diff --git a/executor/admin_test.go b/executor/admin_test.go
index 568b37bc6484a..ba4e9606b901b 100644
--- a/executor/admin_test.go
+++ b/executor/admin_test.go
@@ -433,7 +433,7 @@ func (s *testSuite2) TestAdminCheckPartitionTableFailed(c *C) {
 		err = txn.Commit(context.Background())
 		c.Assert(err, IsNil)
 		err = tk.ExecToErr("admin check table admin_test_p")
-		c.Assert(err.Error(), Equals, fmt.Sprintf("[executor:8003]admin_test_p err:[admin:1]index:<nil> != record:&admin.RecordData{Handle:%d, Values:[]types.Datum{types.Datum{k:0x1, collation:0x0, decimal:0x0, length:0x0, i:%d, b:[]uint8(nil), x:interface {}(nil)}}}", i, i))
+		c.Assert(err.Error(), Equals, fmt.Sprintf("[executor:8003]admin_test_p err:[admin:8223]index:<nil> != record:&admin.RecordData{Handle:%d, Values:[]types.Datum{types.Datum{k:0x1, collation:0x0, decimal:0x0, length:0x0, i:%d, b:[]uint8(nil), x:interface {}(nil)}}}", i, i))
 		c.Assert(executor.ErrAdminCheckTable.Equal(err), IsTrue)
 		// TODO: fix admin recover for partition table.
 		//r := tk.MustQuery("admin recover index admin_test_p idx")
@@ -527,7 +527,7 @@ func (s *testSuite5) TestAdminCheckTableFailed(c *C) {
 	c.Assert(err, IsNil)
 	err = tk.ExecToErr("admin check table admin_test")
 	c.Assert(err.Error(), Equals,
-		"[executor:8003]admin_test err:[admin:1]index:<nil> != record:&admin.RecordData{Handle:-1, Values:[]types.Datum{types.Datum{k:0x1, collation:0x0, decimal:0x0, length:0x0, i:-10, b:[]uint8(nil), x:interface {}(nil)}}}")
+		"[executor:8003]admin_test err:[admin:8223]index:<nil> != record:&admin.RecordData{Handle:-1, Values:[]types.Datum{types.Datum{k:0x1, collation:0x0, decimal:0x0, length:0x0, i:-10, b:[]uint8(nil), x:interface {}(nil)}}}")
 	c.Assert(executor.ErrAdminCheckTable.Equal(err), IsTrue)
 	r := tk.MustQuery("admin recover index admin_test c2")
 	r.Check(testkit.Rows("1 7"))
diff --git a/go.mod b/go.mod
index f0de1a8ba6e9f..d299d4e4d6e07 100644
--- a/go.mod
+++ b/go.mod
@@ -37,7 +37,7 @@ require (
 	github.com/pingcap/goleveldb v0.0.0-20171020122428-b9ff6c35079e
 	github.com/pingcap/kvproto v0.0.0-20191202044712-32be31591b03
 	github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9
-	github.com/pingcap/parser v0.0.0-20191210060830-bdf23a7ade01
+	github.com/pingcap/parser v0.0.0-20191216031109-53ef01243aa6
 	github.com/pingcap/pd v1.1.0-beta.0.20191210055626-676ddd3fbd2d
 	github.com/pingcap/sysutil v0.0.0-20191126040022-986c5b3ed9a3
 	github.com/pingcap/tidb-tools v3.0.6-0.20191106033616-90632dda3863+incompatible
diff --git a/go.sum b/go.sum
index 7b7a8df8cdcdf..6b74cbcb8d722 100644
--- a/go.sum
+++ b/go.sum
@@ -190,8 +190,8 @@ github.com/pingcap/kvproto v0.0.0-20191202044712-32be31591b03/go.mod h1:WWLmULLO
 github.com/pingcap/log v0.0.0-20190715063458-479153f07ebd/go.mod h1:WpHUKhNZ18v116SvGrmjkA9CBhYmuUTKL+p8JC9ANEw=
 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9 h1:AJD9pZYm72vMgPcQDww9rkZ1DnWfl0pXV3BOWlkYIjA=
 github.com/pingcap/log v0.0.0-20191012051959-b742a5d432e9/go.mod h1:4rbK1p9ILyIfb6hU7OG2CiWSqMXnp3JMbiaVJ6mvoY8=
-github.com/pingcap/parser v0.0.0-20191210060830-bdf23a7ade01 h1:q1rGnV/296//bArDP7cDWWaSrhaeEKZY+gIo+Jb0Gyk=
-github.com/pingcap/parser v0.0.0-20191210060830-bdf23a7ade01/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
+github.com/pingcap/parser v0.0.0-20191216031109-53ef01243aa6 h1:aAhPfDloqGNCYkY0/vpcRGneyum5Sph4+foxA4XzarU=
+github.com/pingcap/parser v0.0.0-20191216031109-53ef01243aa6/go.mod h1:1FNvfp9+J0wvc4kl8eGNh7Rqrxveg15jJoWo/a0uHwA=
 github.com/pingcap/pd v1.1.0-beta.0.20191210055626-676ddd3fbd2d h1:0uUwCayeh1U4r1n7kb4gHf2ZbiI9fuVtXPCEpb2piBY=
 github.com/pingcap/pd v1.1.0-beta.0.20191210055626-676ddd3fbd2d/go.mod h1:Z/VMtXHpkOP+MnYnk4TL5VHc3ZwO1qHwc89zDuf5n8Q=
 github.com/pingcap/sysutil v0.0.0-20191126040022-986c5b3ed9a3 h1:HCNif3lukL83gNC2EBAoh2Qbz36+2p0bm0LjgnNfl1s=
diff --git a/meta/meta_test.go b/meta/meta_test.go
index 8c8c23f0e0b57..61b52e2eee4eb 100644
--- a/meta/meta_test.go
+++ b/meta/meta_test.go
@@ -294,7 +294,7 @@ func (s *testSuite) TestSnapshot(c *C) {
 	c.Assert(n, Equals, int64(1))
 	_, err = snapMeta.GenGlobalID()
 	c.Assert(err, NotNil)
-	c.Assert(err.Error(), Equals, "[structure:5]write on snapshot")
+	c.Assert(err.Error(), Equals, "[structure:8220]write on snapshot")
 }
 
 func (s *testSuite) TestDDL(c *C) {
diff --git a/structure/hash.go b/structure/hash.go
index 8d16b626b7520..9d19a05dbdf58 100644
--- a/structure/hash.go
+++ b/structure/hash.go
@@ -46,7 +46,7 @@ func (meta hashMeta) IsEmpty() bool {
 // HSet sets the string value of a hash field.
 func (t *TxStructure) HSet(key []byte, field []byte, value []byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	return t.updateHash(key, field, func([]byte) ([]byte, error) {
 		return value, nil
@@ -76,7 +76,7 @@ func (t *TxStructure) EncodeHashAutoIDKeyValue(key []byte, field []byte, val int
 // the value after the increment.
 func (t *TxStructure) HInc(key []byte, field []byte, step int64) (int64, error) {
 	if t.readWriter == nil {
-		return 0, errWriteOnSnapshot
+		return 0, ErrWriteOnSnapshot
 	}
 	base := int64(0)
 	err := t.updateHash(key, field, func(oldValue []byte) ([]byte, error) {
@@ -156,7 +156,7 @@ func (t *TxStructure) HLen(key []byte) (int64, error) {
 // HDel deletes one or more hash fields.
 func (t *TxStructure) HDel(key []byte, fields ...[]byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	metaKey := t.encodeHashMetaKey(key)
 	meta, err := t.loadHashMeta(metaKey)
@@ -332,7 +332,7 @@ func (t *TxStructure) loadHashMeta(metaKey []byte) (hashMeta, error) {
 	}
 
 	if len(v) != 8 {
-		return meta, errInvalidListMetaData
+		return meta, ErrInvalidListMetaData
 	}
 
 	meta.FieldCount = int64(binary.BigEndian.Uint64(v[0:8]))
diff --git a/structure/list.go b/structure/list.go
index 079a5d2765a23..c55109a197b56 100644
--- a/structure/list.go
+++ b/structure/list.go
@@ -49,7 +49,7 @@ func (t *TxStructure) RPush(key []byte, values ...[]byte) error {
 
 func (t *TxStructure) listPush(key []byte, left bool, values ...[]byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	if len(values) == 0 {
 		return nil
@@ -92,7 +92,7 @@ func (t *TxStructure) RPop(key []byte) ([]byte, error) {
 
 func (t *TxStructure) listPop(key []byte, left bool) ([]byte, error) {
 	if t.readWriter == nil {
-		return nil, errWriteOnSnapshot
+		return nil, ErrWriteOnSnapshot
 	}
 	metaKey := t.encodeListMetaKey(key)
 	meta, err := t.loadListMeta(metaKey)
@@ -176,7 +176,7 @@ func (t *TxStructure) LIndex(key []byte, index int64) ([]byte, error) {
 // LSet updates an element in the list by its index.
 func (t *TxStructure) LSet(key []byte, index int64, value []byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	metaKey := t.encodeListMetaKey(key)
 	meta, err := t.loadListMeta(metaKey)
@@ -189,13 +189,13 @@ func (t *TxStructure) LSet(key []byte, index int64, value []byte) error {
 	if index >= meta.LIndex && index < meta.RIndex {
 		return t.readWriter.Set(t.encodeListDataKey(key, index), value)
 	}
-	return errInvalidListIndex.GenWithStack("invalid list index %d", index)
+	return ErrInvalidListIndex.GenWithStack("invalid list index %d", index)
 }
 
 // LClear removes the list of the key.
 func (t *TxStructure) LClear(key []byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	metaKey := t.encodeListMetaKey(key)
 	meta, err := t.loadListMeta(metaKey)
@@ -228,7 +228,7 @@ func (t *TxStructure) loadListMeta(metaKey []byte) (listMeta, error) {
 	}
 
 	if len(v) != 16 {
-		return meta, errInvalidListMetaData
+		return meta, ErrInvalidListMetaData
 	}
 
 	meta.LIndex = int64(binary.BigEndian.Uint64(v[0:8]))
diff --git a/structure/string.go b/structure/string.go
index b00082e74ea9f..57a1fa4ec2dfe 100644
--- a/structure/string.go
+++ b/structure/string.go
@@ -24,7 +24,7 @@ import (
 // Set sets the string value of the key.
 func (t *TxStructure) Set(key []byte, value []byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	ek := t.encodeStringDataKey(key)
 	return t.readWriter.Set(ek, value)
@@ -55,7 +55,7 @@ func (t *TxStructure) GetInt64(key []byte) (int64, error) {
 // the value after the increment.
 func (t *TxStructure) Inc(key []byte, step int64) (int64, error) {
 	if t.readWriter == nil {
-		return 0, errWriteOnSnapshot
+		return 0, ErrWriteOnSnapshot
 	}
 	ek := t.encodeStringDataKey(key)
 	// txn Inc will lock this key, so we don't lock it here.
@@ -69,7 +69,7 @@ func (t *TxStructure) Inc(key []byte, step int64) (int64, error) {
 // Clear removes the string value of the key.
 func (t *TxStructure) Clear(key []byte) error {
 	if t.readWriter == nil {
-		return errWriteOnSnapshot
+		return ErrWriteOnSnapshot
 	}
 	ek := t.encodeStringDataKey(key)
 	err := t.readWriter.Delete(ek)
diff --git a/structure/structure.go b/structure/structure.go
index b736ec9daf981..7617e08eb7813 100644
--- a/structure/structure.go
+++ b/structure/structure.go
@@ -14,22 +14,20 @@
 package structure
 
 import (
+	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 )
 
-// structure error codes.
-const (
-	codeInvalidHashKeyFlag  terror.ErrCode = 1
-	codeInvalidListMetaData terror.ErrCode = 4
-	codeWriteOnSnapshot     terror.ErrCode = 5
-)
-
 var (
-	errInvalidHashKeyFlag  = terror.ClassStructure.New(codeInvalidHashKeyFlag, "invalid encoded hash key flag")
-	errInvalidListIndex    = terror.ClassStructure.New(codeInvalidListMetaData, "invalid list index")
-	errInvalidListMetaData = terror.ClassStructure.New(codeInvalidListMetaData, "invalid list meta data")
-	errWriteOnSnapshot     = terror.ClassStructure.New(codeWriteOnSnapshot, "write on snapshot")
+	// ErrInvalidHashKeyFlag used by structure
+	ErrInvalidHashKeyFlag = terror.ClassStructure.New(mysql.ErrInvalidHashKeyFlag, mysql.MySQLErrName[mysql.ErrInvalidHashKeyFlag])
+	// ErrInvalidListIndex used by structure
+	ErrInvalidListIndex = terror.ClassStructure.New(mysql.ErrInvalidListIndex, mysql.MySQLErrName[mysql.ErrInvalidListIndex])
+	// ErrInvalidListMetaData used by structure
+	ErrInvalidListMetaData = terror.ClassStructure.New(mysql.ErrInvalidListMetaData, mysql.MySQLErrName[mysql.ErrInvalidListMetaData])
+	// ErrWriteOnSnapshot used by structure
+	ErrWriteOnSnapshot = terror.ClassStructure.New(mysql.ErrWriteOnSnapshot, mysql.MySQLErrName[mysql.ErrWriteOnSnapshot])
 )
 
 // NewStructure creates a TxStructure with Retriever, RetrieverMutator and key prefix.
@@ -48,3 +46,14 @@ type TxStructure struct {
 	readWriter kv.RetrieverMutator
 	prefix     []byte
 }
+
+func init() {
+	// Register terror to mysql error map.
+	mySQLErrCodes := map[terror.ErrCode]uint16{
+		mysql.ErrInvalidHashKeyFlag:  mysql.ErrInvalidHashKeyFlag,
+		mysql.ErrInvalidListIndex:    mysql.ErrInvalidListIndex,
+		mysql.ErrInvalidListMetaData: mysql.ErrInvalidListMetaData,
+		mysql.ErrWriteOnSnapshot:     mysql.ErrWriteOnSnapshot,
+	}
+	terror.ErrClassToMySQLCodes[terror.ClassStructure] = mySQLErrCodes
+}
diff --git a/structure/structure_test.go b/structure/structure_test.go
index e6e55fcf5dfef..62fdeb8f60159 100644
--- a/structure/structure_test.go
+++ b/structure/structure_test.go
@@ -18,6 +18,8 @@ import (
 	"testing"
 
 	. "github.com/pingcap/check"
+	"github.com/pingcap/parser/mysql"
+	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/store/mockstore"
 	"github.com/pingcap/tidb/structure"
@@ -395,3 +397,16 @@ func (s *testTxStructureSuite) TestHash(c *C) {
 	})
 	c.Assert(err, IsNil)
 }
+
+func (*testTxStructureSuite) TestError(c *C) {
+	kvErrs := []*terror.Error{
+		structure.ErrInvalidHashKeyFlag,
+		structure.ErrInvalidListIndex,
+		structure.ErrInvalidListMetaData,
+		structure.ErrWriteOnSnapshot,
+	}
+	for _, err := range kvErrs {
+		code := err.ToSQLError().Code
+		c.Assert(code != mysql.ErrUnknown && code == uint16(err.Code()), IsTrue, Commentf("err: %v", err))
+	}
+}
diff --git a/structure/type.go b/structure/type.go
index 7096d70e86984..3411aad81703d 100644
--- a/structure/type.go
+++ b/structure/type.go
@@ -91,7 +91,7 @@ func (t *TxStructure) decodeHashDataKey(ek kv.Key) ([]byte, []byte, error) {
 	if err != nil {
 		return nil, nil, errors.Trace(err)
 	} else if TypeFlag(tp) != HashData {
-		return nil, nil, errInvalidHashKeyFlag.GenWithStack("invalid encoded hash data key flag %c", byte(tp))
+		return nil, nil, ErrInvalidHashKeyFlag.GenWithStack("invalid encoded hash data key flag %c", byte(tp))
 	}
 
 	_, field, err = codec.DecodeBytes(ek, nil)
diff --git a/tablecodec/tablecodec.go b/tablecodec/tablecodec.go
index f25f0a88a272b..8e982f6295b9e 100644
--- a/tablecodec/tablecodec.go
+++ b/tablecodec/tablecodec.go
@@ -30,9 +30,9 @@ import (
 )
 
 var (
-	errInvalidKey       = terror.ClassXEval.New(codeInvalidKey, "invalid key")
-	errInvalidRecordKey = terror.ClassXEval.New(codeInvalidRecordKey, "invalid record key")
-	errInvalidIndexKey  = terror.ClassXEval.New(codeInvalidIndexKey, "invalid index key")
+	errInvalidKey       = terror.ClassXEval.New(mysql.ErrInvalidKey, mysql.MySQLErrName[mysql.ErrInvalidKey])
+	errInvalidRecordKey = terror.ClassXEval.New(mysql.ErrInvalidRecordKey, mysql.MySQLErrName[mysql.ErrInvalidRecordKey])
+	errInvalidIndexKey  = terror.ClassXEval.New(mysql.ErrInvalidIndexKey, mysql.MySQLErrName[mysql.ErrInvalidIndexKey])
 )
 
 var (
@@ -721,9 +721,11 @@ func GetTableIndexKeyRange(tableID, indexID int64) (startKey, endKey []byte) {
 	return
 }
 
-const (
-	codeInvalidRecordKey   = 4
-	codeInvalidColumnCount = 5
-	codeInvalidKey         = 6
-	codeInvalidIndexKey    = 7
-)
+func init() {
+	mySQLErrCodes := map[terror.ErrCode]uint16{
+		mysql.ErrInvalidKey:       mysql.ErrInvalidKey,
+		mysql.ErrInvalidRecordKey: mysql.ErrInvalidRecordKey,
+		mysql.ErrInvalidIndexKey:  mysql.ErrInvalidIndexKey,
+	}
+	terror.ErrClassToMySQLCodes[terror.ClassXEval] = mySQLErrCodes
+}
diff --git a/tablecodec/tablecodec_test.go b/tablecodec/tablecodec_test.go
index 94f2a363c8e81..a71b62b161ea4 100644
--- a/tablecodec/tablecodec_test.go
+++ b/tablecodec/tablecodec_test.go
@@ -22,6 +22,7 @@ import (
 	. "github.com/pingcap/check"
 	"github.com/pingcap/failpoint"
 	"github.com/pingcap/parser/mysql"
+	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/sessionctx/stmtctx"
 	"github.com/pingcap/tidb/types"
@@ -519,3 +520,15 @@ func BenchmarkEncodeValue(b *testing.B) {
 		}
 	}
 }
+
+func (s *testTableCodecSuite) TestError(c *C) {
+	kvErrs := []*terror.Error{
+		errInvalidKey,
+		errInvalidRecordKey,
+		errInvalidIndexKey,
+	}
+	for _, err := range kvErrs {
+		code := err.ToSQLError().Code
+		c.Assert(code != mysql.ErrUnknown && code == uint16(err.Code()), IsTrue, Commentf("err: %v", err))
+	}
+}
diff --git a/util/admin/admin.go b/util/admin/admin.go
index fb5f302d4828f..d8cf0f7c243ba 100644
--- a/util/admin/admin.go
+++ b/util/admin/admin.go
@@ -432,21 +432,24 @@ func iterRecords(sessCtx sessionctx.Context, retriever kv.Retriever, t table.Tab
 	return nil
 }
 
-// admin error codes.
-const (
-	codeDataNotEqual terror.ErrCode = iota + 1
-	codeDDLJobNotFound
-	codeCancelFinishedJob
-	codeCannotCancelDDLJob
-)
-
 var (
 	// ErrDataInConsistent indicate that meets inconsistent data.
-	ErrDataInConsistent = terror.ClassAdmin.New(codeDataNotEqual, "data isn't equal")
+	ErrDataInConsistent = terror.ClassAdmin.New(mysql.ErrDataInConsistent, mysql.MySQLErrName[mysql.ErrDataInConsistent])
 	// ErrDDLJobNotFound indicates the job id was not found.
-	ErrDDLJobNotFound = terror.ClassAdmin.New(codeDDLJobNotFound, "DDL Job:%v not found")
+	ErrDDLJobNotFound = terror.ClassAdmin.New(mysql.ErrDDLJobNotFound, mysql.MySQLErrName[mysql.ErrDDLJobNotFound])
 	// ErrCancelFinishedDDLJob returns when cancel a finished ddl job.
-	ErrCancelFinishedDDLJob = terror.ClassAdmin.New(codeCancelFinishedJob, "This job:%v is finished, so can't be cancelled")
+	ErrCancelFinishedDDLJob = terror.ClassAdmin.New(mysql.ErrCancelFinishedDDLJob, mysql.MySQLErrName[mysql.ErrCancelFinishedDDLJob])
 	// ErrCannotCancelDDLJob returns when cancel a almost finished ddl job, because cancel in now may cause data inconsistency.
-	ErrCannotCancelDDLJob = terror.ClassAdmin.New(codeCannotCancelDDLJob, "This job:%v is almost finished, can't be cancelled now")
+	ErrCannotCancelDDLJob = terror.ClassAdmin.New(mysql.ErrCannotCancelDDLJob, mysql.MySQLErrName[mysql.ErrCannotCancelDDLJob])
 )
+
+func init() {
+	// Register terror to mysql error map.
+	mySQLErrCodes := map[terror.ErrCode]uint16{
+		mysql.ErrDataInConsistent:     mysql.ErrDataInConsistent,
+		mysql.ErrDDLJobNotFound:       mysql.ErrDDLJobNotFound,
+		mysql.ErrCancelFinishedDDLJob: mysql.ErrCancelFinishedDDLJob,
+		mysql.ErrCannotCancelDDLJob:   mysql.ErrCannotCancelDDLJob,
+	}
+	terror.ErrClassToMySQLCodes[terror.ClassAdmin] = mySQLErrCodes
+}
diff --git a/util/admin/admin_test.go b/util/admin/admin_test.go
index 5aede319c0c9a..d40c0f4b9cd9b 100644
--- a/util/admin/admin_test.go
+++ b/util/admin/admin_test.go
@@ -18,6 +18,8 @@ import (
 
 	. "github.com/pingcap/check"
 	"github.com/pingcap/parser/model"
+	"github.com/pingcap/parser/mysql"
+	"github.com/pingcap/parser/terror"
 	"github.com/pingcap/tidb/kv"
 	"github.com/pingcap/tidb/meta"
 	"github.com/pingcap/tidb/store/mockstore"
@@ -343,3 +345,16 @@ func (s *testSuite) TestIsJobRollbackable(c *C) {
 		c.Assert(re == ca.result, IsTrue)
 	}
 }
+
+func (s *testSuite) TestError(c *C) {
+	kvErrs := []*terror.Error{
+		ErrDataInConsistent,
+		ErrDDLJobNotFound,
+		ErrCancelFinishedDDLJob,
+		ErrCannotCancelDDLJob,
+	}
+	for _, err := range kvErrs {
+		code := err.ToSQLError().Code
+		c.Assert(code != mysql.ErrUnknown && code == uint16(err.Code()), IsTrue, Commentf("err: %v", err))
+	}
+}
diff --git a/util/ranger/points.go b/util/ranger/points.go
index b9f3a41eb5298..ed1a8d198067c 100644
--- a/util/ranger/points.go
+++ b/util/ranger/points.go
@@ -33,12 +33,7 @@ import (
 
 // Error instances.
 var (
-	ErrUnsupportedType = terror.ClassOptimizer.New(CodeUnsupportedType, "Unsupported type")
-)
-
-// Error codes.
-const (
-	CodeUnsupportedType terror.ErrCode = 1
+	ErrUnsupportedType = terror.ClassOptimizer.New(mysql.ErrUnsupportedType, mysql.MySQLErrName[mysql.ErrUnsupportedType])
 )
 
 // RangeType is alias for int.