob_errpkt_errno(const int oberr, const bool is_oracle_mode);
+  const char *ob_errpkt_strerror(const int oberr, const bool is_oracle_mode);
+  const char *ob_errpkt_str_user_error(const int oberr, const bool is_oracle_mode);
+
+
+} // end namespace common
+} // end namespace oceanbase
+
+#endif //OCEANBASE_LIB_OB_ERRNO_H_
+';
+
+# generate ob_errno.cpp
+open my $fh_cpp, '>', "ob_errno.cpp";
+print $fh_cpp '/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+// DO NOT EDIT. This file is automatically generated from `ob_errno.def\'.
+
+#include "ob_errno.h"
+#include "ob_define.h"
+using namespace oceanbase::common;
+
+static const char *ERROR_NAME[OB_MAX_ERROR_CODE];
+static int MYSQL_ERRNO[OB_MAX_ERROR_CODE];
+static const char *SQLSTATE[OB_MAX_ERROR_CODE];
+static const char *STR_ERROR[OB_MAX_ERROR_CODE];
+static const char *STR_USER_ERROR[OB_MAX_ERROR_CODE];
+
+static int ORACLE_ERRNO[OB_MAX_ERROR_CODE];
+static const char *ORACLE_STR_ERROR[OB_MAX_ERROR_CODE];
+static const char *ORACLE_STR_USER_ERROR[OB_MAX_ERROR_CODE];
+
+static struct ObStrErrorInit
+{
+  ObStrErrorInit()
+  {
+    memset(ERROR_NAME, 0, sizeof(ERROR_NAME));
+    memset(MYSQL_ERRNO, 0, sizeof(MYSQL_ERRNO));
+    memset(SQLSTATE, 0, sizeof(SQLSTATE));
+    memset(STR_ERROR, 0, sizeof(STR_ERROR));
+    memset(STR_USER_ERROR, 0, sizeof(STR_USER_ERROR));
+
+    memset(ORACLE_ERRNO, 0, sizeof(ORACLE_ERRNO));
+    memset(ORACLE_STR_ERROR, 0, sizeof(ORACLE_STR_ERROR));
+    memset(ORACLE_STR_USER_ERROR, 0, sizeof(ORACLE_STR_USER_ERROR));
+
+';
+    for my $oberr (@errors) {
+      if (0 > $map{$oberr}->[0]) {
+        print $fh_cpp "    ERROR_NAME[-$oberr] = \"$map{$oberr}->[5]\";\n";
+        print $fh_cpp "    MYSQL_ERRNO[-$oberr] = $map{$oberr}->[1];\n";
+        print $fh_cpp "    SQLSTATE[-$oberr] = $map{$oberr}->[2];\n";
+        print $fh_cpp "    STR_ERROR[-$oberr] = $map{$oberr}->[3];\n";
+        print $fh_cpp "    STR_USER_ERROR[-$oberr] = $map{$oberr}->[4];\n";
+        print $fh_cpp "    ORACLE_ERRNO[-$oberr] = $map{$oberr}->[6];\n";
+        print $fh_cpp "    ORACLE_STR_ERROR[-$oberr] = $map{$oberr}->[7];\n";
+        print $fh_cpp "    ORACLE_STR_USER_ERROR[-$oberr] = $map{$oberr}->[8];\n";
+      }
+    }
+
+  print $fh_cpp '
+  }
+} local_init;
+
+namespace oceanbase
+{
+namespace common
+{
+  const char *ob_error_name(const int err)
+  {
+    const char *ret = "Unknown error";
+    if (OB_UNLIKELY(0 == err)) {
+      ret = "OB_SUCCESS";
+    } else if (OB_LIKELY(0 > err && err > -OB_MAX_ERROR_CODE)) {
+      ret = ERROR_NAME[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0]))
+      {
+        ret = "Unknown Error";
+      }
+    }
+    return ret;
+  }
+
+  const char *ob_strerror(const int err)
+  {
+    const char *ret = "Unknown error";
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = STR_ERROR[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0]))
+      {
+        ret = "Unknown Error";
+      }
+    }
+    return ret;
+  }
+  const char *ob_str_user_error(const int err)
+  {
+    const char *ret = NULL;
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = STR_USER_ERROR[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0])) {
+        ret = NULL;
+      }
+    }
+    return ret;
+  }
+  const char *ob_sqlstate(const int err)
+  {
+    const char *ret = "HY000";
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = SQLSTATE[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0])) {
+        ret = "HY000";
+      }
+    }
+    return ret;
+  }
+  int ob_mysql_errno(const int err)
+  {
+    int ret = -1;
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = MYSQL_ERRNO[-err];
+    }
+    return ret;
+  }
+  int ob_mysql_errno_with_check(const int err)
+  {
+    int ret = ob_mysql_errno(err);
+    if (ret < 0) {
+      ret = -err;
+    }
+    return ret;
+  }
+  const char *ob_oracle_strerror(const int err)
+  {
+    const char *ret = "Unknown error";
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = ORACLE_STR_ERROR[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0]))
+      {
+        ret = "Unknown Error";
+      }
+    }
+    return ret;
+  }
+  const char *ob_oracle_str_user_error(const int err)
+  {
+    const char *ret = NULL;
+    if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = ORACLE_STR_USER_ERROR[-err];
+      if (OB_UNLIKELY(NULL == ret || \'\0\' == ret[0])) {
+        ret = NULL;
+      }
+    }
+    return ret;
+  }
+  int ob_oracle_errno(const int err)
+  {
+    int ret = -1;
+    if (OB_ERR_PROXY_REROUTE == err) {
+      // Oracle Mode and MySQL mode should return same errcode for reroute sql
+      // thus we make the specialization here
+      ret = -1;
+    } else if (err >= OB_MIN_RAISE_APPLICATION_ERROR && err <= OB_MAX_RAISE_APPLICATION_ERROR) {
+      ret = err; // PL/SQL Raise Application Error
+    } else if (OB_LIKELY(0 >= err && err > -OB_MAX_ERROR_CODE)) {
+      ret = ORACLE_ERRNO[-err];
+    }
+    return ret;
+  }
+  int ob_oracle_errno_with_check(const int err)
+  {
+    int ret = ob_oracle_errno(err);
+    if (ret < 0) {
+      ret = -err;
+    }
+    return ret;
+  }
+  int ob_errpkt_errno(const int err, const bool is_oracle_mode)
+  {
+    return (is_oracle_mode ? ob_oracle_errno_with_check(err) : ob_mysql_errno_with_check(err));
+  }
+  const char *ob_errpkt_strerror(const int err, const bool is_oracle_mode)
+  {
+    return (is_oracle_mode ? ob_oracle_strerror(err) : ob_strerror(err));
+  }
+  const char *ob_errpkt_str_user_error(const int err, const bool is_oracle_mode)
+  {
+    return (is_oracle_mode ? ob_oracle_str_user_error(err) : ob_str_user_error(err));
+  }
+
+} // end namespace common
+} // end namespace oceanbase
+  ';