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payload_reader.go
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/
payload_reader.go
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package storage
import (
"bytes"
"context"
"fmt"
"github.com/apache/arrow/go/v12/arrow"
"github.com/apache/arrow/go/v12/arrow/memory"
"github.com/apache/arrow/go/v12/parquet"
"github.com/apache/arrow/go/v12/parquet/file"
"github.com/apache/arrow/go/v12/parquet/pqarrow"
"github.com/cockroachdb/errors"
"github.com/golang/protobuf/proto"
"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
"github.com/milvus-io/milvus/pkg/util/typeutil"
)
// PayloadReader reads data from payload
type PayloadReader struct {
reader *file.Reader
colType schemapb.DataType
numRows int64
}
var _ PayloadReaderInterface = (*PayloadReader)(nil)
func NewPayloadReader(colType schemapb.DataType, buf []byte) (*PayloadReader, error) {
if len(buf) == 0 {
return nil, errors.New("create Payload reader failed, buffer is empty")
}
parquetReader, err := file.NewParquetReader(bytes.NewReader(buf))
if err != nil {
return nil, err
}
return &PayloadReader{reader: parquetReader, colType: colType, numRows: parquetReader.NumRows()}, nil
}
// GetDataFromPayload returns data,length from payload, returns err if failed
// Return:
//
// `interface{}`: all types.
// `int`: dim, only meaningful to FLOAT/BINARY VECTOR type.
// `error`: error.
func (r *PayloadReader) GetDataFromPayload() (interface{}, int, error) {
switch r.colType {
case schemapb.DataType_Bool:
val, err := r.GetBoolFromPayload()
return val, 0, err
case schemapb.DataType_Int8:
val, err := r.GetInt8FromPayload()
return val, 0, err
case schemapb.DataType_Int16:
val, err := r.GetInt16FromPayload()
return val, 0, err
case schemapb.DataType_Int32:
val, err := r.GetInt32FromPayload()
return val, 0, err
case schemapb.DataType_Int64:
val, err := r.GetInt64FromPayload()
return val, 0, err
case schemapb.DataType_Float:
val, err := r.GetFloatFromPayload()
return val, 0, err
case schemapb.DataType_Double:
val, err := r.GetDoubleFromPayload()
return val, 0, err
case schemapb.DataType_BinaryVector:
return r.GetBinaryVectorFromPayload()
case schemapb.DataType_FloatVector:
return r.GetFloatVectorFromPayload()
case schemapb.DataType_Float16Vector:
return r.GetFloat16VectorFromPayload()
case schemapb.DataType_BFloat16Vector:
return r.GetBFloat16VectorFromPayload()
case schemapb.DataType_SparseFloatVector:
return r.GetSparseFloatVectorFromPayload()
case schemapb.DataType_String, schemapb.DataType_VarChar:
val, err := r.GetStringFromPayload()
return val, 0, err
case schemapb.DataType_Array:
val, err := r.GetArrayFromPayload()
return val, 0, err
case schemapb.DataType_JSON:
val, err := r.GetJSONFromPayload()
return val, 0, err
default:
return nil, 0, errors.New("unknown type")
}
}
// ReleasePayloadReader release payload reader.
func (r *PayloadReader) ReleasePayloadReader() error {
return r.Close()
}
// GetBoolFromPayload returns bool slice from payload.
func (r *PayloadReader) GetBoolFromPayload() ([]bool, error) {
if r.colType != schemapb.DataType_Bool {
return nil, fmt.Errorf("failed to get bool from datatype %v", r.colType.String())
}
values := make([]bool, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[bool, *file.BooleanColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
return values, nil
}
// GetByteFromPayload returns byte slice from payload
func (r *PayloadReader) GetByteFromPayload() ([]byte, error) {
if r.colType != schemapb.DataType_Int8 {
return nil, fmt.Errorf("failed to get byte from datatype %v", r.colType.String())
}
values := make([]int32, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]byte, r.numRows)
for i := int64(0); i < r.numRows; i++ {
ret[i] = byte(values[i])
}
return ret, nil
}
// GetInt8FromPayload returns int8 slice from payload
func (r *PayloadReader) GetInt8FromPayload() ([]int8, error) {
if r.colType != schemapb.DataType_Int8 {
return nil, fmt.Errorf("failed to get int8 from datatype %v", r.colType.String())
}
values := make([]int32, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]int8, r.numRows)
for i := int64(0); i < r.numRows; i++ {
ret[i] = int8(values[i])
}
return ret, nil
}
func (r *PayloadReader) GetInt16FromPayload() ([]int16, error) {
if r.colType != schemapb.DataType_Int16 {
return nil, fmt.Errorf("failed to get int16 from datatype %v", r.colType.String())
}
values := make([]int32, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]int16, r.numRows)
for i := int64(0); i < r.numRows; i++ {
ret[i] = int16(values[i])
}
return ret, nil
}
func (r *PayloadReader) GetInt32FromPayload() ([]int32, error) {
if r.colType != schemapb.DataType_Int32 {
return nil, fmt.Errorf("failed to get int32 from datatype %v", r.colType.String())
}
values := make([]int32, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
return values, nil
}
func (r *PayloadReader) GetInt64FromPayload() ([]int64, error) {
if r.colType != schemapb.DataType_Int64 {
return nil, fmt.Errorf("failed to get int64 from datatype %v", r.colType.String())
}
values := make([]int64, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[int64, *file.Int64ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
return values, nil
}
func (r *PayloadReader) GetFloatFromPayload() ([]float32, error) {
if r.colType != schemapb.DataType_Float {
return nil, fmt.Errorf("failed to get float32 from datatype %v", r.colType.String())
}
values := make([]float32, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[float32, *file.Float32ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
return values, nil
}
func (r *PayloadReader) GetDoubleFromPayload() ([]float64, error) {
if r.colType != schemapb.DataType_Double {
return nil, fmt.Errorf("failed to get float32 from datatype %v", r.colType.String())
}
values := make([]float64, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[float64, *file.Float64ColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
return values, nil
}
func (r *PayloadReader) GetStringFromPayload() ([]string, error) {
if r.colType != schemapb.DataType_String && r.colType != schemapb.DataType_VarChar {
return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
}
return readByteAndConvert(r, func(bytes parquet.ByteArray) string {
return bytes.String()
})
}
func (r *PayloadReader) GetByteArrayDataSet() (*DataSet[parquet.ByteArray, *file.ByteArrayColumnChunkReader], error) {
if r.colType != schemapb.DataType_String && r.colType != schemapb.DataType_VarChar {
return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
}
return NewDataSet[parquet.ByteArray, *file.ByteArrayColumnChunkReader](r.reader, 0, r.numRows), nil
}
func (r *PayloadReader) GetArrowRecordReader() (pqarrow.RecordReader, error) {
arrowReader, err := pqarrow.NewFileReader(r.reader, pqarrow.ArrowReadProperties{BatchSize: 1024}, memory.DefaultAllocator)
if err != nil {
return nil, err
}
rr, err := arrowReader.GetRecordReader(context.Background(), nil, nil)
if err != nil {
return nil, err
}
return rr, nil
}
func (r *PayloadReader) GetArrayFromPayload() ([]*schemapb.ScalarField, error) {
if r.colType != schemapb.DataType_Array {
return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
}
return readByteAndConvert(r, func(bytes parquet.ByteArray) *schemapb.ScalarField {
v := &schemapb.ScalarField{}
proto.Unmarshal(bytes, v)
return v
})
}
func (r *PayloadReader) GetJSONFromPayload() ([][]byte, error) {
if r.colType != schemapb.DataType_JSON {
return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
}
return readByteAndConvert(r, func(bytes parquet.ByteArray) []byte {
return bytes
})
}
func readByteAndConvert[T any](r *PayloadReader, convert func(parquet.ByteArray) T) ([]T, error) {
values := make([]parquet.ByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.ByteArray, *file.ByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, err
}
if valuesRead != r.numRows {
return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]T, r.numRows)
for i := 0; i < int(r.numRows); i++ {
ret[i] = convert(values[i])
}
return ret, nil
}
// GetBinaryVectorFromPayload returns vector, dimension, error
func (r *PayloadReader) GetBinaryVectorFromPayload() ([]byte, int, error) {
if r.colType != schemapb.DataType_BinaryVector {
return nil, -1, fmt.Errorf("failed to get binary vector from datatype %v", r.colType.String())
}
col, err := r.reader.RowGroup(0).Column(0)
if err != nil {
return nil, -1, err
}
dim := col.Descriptor().TypeLength()
values := make([]parquet.FixedLenByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, -1, err
}
if valuesRead != r.numRows {
return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]byte, int64(dim)*r.numRows)
for i := 0; i < int(r.numRows); i++ {
copy(ret[i*dim:(i+1)*dim], values[i])
}
return ret, dim * 8, nil
}
// GetFloat16VectorFromPayload returns vector, dimension, error
func (r *PayloadReader) GetFloat16VectorFromPayload() ([]byte, int, error) {
if r.colType != schemapb.DataType_Float16Vector {
return nil, -1, fmt.Errorf("failed to get float vector from datatype %v", r.colType.String())
}
col, err := r.reader.RowGroup(0).Column(0)
if err != nil {
return nil, -1, err
}
dim := col.Descriptor().TypeLength() / 2
values := make([]parquet.FixedLenByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, -1, err
}
if valuesRead != r.numRows {
return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]byte, int64(dim*2)*r.numRows)
for i := 0; i < int(r.numRows); i++ {
copy(ret[i*dim*2:(i+1)*dim*2], values[i])
}
return ret, dim, nil
}
// GetBFloat16VectorFromPayload returns vector, dimension, error
func (r *PayloadReader) GetBFloat16VectorFromPayload() ([]byte, int, error) {
if r.colType != schemapb.DataType_BFloat16Vector {
return nil, -1, fmt.Errorf("failed to get float vector from datatype %v", r.colType.String())
}
col, err := r.reader.RowGroup(0).Column(0)
if err != nil {
return nil, -1, err
}
dim := col.Descriptor().TypeLength() / 2
values := make([]parquet.FixedLenByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, -1, err
}
if valuesRead != r.numRows {
return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]byte, int64(dim*2)*r.numRows)
for i := 0; i < int(r.numRows); i++ {
copy(ret[i*dim*2:(i+1)*dim*2], values[i])
}
return ret, dim, nil
}
// GetFloatVectorFromPayload returns vector, dimension, error
func (r *PayloadReader) GetFloatVectorFromPayload() ([]float32, int, error) {
if r.colType != schemapb.DataType_FloatVector {
return nil, -1, fmt.Errorf("failed to get float vector from datatype %v", r.colType.String())
}
col, err := r.reader.RowGroup(0).Column(0)
if err != nil {
return nil, -1, err
}
dim := col.Descriptor().TypeLength() / 4
values := make([]parquet.FixedLenByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, -1, err
}
if valuesRead != r.numRows {
return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
}
ret := make([]float32, int64(dim)*r.numRows)
for i := 0; i < int(r.numRows); i++ {
copy(arrow.Float32Traits.CastToBytes(ret[i*dim:(i+1)*dim]), values[i])
}
return ret, dim, nil
}
func (r *PayloadReader) GetSparseFloatVectorFromPayload() (*SparseFloatVectorFieldData, int, error) {
if !typeutil.IsSparseFloatVectorType(r.colType) {
return nil, -1, fmt.Errorf("failed to get sparse float vector from datatype %v", r.colType.String())
}
values := make([]parquet.ByteArray, r.numRows)
valuesRead, err := ReadDataFromAllRowGroups[parquet.ByteArray, *file.ByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
if err != nil {
return nil, -1, err
}
if valuesRead != r.numRows {
return nil, -1, fmt.Errorf("expect %d binary, but got = %d", r.numRows, valuesRead)
}
fieldData := &SparseFloatVectorFieldData{}
for _, value := range values {
if len(value)%8 != 0 {
return nil, -1, fmt.Errorf("invalid bytesData length")
}
fieldData.Contents = append(fieldData.Contents, value)
rowDim := typeutil.SparseFloatRowDim(value)
if rowDim > fieldData.Dim {
fieldData.Dim = rowDim
}
}
return fieldData, int(fieldData.Dim), nil
}
func (r *PayloadReader) GetPayloadLengthFromReader() (int, error) {
return int(r.numRows), nil
}
// Close closes the payload reader
func (r *PayloadReader) Close() error {
return r.reader.Close()
}
// ReadDataFromAllRowGroups iterates all row groups of file.Reader, and convert column to E.
// then calls ReadBatch with provided parameters.
func ReadDataFromAllRowGroups[T any, E interface {
ReadBatch(int64, []T, []int16, []int16) (int64, int, error)
}](reader *file.Reader, values []T, columnIdx int, numRows int64) (int64, error) {
var offset int64
for i := 0; i < reader.NumRowGroups(); i++ {
if columnIdx >= reader.RowGroup(i).NumColumns() {
return -1, fmt.Errorf("try to fetch %d-th column of reader but row group has only %d column(s)", columnIdx, reader.RowGroup(i).NumColumns())
}
column, err := reader.RowGroup(i).Column(columnIdx)
if err != nil {
return -1, err
}
cReader, ok := column.(E)
if !ok {
return -1, fmt.Errorf("expect type %T, but got %T", *new(E), column)
}
_, valuesRead, err := cReader.ReadBatch(numRows, values[offset:], nil, nil)
if err != nil {
return -1, err
}
offset += int64(valuesRead)
}
return offset, nil
}
type DataSet[T any, E interface {
ReadBatch(int64, []T, []int16, []int16) (int64, int, error)
}] struct {
reader *file.Reader
cReader E
cnt, numRows int64
groupID, columnIdx int
}
func NewDataSet[T any, E interface {
ReadBatch(int64, []T, []int16, []int16) (int64, int, error)
}](reader *file.Reader, columnIdx int, numRows int64) *DataSet[T, E] {
return &DataSet[T, E]{
reader: reader,
columnIdx: columnIdx,
numRows: numRows,
}
}
func (s *DataSet[T, E]) nextGroup() error {
s.cnt = 0
column, err := s.reader.RowGroup(s.groupID).Column(s.columnIdx)
if err != nil {
return err
}
cReader, ok := column.(E)
if !ok {
return fmt.Errorf("expect type %T, but got %T", *new(E), column)
}
s.groupID++
s.cReader = cReader
return nil
}
func (s *DataSet[T, E]) HasNext() bool {
if s.groupID > s.reader.NumRowGroups() || (s.groupID == s.reader.NumRowGroups() && s.cnt >= s.numRows) || s.numRows == 0 {
return false
}
return true
}
func (s *DataSet[T, E]) NextBatch(batch int64) ([]T, error) {
if s.groupID > s.reader.NumRowGroups() || (s.groupID == s.reader.NumRowGroups() && s.cnt >= s.numRows) || s.numRows == 0 {
return nil, fmt.Errorf("has no more data")
}
if s.groupID == 0 || s.cnt >= s.numRows {
err := s.nextGroup()
if err != nil {
return nil, err
}
}
batch = Min(batch, s.numRows-s.cnt)
result := make([]T, batch)
_, _, err := s.cReader.ReadBatch(batch, result, nil, nil)
if err != nil {
return nil, err
}
s.cnt += batch
return result, nil
}