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avro.go
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avro.go
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// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package avro
import (
"bytes"
"context"
"encoding/binary"
"encoding/json"
"math/big"
"sort"
"strconv"
"strings"
"github.com/linkedin/goavro/v2"
"github.com/pingcap/errors"
"github.com/pingcap/log"
timodel "github.com/pingcap/tidb/pkg/meta/model"
"github.com/pingcap/tidb/pkg/parser/mysql"
"github.com/pingcap/tidb/pkg/types"
"github.com/pingcap/tidb/pkg/util/rowcodec"
"github.com/pingcap/tiflow/cdc/model"
"github.com/pingcap/tiflow/pkg/config"
cerror "github.com/pingcap/tiflow/pkg/errors"
"github.com/pingcap/tiflow/pkg/sink/codec"
"github.com/pingcap/tiflow/pkg/sink/codec/common"
"github.com/tikv/client-go/v2/oracle"
"go.uber.org/zap"
)
// BatchEncoder converts the events to binary Avro data
type BatchEncoder struct {
namespace string
schemaM SchemaManager
result []*common.Message
config *common.Config
}
type avroEncodeInput struct {
columns []*model.Column
colInfos []rowcodec.ColInfo
}
func (r *avroEncodeInput) Less(i, j int) bool {
return r.colInfos[i].ID < r.colInfos[j].ID
}
func (r *avroEncodeInput) Len() int {
return len(r.columns)
}
func (r *avroEncodeInput) Swap(i, j int) {
r.colInfos[i], r.colInfos[j] = r.colInfos[j], r.colInfos[i]
r.columns[i], r.columns[j] = r.columns[j], r.columns[i]
}
type avroEncodeResult struct {
data []byte
// header is the message header, it will be encoder into the head
// of every single avro message. Note: Confluent schema registry and
// Aws Glue schema registry have different header format.
header []byte
}
func (a *BatchEncoder) encodeKey(ctx context.Context, topic string, e *model.RowChangedEvent) ([]byte, error) {
cols, colInfos := e.HandleKeyColInfos()
// result may be nil if the event has no handle key columns, this may happen in the force replicate mode.
// todo: disallow force replicate mode if using the avro.
if len(cols) == 0 {
return nil, nil
}
keyColumns := &avroEncodeInput{
columns: cols,
colInfos: colInfos,
}
avroCodec, header, err := a.getKeySchemaCodec(ctx, topic, &e.TableInfo.TableName, e.TableInfo.Version, keyColumns)
if err != nil {
return nil, errors.Trace(err)
}
native, err := a.columns2AvroData(keyColumns)
if err != nil {
log.Error("avro: key converting to native failed", zap.Error(err))
return nil, errors.Trace(err)
}
bin, err := avroCodec.BinaryFromNative(nil, native)
if err != nil {
log.Error("avro: key converting to Avro binary failed", zap.Error(err))
return nil, cerror.WrapError(cerror.ErrAvroEncodeToBinary, err)
}
result := &avroEncodeResult{
data: bin,
header: header,
}
data, err := result.toEnvelope()
if err != nil {
return nil, errors.Trace(err)
}
return data, nil
}
func topicName2SchemaSubjects(topicName, subjectSuffix string) string {
return topicName + subjectSuffix
}
func (a *BatchEncoder) getValueSchemaCodec(
ctx context.Context, topic string, tableName *model.TableName, tableVersion uint64, input *avroEncodeInput,
) (*goavro.Codec, []byte, error) {
schemaGen := func() (string, error) {
schema, err := a.value2AvroSchema(tableName, input)
if err != nil {
log.Error("avro: generating value schema failed", zap.Error(err))
return "", errors.Trace(err)
}
return schema, nil
}
subject := topicName2SchemaSubjects(topic, valueSchemaSuffix)
avroCodec, header, err := a.schemaM.GetCachedOrRegister(ctx, subject, tableVersion, schemaGen)
if err != nil {
return nil, nil, errors.Trace(err)
}
return avroCodec, header, nil
}
func (a *BatchEncoder) getKeySchemaCodec(
ctx context.Context, topic string, tableName *model.TableName, tableVersion uint64, keyColumns *avroEncodeInput,
) (*goavro.Codec, []byte, error) {
schemaGen := func() (string, error) {
schema, err := a.key2AvroSchema(tableName, keyColumns)
if err != nil {
log.Error("AvroEventBatchEncoder: generating key schema failed", zap.Error(err))
return "", errors.Trace(err)
}
return schema, nil
}
subject := topicName2SchemaSubjects(topic, keySchemaSuffix)
avroCodec, header, err := a.schemaM.GetCachedOrRegister(ctx, subject, tableVersion, schemaGen)
if err != nil {
return nil, nil, errors.Trace(err)
}
return avroCodec, header, nil
}
func (a *BatchEncoder) encodeValue(ctx context.Context, topic string, e *model.RowChangedEvent) ([]byte, error) {
if e.IsDelete() {
return nil, nil
}
input := &avroEncodeInput{
columns: e.GetColumns(),
colInfos: e.TableInfo.GetColInfosForRowChangedEvent(),
}
if len(input.columns) == 0 {
return nil, nil
}
avroCodec, header, err := a.getValueSchemaCodec(ctx, topic, &e.TableInfo.TableName, e.TableInfo.Version, input)
if err != nil {
return nil, errors.Trace(err)
}
native, err := a.columns2AvroData(input)
if err != nil {
log.Error("avro: converting value to native failed", zap.Error(err))
return nil, errors.Trace(err)
}
if a.config.EnableTiDBExtension {
native = a.nativeValueWithExtension(native, e)
}
bin, err := avroCodec.BinaryFromNative(nil, native)
if err != nil {
log.Error("avro: converting value to Avro binary failed", zap.Error(err))
return nil, cerror.WrapError(cerror.ErrAvroEncodeToBinary, err)
}
result := &avroEncodeResult{
data: bin,
header: header,
}
data, err := result.toEnvelope()
if err != nil {
return nil, errors.Trace(err)
}
return data, nil
}
// AppendRowChangedEvent appends a row change event to the encoder
// NOTE: the encoder can only store one RowChangedEvent!
func (a *BatchEncoder) AppendRowChangedEvent(
ctx context.Context,
topic string,
e *model.RowChangedEvent,
callback func(),
) error {
topic = sanitizeTopic(topic)
key, err := a.encodeKey(ctx, topic, e)
if err != nil {
log.Error("avro encoding key failed", zap.Error(err), zap.Any("event", e))
return errors.Trace(err)
}
value, err := a.encodeValue(ctx, topic, e)
if err != nil {
log.Error("avro encoding value failed", zap.Error(err), zap.Any("event", e))
return errors.Trace(err)
}
message := common.NewMsg(
config.ProtocolAvro,
key,
value,
e.CommitTs,
model.MessageTypeRow,
e.TableInfo.GetSchemaNamePtr(),
e.TableInfo.GetTableNamePtr(),
)
message.Callback = callback
message.IncRowsCount()
if message.Length() > a.config.MaxMessageBytes {
log.Warn("Single message is too large for avro",
zap.Int("maxMessageBytes", a.config.MaxMessageBytes),
zap.Int("length", message.Length()),
zap.Any("table", e.TableInfo.TableName))
return cerror.ErrMessageTooLarge.GenWithStackByArgs(message.Length())
}
a.result = append(a.result, message)
return nil
}
// EncodeCheckpointEvent only encode checkpoint event if the watermark event is enabled
// it's only used for the testing purpose.
func (a *BatchEncoder) EncodeCheckpointEvent(ts uint64) (*common.Message, error) {
if a.config.EnableTiDBExtension && a.config.AvroEnableWatermark {
buf := new(bytes.Buffer)
data := []interface{}{checkpointByte, ts}
for _, v := range data {
err := binary.Write(buf, binary.BigEndian, v)
if err != nil {
return nil, cerror.WrapError(cerror.ErrAvroToEnvelopeError, err)
}
}
value := buf.Bytes()
return common.NewResolvedMsg(config.ProtocolAvro, nil, value, ts), nil
}
return nil, nil
}
type ddlEvent struct {
Query string `json:"query"`
Type timodel.ActionType `json:"type"`
Schema string `json:"schema"`
Table string `json:"table"`
CommitTs uint64 `json:"commitTs"`
}
// EncodeDDLEvent only encode DDL event if the watermark event is enabled
// it's only used for the testing purpose.
func (a *BatchEncoder) EncodeDDLEvent(e *model.DDLEvent) (*common.Message, error) {
if a.config.EnableTiDBExtension && a.config.AvroEnableWatermark {
buf := new(bytes.Buffer)
_ = binary.Write(buf, binary.BigEndian, ddlByte)
event := &ddlEvent{
Query: e.Query,
Type: e.Type,
Schema: e.TableInfo.TableName.Schema,
Table: e.TableInfo.TableName.Table,
CommitTs: e.CommitTs,
}
data, err := json.Marshal(event)
if err != nil {
return nil, cerror.WrapError(cerror.ErrAvroToEnvelopeError, err)
}
buf.Write(data)
value := buf.Bytes()
return common.NewDDLMsg(config.ProtocolAvro, nil, value, e), nil
}
return nil, nil
}
// Build Messages
func (a *BatchEncoder) Build() (messages []*common.Message) {
result := a.result
a.result = nil
return result
}
const (
insertOperation = "c"
updateOperation = "u"
)
func getOperation(e *model.RowChangedEvent) string {
if e.IsInsert() {
return insertOperation
} else if e.IsUpdate() {
return updateOperation
}
return ""
}
func (a *BatchEncoder) nativeValueWithExtension(
native map[string]interface{},
e *model.RowChangedEvent,
) map[string]interface{} {
native[tidbOp] = getOperation(e)
native[tidbCommitTs] = int64(e.CommitTs)
native[tidbPhysicalTime] = oracle.ExtractPhysical(e.CommitTs)
if a.config.EnableRowChecksum && e.Checksum != nil {
native[tidbRowLevelChecksum] = strconv.FormatUint(uint64(e.Checksum.Current), 10)
native[tidbCorrupted] = e.Checksum.Corrupted
native[tidbChecksumVersion] = e.Checksum.Version
}
return native
}
type avroSchemaTop struct {
Tp string `json:"type"`
Name string `json:"name"`
Namespace string `json:"namespace"`
Fields []map[string]interface{} `json:"fields"`
}
const (
tidbType = "tidb_type"
tidbOp = "_tidb_op"
tidbCommitTs = "_tidb_commit_ts"
tidbPhysicalTime = "_tidb_commit_physical_time"
// row level checksum related fields
tidbRowLevelChecksum = "_tidb_row_level_checksum"
tidbChecksumVersion = "_tidb_checksum_version"
tidbCorrupted = "_tidb_corrupted"
)
var type2TiDBType = map[byte]string{
mysql.TypeTiny: "INT",
mysql.TypeShort: "INT",
mysql.TypeInt24: "INT",
mysql.TypeLong: "INT",
mysql.TypeLonglong: "BIGINT",
mysql.TypeFloat: "FLOAT",
mysql.TypeDouble: "DOUBLE",
mysql.TypeBit: "BIT",
mysql.TypeNewDecimal: "DECIMAL",
mysql.TypeTinyBlob: "TEXT",
mysql.TypeMediumBlob: "TEXT",
mysql.TypeBlob: "TEXT",
mysql.TypeLongBlob: "TEXT",
mysql.TypeVarchar: "TEXT",
mysql.TypeVarString: "TEXT",
mysql.TypeString: "TEXT",
mysql.TypeEnum: "ENUM",
mysql.TypeSet: "SET",
mysql.TypeJSON: "JSON",
mysql.TypeDate: "DATE",
mysql.TypeDatetime: "DATETIME",
mysql.TypeTimestamp: "TIMESTAMP",
mysql.TypeDuration: "TIME",
mysql.TypeYear: "YEAR",
mysql.TypeTiDBVectorFloat32: "TiDBVECTORFloat32",
}
func getTiDBTypeFromColumn(col *model.Column) string {
tt := type2TiDBType[col.Type]
if col.Flag.IsUnsigned() && (tt == "INT" || tt == "BIGINT") {
return tt + " UNSIGNED"
}
if col.Flag.IsBinary() && tt == "TEXT" {
return "BLOB"
}
return tt
}
func flagFromTiDBType(tp string) model.ColumnFlagType {
var flag model.ColumnFlagType
if strings.Contains(tp, "UNSIGNED") {
flag.SetIsUnsigned()
}
return flag
}
func mysqlTypeFromTiDBType(tidbType string) byte {
var result byte
switch tidbType {
case "INT", "INT UNSIGNED":
result = mysql.TypeLong
case "BIGINT", "BIGINT UNSIGNED":
result = mysql.TypeLonglong
case "FLOAT":
result = mysql.TypeFloat
case "DOUBLE":
result = mysql.TypeDouble
case "BIT":
result = mysql.TypeBit
case "DECIMAL":
result = mysql.TypeNewDecimal
case "TEXT":
result = mysql.TypeVarchar
case "BLOB":
result = mysql.TypeLongBlob
case "ENUM":
result = mysql.TypeEnum
case "SET":
result = mysql.TypeSet
case "JSON":
result = mysql.TypeJSON
case "DATE":
result = mysql.TypeDate
case "DATETIME":
result = mysql.TypeDatetime
case "TIMESTAMP":
result = mysql.TypeTimestamp
case "TIME":
result = mysql.TypeDuration
case "YEAR":
result = mysql.TypeYear
case "TiDBVECTORFloat32":
result = mysql.TypeTiDBVectorFloat32
default:
log.Panic("this should not happen, unknown TiDB type", zap.String("type", tidbType))
}
return result
}
const (
replacementChar = "_"
numberPrefix = "_"
)
// sanitizeName escapes not permitted chars for avro
// debezium-core/src/main/java/io/debezium/schema/FieldNameSelector.java
// https://avro.apache.org/docs/current/spec.html#names
func sanitizeName(name string) string {
changed := false
var sb strings.Builder
for i, c := range name {
if i == 0 && (c >= '0' && c <= '9') {
sb.WriteString(numberPrefix)
sb.WriteRune(c)
changed = true
} else if !(c == '_' ||
('a' <= c && c <= 'z') ||
('A' <= c && c <= 'Z') ||
('0' <= c && c <= '9')) {
sb.WriteString(replacementChar)
changed = true
} else {
sb.WriteRune(c)
}
}
sanitizedName := sb.String()
if changed {
log.Warn(
"Name is potentially not safe for serialization, replace it",
zap.String("name", name),
zap.String("replacedName", sanitizedName),
)
}
return sanitizedName
}
// sanitizeTopic escapes ".", it may have special meanings for sink connectors
func sanitizeTopic(name string) string {
return strings.ReplaceAll(name, ".", replacementChar)
}
// https://github.com/debezium/debezium/blob/9f7ede0e0695f012c6c4e715e96aed85eecf6b5f \
// /debezium-connector-mysql/src/main/java/io/debezium/connector/mysql/antlr/ \
// MySqlAntlrDdlParser.java#L374
func escapeEnumAndSetOptions(option string) string {
option = strings.ReplaceAll(option, ",", "\\,")
option = strings.ReplaceAll(option, "\\'", "'")
option = strings.ReplaceAll(option, "''", "'")
return option
}
func getAvroNamespace(namespace string, schema string) string {
return sanitizeName(namespace) + "." + sanitizeName(schema)
}
type avroSchema struct {
Type string `json:"type"`
// connect.parameters is designated field extracted by schema registry
Parameters map[string]string `json:"connect.parameters"`
}
type avroLogicalTypeSchema struct {
avroSchema
LogicalType string `json:"logicalType"`
Precision interface{} `json:"precision,omitempty"`
Scale interface{} `json:"scale,omitempty"`
}
func (a *BatchEncoder) schemaWithExtension(
top *avroSchemaTop,
) *avroSchemaTop {
top.Fields = append(top.Fields,
map[string]interface{}{
"name": tidbOp,
"type": "string",
"default": "",
},
map[string]interface{}{
"name": tidbCommitTs,
"type": "long",
"default": 0,
},
map[string]interface{}{
"name": tidbPhysicalTime,
"type": "long",
"default": 0,
},
)
if a.config.EnableRowChecksum {
top.Fields = append(top.Fields,
map[string]interface{}{
"name": tidbRowLevelChecksum,
"type": "string",
"default": "",
},
map[string]interface{}{
"name": tidbCorrupted,
"type": "boolean",
"default": false,
},
map[string]interface{}{
"name": tidbChecksumVersion,
"type": "int",
"default": 0,
})
}
return top
}
func (a *BatchEncoder) columns2AvroSchema(
tableName *model.TableName,
input *avroEncodeInput,
) (*avroSchemaTop, error) {
top := &avroSchemaTop{
Tp: "record",
Name: sanitizeName(tableName.Table),
Namespace: getAvroNamespace(a.namespace, tableName.Schema),
Fields: nil,
}
for i, col := range input.columns {
if col == nil {
continue
}
avroType, err := a.columnToAvroSchema(col, input.colInfos[i].Ft)
if err != nil {
return nil, err
}
field := make(map[string]interface{})
field["name"] = sanitizeName(col.Name)
copied := *col
copied.Value = copied.Default
defaultValue, _, err := a.columnToAvroData(&copied, input.colInfos[i].Ft)
if err != nil {
log.Error("fail to get default value for avro schema")
return nil, errors.Trace(err)
}
// goavro doesn't support set default value for logical type
// https://github.com/linkedin/goavro/issues/202
if _, ok := avroType.(avroLogicalTypeSchema); ok {
if col.Flag.IsNullable() {
field["type"] = []interface{}{"null", avroType}
field["default"] = nil
} else {
field["type"] = avroType
}
} else {
if col.Flag.IsNullable() {
// https://stackoverflow.com/questions/22938124/avro-field-default-values
if defaultValue == nil {
field["type"] = []interface{}{"null", avroType}
} else {
field["type"] = []interface{}{avroType, "null"}
}
field["default"] = defaultValue
} else {
field["type"] = avroType
if defaultValue != nil {
field["default"] = defaultValue
}
}
}
top.Fields = append(top.Fields, field)
}
return top, nil
}
func (a *BatchEncoder) value2AvroSchema(
tableName *model.TableName,
input *avroEncodeInput,
) (string, error) {
if a.config.EnableRowChecksum {
sort.Sort(input)
}
top, err := a.columns2AvroSchema(tableName, input)
if err != nil {
return "", err
}
if a.config.EnableTiDBExtension {
top = a.schemaWithExtension(top)
}
str, err := json.Marshal(top)
if err != nil {
return "", cerror.WrapError(cerror.ErrAvroMarshalFailed, err)
}
log.Info("avro: row to schema",
zap.ByteString("schema", str),
zap.Bool("enableTiDBExtension", a.config.EnableRowChecksum),
zap.Bool("enableRowLevelChecksum", a.config.EnableRowChecksum))
return string(str), nil
}
func (a *BatchEncoder) key2AvroSchema(
tableName *model.TableName,
keyColumns *avroEncodeInput,
) (string, error) {
top, err := a.columns2AvroSchema(tableName, keyColumns)
if err != nil {
return "", err
}
str, err := json.Marshal(top)
if err != nil {
return "", cerror.WrapError(cerror.ErrAvroMarshalFailed, err)
}
log.Info("avro: key to schema", zap.ByteString("schema", str))
return string(str), nil
}
func (a *BatchEncoder) columns2AvroData(
input *avroEncodeInput,
) (map[string]interface{}, error) {
ret := make(map[string]interface{}, len(input.columns))
for i, col := range input.columns {
if col == nil {
continue
}
data, str, err := a.columnToAvroData(col, input.colInfos[i].Ft)
if err != nil {
return nil, err
}
// https: //pkg.go.dev/github.com/linkedin/goavro/v2#Union
if col.Flag.IsNullable() {
ret[sanitizeName(col.Name)] = goavro.Union(str, data)
} else {
ret[sanitizeName(col.Name)] = data
}
}
log.Debug("rowToAvroData", zap.Any("data", ret))
return ret, nil
}
func (a *BatchEncoder) columnToAvroSchema(
col *model.Column,
ft *types.FieldType,
) (interface{}, error) {
tt := getTiDBTypeFromColumn(col)
switch col.Type {
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24:
// BOOL/TINYINT/SMALLINT/MEDIUMINT
return avroSchema{
Type: "int",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeLong: // INT
if col.Flag.IsUnsigned() {
return avroSchema{
Type: "long",
Parameters: map[string]string{tidbType: tt},
}, nil
}
return avroSchema{
Type: "int",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeLonglong: // BIGINT
t := "long"
if col.Flag.IsUnsigned() &&
a.config.AvroBigintUnsignedHandlingMode == common.BigintUnsignedHandlingModeString {
t = "string"
}
return avroSchema{
Type: t,
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeFloat:
return avroSchema{
Type: "float",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeDouble:
return avroSchema{
Type: "double",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeBit:
displayFlen := ft.GetFlen()
if displayFlen == -1 {
displayFlen, _ = mysql.GetDefaultFieldLengthAndDecimal(col.Type)
}
return avroSchema{
Type: "bytes",
Parameters: map[string]string{
tidbType: tt,
"length": strconv.Itoa(displayFlen),
},
}, nil
case mysql.TypeNewDecimal:
if a.config.AvroDecimalHandlingMode == common.DecimalHandlingModePrecise {
defaultFlen, defaultDecimal := mysql.GetDefaultFieldLengthAndDecimal(ft.GetType())
displayFlen, displayDecimal := ft.GetFlen(), ft.GetDecimal()
// length not specified, set it to system type default
if displayFlen == -1 {
displayFlen = defaultFlen
}
if displayDecimal == -1 {
displayDecimal = defaultDecimal
}
return avroLogicalTypeSchema{
avroSchema: avroSchema{
Type: "bytes",
Parameters: map[string]string{tidbType: tt},
},
LogicalType: "decimal",
Precision: displayFlen,
Scale: displayDecimal,
}, nil
}
// decimalHandlingMode == string
return avroSchema{
Type: "string",
Parameters: map[string]string{tidbType: tt},
}, nil
// TINYTEXT/MEDIUMTEXT/TEXT/LONGTEXT/CHAR/VARCHAR
// TINYBLOB/MEDIUMBLOB/BLOB/LONGBLOB/BINARY/VARBINARY
case mysql.TypeVarchar,
mysql.TypeString,
mysql.TypeVarString,
mysql.TypeTinyBlob,
mysql.TypeMediumBlob,
mysql.TypeLongBlob,
mysql.TypeBlob:
t := "string"
if col.Flag.IsBinary() {
t = "bytes"
}
return avroSchema{
Type: t,
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeEnum, mysql.TypeSet:
es := make([]string, 0, len(ft.GetElems()))
for _, e := range ft.GetElems() {
e = escapeEnumAndSetOptions(e)
es = append(es, e)
}
return avroSchema{
Type: "string",
Parameters: map[string]string{
tidbType: tt,
"allowed": strings.Join(es, ","),
},
}, nil
case mysql.TypeJSON:
return avroSchema{
Type: "string",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp, mysql.TypeDuration:
return avroSchema{
Type: "string",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeYear:
return avroSchema{
Type: "int",
Parameters: map[string]string{tidbType: tt},
}, nil
case mysql.TypeTiDBVectorFloat32:
return avroSchema{
Type: "string",
Parameters: map[string]string{tidbType: tt},
}, nil
default:
log.Error("unknown mysql type", zap.Any("mysqlType", col.Type))
return nil, cerror.ErrAvroEncodeFailed.GenWithStack("unknown mysql type")
}
}
func (a *BatchEncoder) columnToAvroData(
col *model.Column,
ft *types.FieldType,
) (interface{}, string, error) {
if col.Value == nil {
return nil, "null", nil
}
switch col.Type {
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24:
if v, ok := col.Value.(string); ok {
n, err := strconv.ParseInt(v, 10, 32)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return int32(n), "int", nil
}
if col.Flag.IsUnsigned() {
return int32(col.Value.(uint64)), "int", nil
}
return int32(col.Value.(int64)), "int", nil
case mysql.TypeLong:
if v, ok := col.Value.(string); ok {
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
if col.Flag.IsUnsigned() {
return n, "long", nil
}
return int32(n), "int", nil
}
if col.Flag.IsUnsigned() {
return int64(col.Value.(uint64)), "long", nil
}
return int32(col.Value.(int64)), "int", nil
case mysql.TypeLonglong:
if v, ok := col.Value.(string); ok {
if col.Flag.IsUnsigned() {
if a.config.AvroBigintUnsignedHandlingMode == common.BigintUnsignedHandlingModeString {
return v, "string", nil
}
n, err := strconv.ParseUint(v, 10, 64)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return int64(n), "long", nil
}
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return n, "long", nil
}
if col.Flag.IsUnsigned() {
if a.config.AvroBigintUnsignedHandlingMode == common.BigintUnsignedHandlingModeLong {
return int64(col.Value.(uint64)), "long", nil
}
// bigintUnsignedHandlingMode == "string"
return strconv.FormatUint(col.Value.(uint64), 10), "string", nil
}
return col.Value.(int64), "long", nil
case mysql.TypeFloat:
if v, ok := col.Value.(string); ok {
n, err := strconv.ParseFloat(v, 32)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return n, "float", nil
}
return col.Value.(float32), "float", nil
case mysql.TypeDouble:
if v, ok := col.Value.(string); ok {
n, err := strconv.ParseFloat(v, 64)
if err != nil {
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return n, "double", nil
}
return col.Value.(float64), "double", nil
case mysql.TypeBit:
if v, ok := col.Value.(string); ok {
return []byte(v), "bytes", nil
}
return []byte(types.NewBinaryLiteralFromUint(col.Value.(uint64), -1)), "bytes", nil
case mysql.TypeNewDecimal:
if a.config.AvroDecimalHandlingMode == common.DecimalHandlingModePrecise {
v, succ := new(big.Rat).SetString(col.Value.(string))
if !succ {
return nil, "", cerror.ErrAvroEncodeFailed.GenWithStack(
"fail to encode Decimal value",
)
}
return v, "bytes.decimal", nil
}
// decimalHandlingMode == "string"
return col.Value.(string), "string", nil
case mysql.TypeVarchar,
mysql.TypeString,
mysql.TypeVarString,
mysql.TypeTinyBlob,
mysql.TypeBlob,
mysql.TypeMediumBlob,
mysql.TypeLongBlob:
if col.Flag.IsBinary() {
if v, ok := col.Value.(string); ok {
return []byte(v), "bytes", nil
}
return col.Value, "bytes", nil
}
if v, ok := col.Value.(string); ok {
return v, "string", nil
}
return string(col.Value.([]byte)), "string", nil
case mysql.TypeEnum:
if v, ok := col.Value.(string); ok {
return v, "string", nil
}
elements := ft.GetElems()
number := col.Value.(uint64)
enumVar, err := types.ParseEnumValue(elements, number)
if err != nil {
log.Info("avro encoder parse enum value failed", zap.Strings("elements", elements), zap.Uint64("number", number))
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return enumVar.Name, "string", nil
case mysql.TypeSet:
if v, ok := col.Value.(string); ok {
return v, "string", nil
}
elements := ft.GetElems()
number := col.Value.(uint64)
setVar, err := types.ParseSetValue(elements, number)
if err != nil {
log.Info("avro encoder parse set value failed",
zap.Strings("elements", elements), zap.Uint64("number", number), zap.Error(err))
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return setVar.Name, "string", nil
case mysql.TypeJSON:
return col.Value.(string), "string", nil
case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp, mysql.TypeDuration:
return col.Value.(string), "string", nil
case mysql.TypeYear:
if v, ok := col.Value.(string); ok {
n, err := strconv.ParseInt(v, 10, 32)
if err != nil {
log.Info("avro encoder parse year value failed", zap.String("value", v), zap.Error(err))
return nil, "", cerror.WrapError(cerror.ErrAvroEncodeFailed, err)
}
return int32(n), "int", nil
}
return int32(col.Value.(int64)), "int", nil
case mysql.TypeTiDBVectorFloat32:
if vec, ok := col.Value.(types.VectorFloat32); ok {
return vec.String(), "string", nil
}
return nil, "", cerror.ErrAvroEncodeFailed
default:
log.Error("unknown mysql type", zap.Any("value", col.Value), zap.Any("mysqlType", col.Type))
return nil, "", cerror.ErrAvroEncodeFailed.GenWithStack("unknown mysql type")
}
}
const (
// avro does not send ddl and checkpoint message, the following 2 field is used to distinguish
// TiCDC DDL event and checkpoint event, only used for testing purpose, not for production
ddlByte = uint8(1)
checkpointByte = uint8(2)
)
func (r *avroEncodeResult) toEnvelope() ([]byte, error) {