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Scott Kuehn
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Aug 28, 2021
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58 changes: 58 additions & 0 deletions
58
src/main/java/com/google/cloud/solutions/datalineage/extractor/InsertStatementExtractor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package com.google.cloud.solutions.datalineage.extractor; | ||
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| import static com.google.cloud.solutions.datalineage.converter.ResolvedColumnToColumnEntityConverter.convertToColumnEntity; | ||
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| import com.google.cloud.solutions.datalineage.model.LineageMessages.ColumnEntity; | ||
| import com.google.cloud.solutions.datalineage.model.LineageMessages.ColumnLineage; | ||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import com.google.zetasql.resolvedast.ResolvedColumn; | ||
| import com.google.zetasql.resolvedast.ResolvedNodes; | ||
| import java.util.HashMap; | ||
| import java.util.stream.IntStream; | ||
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| public class InsertStatementExtractor extends ColumnLineageExtractor { | ||
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| public InsertStatementExtractor(ResolvedNodes.ResolvedStatement resolvedStatement) { | ||
| super(resolvedStatement); | ||
| } | ||
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| @Override | ||
| public String getSupportedColumnType() { | ||
| // TODO skuehn this PR determine how to support column types and the extractor instantiation | ||
| // optimizations | ||
| return null; | ||
| } | ||
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| @Override | ||
| public ImmutableMap<ColumnEntity, ColumnLineage> extract() { | ||
| HashMap<ColumnEntity, ColumnLineage> exprLineageMapBuilder = new HashMap<>(); | ||
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| resolvedStatement.accept( | ||
| new ResolvedNodes.Visitor() { | ||
| @Override | ||
| public void visit(ResolvedNodes.ResolvedInsertStmt insertStmt) { | ||
| if (!insertStmt.getQueryOutputColumnList().isEmpty()) { | ||
| // For inserts, BQ requires values to be added in the same order as the specified | ||
| // columns, and the number of values added must match the number of specified columns. | ||
| IntStream.range(0, insertStmt.getInsertColumnList().size()).forEach(columnIndex -> { | ||
| ColumnEntity outputColumn = | ||
| convertToColumnEntity(insertStmt.getInsertColumnList().get(columnIndex)); | ||
| ResolvedColumn sourceColumn = insertStmt.getQueryOutputColumnList() | ||
| .get(columnIndex); | ||
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| exprLineageMapBuilder.put( | ||
| outputColumn, | ||
| ColumnLineage.newBuilder() | ||
| .setTarget(outputColumn) | ||
| .addAllParents(ImmutableList.of(convertToColumnEntity(sourceColumn))) | ||
| .build()); | ||
| }); | ||
| } | ||
| super.visit(insertStmt); | ||
| } | ||
| }); | ||
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| return ImmutableMap.copyOf(exprLineageMapBuilder); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| /* | ||
| * Copyright 2020 Google LLC | ||
| * | ||
| * 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. | ||
| */ | ||
| -- | ||
| -- 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. | ||
|
|
||
| #standardSQL | ||
| INSERT | ||
| `project1.datasetA.TableA` | ||
| SELECT | ||
| colB, | ||
| colC | ||
| FROM | ||
| `project2.datasetB.TableB` |
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