mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-05 05:18:52 +08:00
379 lines
11 KiB
Go
379 lines
11 KiB
Go
package storage
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import (
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"bytes"
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"fmt"
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"github.com/cockroachdb/errors"
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"github.com/golang/protobuf/proto"
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"github.com/apache/arrow/go/v8/arrow"
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"github.com/apache/arrow/go/v8/parquet"
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"github.com/apache/arrow/go/v8/parquet/file"
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"github.com/milvus-io/milvus-proto/go-api/schemapb"
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)
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// PayloadReader reads data from payload
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type PayloadReader struct {
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reader *file.Reader
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colType schemapb.DataType
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numRows int64
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}
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var _ PayloadReaderInterface = (*PayloadReader)(nil)
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func NewPayloadReader(colType schemapb.DataType, buf []byte) (*PayloadReader, error) {
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if len(buf) == 0 {
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return nil, errors.New("create Payload reader failed, buffer is empty")
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}
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parquetReader, err := file.NewParquetReader(bytes.NewReader(buf))
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if err != nil {
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return nil, err
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}
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return &PayloadReader{reader: parquetReader, colType: colType, numRows: parquetReader.NumRows()}, nil
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}
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// GetDataFromPayload returns data,length from payload, returns err if failed
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// Return:
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//
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// `interface{}`: all types.
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// `int`: dim, only meaningful to FLOAT/BINARY VECTOR type.
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// `error`: error.
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func (r *PayloadReader) GetDataFromPayload() (interface{}, int, error) {
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switch r.colType {
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case schemapb.DataType_Bool:
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val, err := r.GetBoolFromPayload()
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return val, 0, err
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case schemapb.DataType_Int8:
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val, err := r.GetInt8FromPayload()
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return val, 0, err
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case schemapb.DataType_Int16:
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val, err := r.GetInt16FromPayload()
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return val, 0, err
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case schemapb.DataType_Int32:
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val, err := r.GetInt32FromPayload()
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return val, 0, err
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case schemapb.DataType_Int64:
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val, err := r.GetInt64FromPayload()
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return val, 0, err
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case schemapb.DataType_Float:
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val, err := r.GetFloatFromPayload()
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return val, 0, err
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case schemapb.DataType_Double:
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val, err := r.GetDoubleFromPayload()
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return val, 0, err
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case schemapb.DataType_BinaryVector:
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return r.GetBinaryVectorFromPayload()
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case schemapb.DataType_FloatVector:
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return r.GetFloatVectorFromPayload()
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case schemapb.DataType_String, schemapb.DataType_VarChar:
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val, err := r.GetStringFromPayload()
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return val, 0, err
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case schemapb.DataType_Array:
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val, err := r.GetArrayFromPayload()
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return val, 0, err
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case schemapb.DataType_JSON:
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val, err := r.GetJSONFromPayload()
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return val, 0, err
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default:
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return nil, 0, errors.New("unknown type")
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}
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}
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// ReleasePayloadReader release payload reader.
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func (r *PayloadReader) ReleasePayloadReader() error {
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return r.Close()
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}
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// GetBoolFromPayload returns bool slice from payload.
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func (r *PayloadReader) GetBoolFromPayload() ([]bool, error) {
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if r.colType != schemapb.DataType_Bool {
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return nil, fmt.Errorf("failed to get bool from datatype %v", r.colType.String())
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}
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values := make([]bool, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[bool, *file.BooleanColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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return values, nil
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}
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// GetByteFromPayload returns byte slice from payload
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func (r *PayloadReader) GetByteFromPayload() ([]byte, error) {
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if r.colType != schemapb.DataType_Int8 {
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return nil, fmt.Errorf("failed to get byte from datatype %v", r.colType.String())
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}
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values := make([]int32, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]byte, r.numRows)
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for i := int64(0); i < r.numRows; i++ {
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ret[i] = byte(values[i])
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}
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return ret, nil
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}
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// GetInt8FromPayload returns int8 slice from payload
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func (r *PayloadReader) GetInt8FromPayload() ([]int8, error) {
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if r.colType != schemapb.DataType_Int8 {
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return nil, fmt.Errorf("failed to get int8 from datatype %v", r.colType.String())
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}
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values := make([]int32, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]int8, r.numRows)
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for i := int64(0); i < r.numRows; i++ {
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ret[i] = int8(values[i])
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}
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return ret, nil
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}
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func (r *PayloadReader) GetInt16FromPayload() ([]int16, error) {
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if r.colType != schemapb.DataType_Int16 {
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return nil, fmt.Errorf("failed to get int16 from datatype %v", r.colType.String())
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}
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values := make([]int32, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]int16, r.numRows)
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for i := int64(0); i < r.numRows; i++ {
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ret[i] = int16(values[i])
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}
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return ret, nil
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}
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func (r *PayloadReader) GetInt32FromPayload() ([]int32, error) {
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if r.colType != schemapb.DataType_Int32 {
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return nil, fmt.Errorf("failed to get int32 from datatype %v", r.colType.String())
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}
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values := make([]int32, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[int32, *file.Int32ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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return values, nil
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}
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func (r *PayloadReader) GetInt64FromPayload() ([]int64, error) {
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if r.colType != schemapb.DataType_Int64 {
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return nil, fmt.Errorf("failed to get int64 from datatype %v", r.colType.String())
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}
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values := make([]int64, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[int64, *file.Int64ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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return values, nil
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}
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func (r *PayloadReader) GetFloatFromPayload() ([]float32, error) {
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if r.colType != schemapb.DataType_Float {
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return nil, fmt.Errorf("failed to get float32 from datatype %v", r.colType.String())
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}
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values := make([]float32, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[float32, *file.Float32ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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return values, nil
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}
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func (r *PayloadReader) GetDoubleFromPayload() ([]float64, error) {
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if r.colType != schemapb.DataType_Double {
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return nil, fmt.Errorf("failed to get float32 from datatype %v", r.colType.String())
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}
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values := make([]float64, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[float64, *file.Float64ColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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return values, nil
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}
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func (r *PayloadReader) GetStringFromPayload() ([]string, error) {
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if r.colType != schemapb.DataType_String && r.colType != schemapb.DataType_VarChar {
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return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
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}
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return readByteAndConvert(r, func(bytes parquet.ByteArray) string {
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return bytes.String()
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})
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}
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func (r *PayloadReader) GetArrayFromPayload() ([]*schemapb.ScalarField, error) {
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if r.colType != schemapb.DataType_Array {
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return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
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}
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return readByteAndConvert(r, func(bytes parquet.ByteArray) *schemapb.ScalarField {
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v := &schemapb.ScalarField{}
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proto.Unmarshal(bytes, v)
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return v
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})
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}
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func (r *PayloadReader) GetJSONFromPayload() ([][]byte, error) {
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if r.colType != schemapb.DataType_JSON {
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return nil, fmt.Errorf("failed to get string from datatype %v", r.colType.String())
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}
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return readByteAndConvert(r, func(bytes parquet.ByteArray) []byte {
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return bytes
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})
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}
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func readByteAndConvert[T any](r *PayloadReader, convert func(parquet.ByteArray) T) ([]T, error) {
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values := make([]parquet.ByteArray, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[parquet.ByteArray, *file.ByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, err
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}
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if valuesRead != r.numRows {
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return nil, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]T, r.numRows)
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for i := 0; i < int(r.numRows); i++ {
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ret[i] = convert(values[i])
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}
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return ret, nil
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}
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// GetBinaryVectorFromPayload returns vector, dimension, error
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func (r *PayloadReader) GetBinaryVectorFromPayload() ([]byte, int, error) {
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if r.colType != schemapb.DataType_BinaryVector {
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return nil, -1, fmt.Errorf("failed to get binary vector from datatype %v", r.colType.String())
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}
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dim := r.reader.RowGroup(0).Column(0).Descriptor().TypeLength()
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values := make([]parquet.FixedLenByteArray, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, -1, err
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}
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if valuesRead != r.numRows {
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return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]byte, int64(dim)*r.numRows)
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for i := 0; i < int(r.numRows); i++ {
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copy(ret[i*dim:(i+1)*dim], values[i])
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}
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return ret, dim * 8, nil
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}
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// GetFloatVectorFromPayload returns vector, dimension, error
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func (r *PayloadReader) GetFloatVectorFromPayload() ([]float32, int, error) {
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if r.colType != schemapb.DataType_FloatVector {
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return nil, -1, fmt.Errorf("failed to get float vector from datatype %v", r.colType.String())
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}
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dim := r.reader.RowGroup(0).Column(0).Descriptor().TypeLength() / 4
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values := make([]parquet.FixedLenByteArray, r.numRows)
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valuesRead, err := ReadDataFromAllRowGroups[parquet.FixedLenByteArray, *file.FixedLenByteArrayColumnChunkReader](r.reader, values, 0, r.numRows)
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if err != nil {
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return nil, -1, err
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}
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if valuesRead != r.numRows {
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return nil, -1, fmt.Errorf("expect %d rows, but got valuesRead = %d", r.numRows, valuesRead)
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}
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ret := make([]float32, int64(dim)*r.numRows)
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for i := 0; i < int(r.numRows); i++ {
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copy(arrow.Float32Traits.CastToBytes(ret[i*dim:(i+1)*dim]), values[i])
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}
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return ret, dim, nil
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}
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func (r *PayloadReader) GetPayloadLengthFromReader() (int, error) {
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return int(r.numRows), nil
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}
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// Close closes the payload reader
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func (r *PayloadReader) Close() error {
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return r.reader.Close()
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}
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// ReadDataFromAllRowGroups iterates all row groups of file.Reader, and convert column to E.
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// then calls ReadBatch with provided parameters.
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func ReadDataFromAllRowGroups[T any, E interface {
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ReadBatch(int64, []T, []int16, []int16) (int64, int, error)
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}](reader *file.Reader, values []T, columnIdx int, numRows int64) (int64, error) {
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var offset int64
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for i := 0; i < reader.NumRowGroups(); i++ {
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if columnIdx >= reader.RowGroup(i).NumColumns() {
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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())
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}
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column := reader.RowGroup(i).Column(columnIdx)
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cReader, ok := column.(E)
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if !ok {
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return -1, fmt.Errorf("expect type %T, but got %T", *new(E), column)
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}
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_, valuesRead, err := cReader.ReadBatch(numRows, values[offset:], nil, nil)
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if err != nil {
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return -1, err
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}
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offset += int64(valuesRead)
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}
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return offset, nil
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}
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