diff --git a/cdc/entry/mounter.go b/cdc/entry/mounter.go
index 4d06c5d0064..3171e34385d 100644
--- a/cdc/entry/mounter.go
+++ b/cdc/entry/mounter.go
@@ -337,12 +337,18 @@ func parseJob(v []byte, startTs, CRTs uint64) (*timodel.Job, error) {
 
 func datum2Column(
 	tableInfo *model.TableInfo, datums map[int64]types.Datum, fillWithDefaultValue bool,
-) ([]*model.Column, []types.Datum, []*timodel.ColumnInfo, error) {
+) ([]*model.Column, []types.Datum, []*timodel.ColumnInfo, []rowcodec.ColInfo, error) {
 	cols := make([]*model.Column, len(tableInfo.RowColumnsOffset))
 	rawCols := make([]types.Datum, len(tableInfo.RowColumnsOffset))
+
+	// columnInfos and rowColumnInfos hold different column metadata,
+	// they should have the same length and order.
 	columnInfos := make([]*timodel.ColumnInfo, len(tableInfo.RowColumnsOffset))
+	rowColumnInfos := make([]rowcodec.ColInfo, len(tableInfo.RowColumnsOffset))
+
+	_, _, extendColumnInfos := tableInfo.GetRowColInfos()
 
-	for _, colInfo := range tableInfo.Columns {
+	for idx, colInfo := range tableInfo.Columns {
 		if !model.IsColCDCVisible(colInfo) {
 			log.Debug("skip the column which is not visible",
 				zap.String("table", tableInfo.Name.O), zap.String("column", colInfo.Name.O))
@@ -370,7 +376,7 @@ func datum2Column(
 			colDatums, colValue, size, warn, err = getDefaultOrZeroValue(colInfo)
 		}
 		if err != nil {
-			return nil, nil, nil, errors.Trace(err)
+			return nil, nil, nil, nil, errors.Trace(err)
 		}
 		if warn != "" {
 			log.Warn(warn, zap.String("table", tableInfo.TableName.String()),
@@ -391,8 +397,9 @@ func datum2Column(
 			ApproximateBytes: size + sizeOfEmptyColumn,
 		}
 		columnInfos[offset] = colInfo
+		rowColumnInfos[offset] = extendColumnInfos[idx]
 	}
-	return cols, rawCols, columnInfos, nil
+	return cols, rawCols, columnInfos, rowColumnInfos, nil
 }
 
 // return error if cannot get the expected checksum from the decoder
@@ -478,10 +485,11 @@ func (m *mounter) verifyChecksum(
 
 func (m *mounter) mountRowKVEntry(tableInfo *model.TableInfo, row *rowKVEntry, dataSize int64) (*model.RowChangedEvent, model.RowChangedDatums, error) {
 	var (
-		rawRow      model.RowChangedDatums
-		columnInfos []*timodel.ColumnInfo
-		matched     bool
-		err         error
+		rawRow            model.RowChangedDatums
+		columnInfos       []*timodel.ColumnInfo
+		extendColumnInfos []rowcodec.ColInfo
+		matched           bool
+		err               error
 
 		checksum *integrity.Checksum
 
@@ -503,7 +511,7 @@ func (m *mounter) mountRowKVEntry(tableInfo *model.TableInfo, row *rowKVEntry, d
 	if row.PreRowExist {
 		// FIXME(leoppro): using pre table info to mounter pre column datum
 		// the pre column and current column in one event may using different table info
-		preCols, preRawCols, columnInfos, err = datum2Column(tableInfo, row.PreRow, m.enableOldValue)
+		preCols, preRawCols, columnInfos, extendColumnInfos, err = datum2Column(tableInfo, row.PreRow, m.enableOldValue)
 		if err != nil {
 			return nil, rawRow, errors.Trace(err)
 		}
@@ -543,7 +551,7 @@ func (m *mounter) mountRowKVEntry(tableInfo *model.TableInfo, row *rowKVEntry, d
 		current uint32
 	)
 	if row.RowExist {
-		cols, rawCols, columnInfos, err = datum2Column(tableInfo, row.Row, true)
+		cols, rawCols, columnInfos, extendColumnInfos, err = datum2Column(tableInfo, row.Row, true)
 		if err != nil {
 			return nil, rawRow, errors.Trace(err)
 		}
@@ -572,7 +580,6 @@ func (m *mounter) mountRowKVEntry(tableInfo *model.TableInfo, row *rowKVEntry, d
 		intRowID = row.RecordID.IntValue()
 	}
 
-	_, _, colInfos := tableInfo.GetRowColInfos()
 	rawRow.PreRowDatums = preRawCols
 	rawRow.RowDatums = rawCols
 
@@ -597,7 +604,7 @@ func (m *mounter) mountRowKVEntry(tableInfo *model.TableInfo, row *rowKVEntry, d
 			TableID:     row.PhysicalTableID,
 			IsPartition: tableInfo.GetPartitionInfo() != nil,
 		},
-		ColInfos:   colInfos,
+		ColInfos:   extendColumnInfos,
 		TableInfo:  tableInfo,
 		Columns:    cols,
 		PreColumns: preCols,
diff --git a/cdc/entry/mounter_test.go b/cdc/entry/mounter_test.go
index b81b30e8bda..5bbc813852d 100644
--- a/cdc/entry/mounter_test.go
+++ b/cdc/entry/mounter_test.go
@@ -1282,7 +1282,7 @@ func TestBuildTableInfo(t *testing.T) {
 		originTI, err := ddl.BuildTableInfoFromAST(stmt.(*ast.CreateTableStmt))
 		require.NoError(t, err)
 		cdcTableInfo := model.WrapTableInfo(0, "test", 0, originTI)
-		cols, _, _, err := datum2Column(cdcTableInfo, map[int64]types.Datum{}, true)
+		cols, _, _, _, err := datum2Column(cdcTableInfo, map[int64]types.Datum{}, true)
 		require.NoError(t, err)
 		recoveredTI := model.BuildTiDBTableInfo(cols, cdcTableInfo.IndexColumnsOffset)
 		handle := sqlmodel.GetWhereHandle(recoveredTI, recoveredTI)
diff --git a/cdc/model/schema_storage.go b/cdc/model/schema_storage.go
index dae22eb05c3..281d2504dbf 100644
--- a/cdc/model/schema_storage.go
+++ b/cdc/model/schema_storage.go
@@ -66,8 +66,10 @@ type TableInfo struct {
 	HandleIndexID int64
 
 	IndexColumnsOffset [][]int
-	rowColInfos        []rowcodec.ColInfo
-	rowColFieldTps     map[int64]*types.FieldType
+	// rowColInfos extend the model.ColumnInfo with some extra information
+	// it's the same length and order with the model.TableInfo.Columns
+	rowColInfos    []rowcodec.ColInfo
+	rowColFieldTps map[int64]*types.FieldType
 }
 
 // WrapTableInfo creates a TableInfo from a timodel.TableInfo
diff --git a/pkg/sink/codec/avro/decoder.go b/pkg/sink/codec/avro/decoder.go
index 0b53320d974..cd4d5f93bf2 100644
--- a/pkg/sink/codec/avro/decoder.go
+++ b/pkg/sink/codec/avro/decoder.go
@@ -145,7 +145,13 @@ func (d *decoder) NextRowChangedEvent() (*model.RowChangedEvent, error) {
 		var holder map[string]interface{}
 		switch ty := field["type"].(type) {
 		case []interface{}:
-			holder = ty[1].(map[string]interface{})["connect.parameters"].(map[string]interface{})
+			if m, ok := ty[0].(map[string]interface{}); ok {
+				holder = m["connect.parameters"].(map[string]interface{})
+			} else if m, ok := ty[1].(map[string]interface{}); ok {
+				holder = m["connect.parameters"].(map[string]interface{})
+			} else {
+				log.Panic("type info is anything else", zap.Any("typeInfo", field["type"]))
+			}
 		case map[string]interface{}:
 			holder = ty["connect.parameters"].(map[string]interface{})
 		default:
@@ -278,6 +284,7 @@ func (d *decoder) NextResolvedEvent() (uint64, error) {
 		return 0, errors.New("value should not be empty")
 	}
 	ts := binary.BigEndian.Uint64(d.value[1:])
+	d.value = nil
 	return ts, nil
 }
 
@@ -297,6 +304,7 @@ func (d *decoder) NextDDLEvent() (*model.DDLEvent, error) {
 	if err != nil {
 		return nil, errors.WrapError(errors.ErrDecodeFailed, err)
 	}
+	d.value = nil
 	return result, nil
 }
 
@@ -392,9 +400,6 @@ func (d *decoder) verifyChecksum(columns []*model.Column, expected uint64) error
 		return errors.New("checksum mismatch")
 	}
 
-	log.Debug("checksum passed",
-		zap.Uint64("expected", expected), zap.Uint32("actual", checksum))
-
 	return nil
 }
 
diff --git a/pkg/sink/codec/avro/schema_registry.go b/pkg/sink/codec/avro/schema_registry.go
index 48ff6f3b347..f21d3bce1c2 100644
--- a/pkg/sink/codec/avro/schema_registry.go
+++ b/pkg/sink/codec/avro/schema_registry.go
@@ -304,7 +304,7 @@ func (m *SchemaManager) Lookup(
 		log.Error("Creating Avro codec failed", zap.Error(err))
 		return nil, cerror.WrapError(cerror.ErrAvroSchemaAPIError, err)
 	}
-	cacheEntry.schemaID = jsonResp.SchemaID
+	cacheEntry.schemaID = schemaID
 
 	m.cacheRWLock.Lock()
 	m.cache[key] = cacheEntry
diff --git a/scripts/check-diff-line-width.sh b/scripts/check-diff-line-width.sh
index b1d2ecb0eed..af65760cc44 100755
--- a/scripts/check-diff-line-width.sh
+++ b/scripts/check-diff-line-width.sh
@@ -20,8 +20,8 @@ set -e
 # the pattern `\(#[0-9]+\)$`. It's usually a master branch commit.
 BASE_HASH=$(git --no-pager log -E --grep='\(#[0-9]+\)$' -n 1 --format=format:%H)
 # Please contact TiFlow maintainers before changing following settings.
-WARN_THRESHOLD=80
-ERROR_THRESHOLD=100
+WARN_THRESHOLD=100
+ERROR_THRESHOLD=140
 
 git --no-pager diff $BASE_HASH -U0 -- cdc pkg cmd \
 	-- ':(exclude)*_gen.go' \