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file_writer.go
60 lines (50 loc) · 1.56 KB
/
file_writer.go
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// Copyright 2023 Zilliz
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package parquet
import (
"github.com/apache/arrow/go/v12/arrow"
"github.com/apache/arrow/go/v12/parquet"
"github.com/apache/arrow/go/v12/parquet/pqarrow"
"github.com/milvus-io/milvus-storage/go/io/format"
"github.com/milvus-io/milvus-storage/go/io/fs"
)
var _ format.Writer = (*FileWriter)(nil)
type FileWriter struct {
writer *pqarrow.FileWriter
count int64
}
func (f *FileWriter) Write(record arrow.Record) error {
if err := f.writer.Write(record); err != nil {
return err
}
f.count += record.NumRows()
return nil
}
func (f *FileWriter) Count() int64 {
return f.count
}
func (f *FileWriter) Close() error {
return f.writer.Close()
}
func NewFileWriter(schema *arrow.Schema, fs fs.Fs, filePath string) (*FileWriter, error) {
file, err := fs.OpenFile(filePath)
if err != nil {
return nil, err
}
w, err := pqarrow.NewFileWriter(schema, file, parquet.NewWriterProperties(), pqarrow.DefaultWriterProps())
if err != nil {
return nil, err
}
return &FileWriter{writer: w}, nil
}