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c4ae9f4ece
related: https://github.com/milvus-io/milvus/issues/39173 Signed-off-by: shaoting-huang <shaoting.huang@zilliz.com>
36 lines
1.2 KiB
Go
36 lines
1.2 KiB
Go
// Copyright 2023 Zilliz
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package commonreader
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import (
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"github.com/apache/arrow/go/v12/arrow"
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"github.com/apache/arrow/go/v12/arrow/array"
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"github.com/milvus-io/milvus/internal/storagev2/common/utils"
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"github.com/milvus-io/milvus/internal/storagev2/storage/options"
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)
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type ProjectionReader struct {
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array.RecordReader
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reader array.RecordReader
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options *options.ReadOptions
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schema *arrow.Schema
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}
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func NewProjectionReader(reader array.RecordReader, options *options.ReadOptions, schema *arrow.Schema) array.RecordReader {
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projectionSchema := utils.ProjectSchema(schema, options.Columns)
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return &ProjectionReader{reader: reader, options: options, schema: projectionSchema}
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}
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