diff --git a/drainer/translator/flash.go b/drainer/translator/flash.go
index 91e4668ca..6179fa60a 100644
--- a/drainer/translator/flash.go
+++ b/drainer/translator/flash.go
@@ -16,7 +16,6 @@ import (
 	"github.com/pingcap/tidb/mysql"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
-	"github.com/pingcap/tidb/util/codec"
 )
 
 // flashTranslator translates TiDB binlog to flash sqls
@@ -42,7 +41,6 @@ func (f *flashTranslator) GenInsertSQLs(schema string, table *model.TableInfo, r
 	version := makeInternalVersionValue(uint64(commitTS))
 	delFlag := makeInternalDelmarkValue(false)
 
-	colsTypeMap := toFlashColumnTypeMap(columns)
 	columnList := genColumnList(columns)
 	// addition 2 holder is for del flag and version
 	columnPlaceholders := dml.GenColumnPlaceholders(len(columns) + 2)
@@ -50,34 +48,16 @@ func (f *flashTranslator) GenInsertSQLs(schema string, table *model.TableInfo, r
 
 	for _, row := range rows {
 		//decode the pk value
-		remain, pk, err := codec.DecodeOne(row)
-		hashKey := pk.GetInt64()
+		pk, columnValues, err := insertRowToDatums(table, row)
 		if err != nil {
 			return nil, nil, nil, errors.Trace(err)
 		}
 
-		columnValues, err := tablecodec.DecodeRow(remain, colsTypeMap, gotime.Local)
-		if err != nil {
-			return nil, nil, nil, errors.Trace(err)
-		}
-
-		if columnValues == nil {
-			columnValues = make(map[int64]types.Datum)
-		}
+		hashKey := pk.GetInt64()
 
 		var vals []interface{}
 		vals = append(vals, hashKey)
 		for _, col := range columns {
-			if IsPKHandleColumn(table, col) {
-				columnValues[col.ID] = pk
-				pkVal, err := formatFlashData(&pk, &col.FieldType)
-				if err != nil {
-					return nil, nil, nil, errors.Trace(err)
-				}
-				vals = append(vals, pkVal)
-				continue
-			}
-
 			val, ok := columnValues[col.ID]
 			if !ok {
 				vals = append(vals, col.DefaultValue)
diff --git a/drainer/translator/kafka.go b/drainer/translator/kafka.go
index e1e8a1e41..9a4d425c5 100644
--- a/drainer/translator/kafka.go
+++ b/drainer/translator/kafka.go
@@ -14,7 +14,6 @@ import (
 	"github.com/pingcap/tidb/mysql"
 	"github.com/pingcap/tidb/tablecodec"
 	"github.com/pingcap/tidb/types"
-	"github.com/pingcap/tidb/util/codec"
 )
 
 // kafkaTranslator translates TiDB binlog to self-description protobuf
@@ -129,38 +128,12 @@ func (p *kafkaTranslator) GenDDLSQL(sql string, schema string, commitTS int64) (
 }
 
 func insertRowToRow(tableInfo *model.TableInfo, raw []byte) (row *obinlog.Row, err error) {
+	_, columnValues, err := insertRowToDatums(tableInfo, raw)
 	columns := tableInfo.Columns
 
-	remain, pk, err := codec.DecodeOne(raw)
-	if err != nil {
-		log.Error(err)
-		err = errors.Trace(err)
-		return
-	}
-
-	log.Debugf("decode pk: %+v", pk)
-
-	colsTypeMap := util.ToColumnTypeMap(tableInfo.Columns)
-	columnValues, err := tablecodec.DecodeRow(remain, colsTypeMap, time.Local)
-	if err != nil {
-		log.Error(err)
-		err = errors.Trace(err)
-		return
-	}
-
-	// log.Debugf("decodeRow: %+v\n", columnValues)
-	// maybe only the pk column value
-	if columnValues == nil {
-		columnValues = make(map[int64]types.Datum)
-	}
-
 	row = new(obinlog.Row)
 
 	for _, col := range columns {
-		if IsPKHandleColumn(tableInfo, col) {
-			columnValues[col.ID] = pk
-		}
-
 		var column *obinlog.Column
 		val, ok := columnValues[col.ID]
 		if ok {
@@ -175,10 +148,6 @@ func insertRowToRow(tableInfo *model.TableInfo, raw []byte) (row *obinlog.Row, e
 		row.Columns = append(row.Columns, column)
 	}
 
-	if len(columnValues) == 0 {
-		panic(errors.New("columnValues is nil"))
-	}
-
 	return
 }
 
diff --git a/drainer/translator/mysql.go b/drainer/translator/mysql.go
index 9eb9b2515..bd5895b89 100644
--- a/drainer/translator/mysql.go
+++ b/drainer/translator/mysql.go
@@ -48,7 +48,6 @@ func (m *mysqlTranslator) GenInsertSQLs(schema string, table *model.TableInfo, r
 	keys := make([][]string, 0, len(rows))
 	values := make([][]interface{}, 0, len(rows))
 
-	colsTypeMap := util.ToColumnTypeMap(columns)
 	columnList := m.genColumnList(columns)
 	columnPlaceholders := dml.GenColumnPlaceholders((len(columns)))
 
@@ -59,29 +58,13 @@ func (m *mysqlTranslator) GenInsertSQLs(schema string, table *model.TableInfo, r
 	sql := fmt.Sprintf("%s into `%s`.`%s` (%s) values (%s);", insertStr, schema, table.Name, columnList, columnPlaceholders)
 
 	for _, row := range rows {
-		//decode the pk value
-		remain, pk, err := codec.DecodeOne(row)
+		_, columnValues, err := insertRowToDatums(table, row)
 		if err != nil {
 			return nil, nil, nil, errors.Trace(err)
 		}
 
-		columnValues, err := tablecodec.DecodeRow(remain, colsTypeMap, time.Local)
-		if err != nil {
-			return nil, nil, nil, errors.Trace(err)
-		}
-
-		if columnValues == nil {
-			columnValues = make(map[int64]types.Datum)
-		}
-
 		var vals []interface{}
 		for _, col := range columns {
-			if IsPKHandleColumn(table, col) {
-				columnValues[col.ID] = pk
-				vals = append(vals, pk.GetValue())
-				continue
-			}
-
 			val, ok := columnValues[col.ID]
 			if !ok {
 				vals = append(vals, col.DefaultValue)
@@ -95,10 +78,6 @@ func (m *mysqlTranslator) GenInsertSQLs(schema string, table *model.TableInfo, r
 			}
 		}
 
-		if len(columnValues) == 0 {
-			panic(errors.New("columnValues is nil"))
-		}
-
 		sqls = append(sqls, sql)
 		values = append(values, vals)
 		// generate dispatching key
diff --git a/drainer/translator/pb.go b/drainer/translator/pb.go
index b2f1a0d2e..3076d745c 100644
--- a/drainer/translator/pb.go
+++ b/drainer/translator/pb.go
@@ -35,24 +35,13 @@ func (p *pbTranslator) GenInsertSQLs(schema string, table *model.TableInfo, rows
 	sqls := make([]string, 0, len(rows))
 	keys := make([][]string, 0, len(rows))
 	values := make([][]interface{}, 0, len(rows))
-	colsTypeMap := util.ToColumnTypeMap(columns)
 
 	for _, row := range rows {
-		//decode the pk value
-		remain, pk, err := codec.DecodeOne(row)
-		if err != nil {
-			return nil, nil, nil, errors.Annotatef(err, "table `%s`.`%s`", schema, table.Name)
-		}
-
-		columnValues, err := tablecodec.DecodeRow(remain, colsTypeMap, time.Local)
+		_, columnValues, err := insertRowToDatums(table, row)
 		if err != nil {
 			return nil, nil, nil, errors.Annotatef(err, "table `%s`.`%s`", schema, table.Name)
 		}
 
-		if columnValues == nil {
-			columnValues = make(map[int64]types.Datum)
-		}
-
 		var (
 			vals       = make([]types.Datum, 0, len(columns))
 			cols       = make([]string, 0, len(columns))
@@ -60,10 +49,6 @@ func (p *pbTranslator) GenInsertSQLs(schema string, table *model.TableInfo, rows
 			mysqlTypes = make([]string, 0, len(columns))
 		)
 		for _, col := range columns {
-			if IsPKHandleColumn(table, col) {
-				columnValues[col.ID] = pk
-			}
-
 			cols = append(cols, col.Name.O)
 			tps = append(tps, col.Tp)
 			mysqlTypes = append(mysqlTypes, types.TypeToStr(col.Tp, col.Charset))
@@ -83,10 +68,6 @@ func (p *pbTranslator) GenInsertSQLs(schema string, table *model.TableInfo, rows
 			}
 		}
 
-		if len(columnValues) == 0 {
-			panic(errors.New("columnValues is nil"))
-		}
-
 		rowData, err := encodeRow(vals, cols, tps, mysqlTypes)
 		if err != nil {
 			return nil, nil, nil, errors.Trace(err)
diff --git a/drainer/translator/translator.go b/drainer/translator/translator.go
index 4e289f886..425347a63 100644
--- a/drainer/translator/translator.go
+++ b/drainer/translator/translator.go
@@ -1,9 +1,15 @@
 package translator
 
 import (
+	"time"
+
 	"github.com/ngaut/log"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
+	"github.com/pingcap/tidb-binlog/pkg/util"
+	"github.com/pingcap/tidb/tablecodec"
+	"github.com/pingcap/tidb/types"
+	"github.com/pingcap/tidb/util/codec"
 )
 
 // OpType represents type of the operation
@@ -69,3 +75,31 @@ func New(providerName string) (SQLTranslator, error) {
 
 	return translator, nil
 }
+
+func insertRowToDatums(table *model.TableInfo, row []byte) (pk types.Datum, datums map[int64]types.Datum, err error) {
+	colsTypeMap := util.ToColumnTypeMap(table.Columns)
+
+	// decode the pk value
+	var remain []byte
+	remain, pk, err = codec.DecodeOne(row)
+	if err != nil {
+		return types.Datum{}, nil, errors.Trace(err)
+	}
+
+	datums, err = tablecodec.DecodeRow(remain, colsTypeMap, time.Local)
+	if err != nil {
+		return types.Datum{}, nil, errors.Trace(err)
+	}
+
+	if datums == nil {
+		datums = make(map[int64]types.Datum)
+	}
+
+	for _, col := range table.Columns {
+		if IsPKHandleColumn(table, col) {
+			datums[col.ID] = pk
+		}
+	}
+
+	return
+}