wehub-resource-sync
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62 lines
1.9 KiB
Go
62 lines
1.9 KiB
Go
/*
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* # Licensed to the LF AI & Data foundation under one
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* # or more contributor license agreements. See the NOTICE file
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* # distributed with this work for additional information
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* # regarding copyright ownership. The ASF licenses this file
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* # to you under the Apache License, Version 2.0 (the
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* # "License"); you may not use this file except in compliance
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* # with the License. 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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*/
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package chain
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import "github.com/milvus-io/milvus/pkg/v3/util/merr"
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// PruneDataFrame returns a DataFrame containing keepNonSystem plus retained system columns.
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// If no column is dropped, the original DataFrame is returned unchanged.
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func PruneDataFrame(df *DataFrame, keepNonSystem ColumnSet, policy SystemColumnPolicy) (*DataFrame, error) {
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if df == nil {
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return nil, merr.WrapErrServiceInternal("dataframe is nil")
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}
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policy = normalizeSystemColumnPolicy(policy)
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colNames := df.ColumnNames()
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keepNames := make([]string, 0, len(colNames))
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dropped := false
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for _, name := range colNames {
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keep := keepNonSystem.Contains(name)
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if policy.KeepAllSystemColumns && IsFunctionChainSystemName(name) {
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keep = true
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}
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if keep {
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keepNames = append(keepNames, name)
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} else {
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dropped = true
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}
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}
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if !dropped {
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return df, nil
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}
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builder := NewDataFrameBuilder()
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defer builder.Release()
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builder.SetChunkSizes(df.chunkSizes)
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builder.CopyAllMetadata(df)
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for _, name := range keepNames {
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if err := builder.AddColumnFrom(df, name); err != nil {
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return nil, err
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}
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}
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return builder.Build(), nil
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}
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