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[core][branch] Add branches system table (apache#2759)
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paimon-core/src/main/java/org/apache/paimon/branch/TableBranch.java
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|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
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| package org.apache.paimon.branch; | ||
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| /** {@link TableBranch} has branch relevant information for table. */ | ||
| public class TableBranch { | ||
| private final String branchName; | ||
| private final String createdFromTag; | ||
| private final Long createdFromSnapshot; | ||
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| private final long createTime; | ||
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| public TableBranch( | ||
| String branchName, String createdFromTag, Long createdFromSnapshot, long createTime) { | ||
| this.branchName = branchName; | ||
| this.createdFromTag = createdFromTag; | ||
| this.createdFromSnapshot = createdFromSnapshot; | ||
| this.createTime = createTime; | ||
| } | ||
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| public String getBranchName() { | ||
| return branchName; | ||
| } | ||
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| public String getCreatedFromTag() { | ||
| return createdFromTag; | ||
| } | ||
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| public Long getCreatedFromSnapshot() { | ||
| return createdFromSnapshot; | ||
| } | ||
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| public long getCreateTime() { | ||
| return createTime; | ||
| } | ||
| } |
216 changes: 216 additions & 0 deletions
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paimon-core/src/main/java/org/apache/paimon/table/system/BranchesTable.java
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| @@ -0,0 +1,216 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
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| package org.apache.paimon.table.system; | ||
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| import org.apache.paimon.branch.TableBranch; | ||
| import org.apache.paimon.data.BinaryString; | ||
| import org.apache.paimon.data.GenericRow; | ||
| import org.apache.paimon.data.InternalRow; | ||
| import org.apache.paimon.data.Timestamp; | ||
| import org.apache.paimon.disk.IOManager; | ||
| import org.apache.paimon.fs.FileIO; | ||
| import org.apache.paimon.fs.Path; | ||
| import org.apache.paimon.predicate.Predicate; | ||
| import org.apache.paimon.reader.RecordReader; | ||
| import org.apache.paimon.table.FileStoreTable; | ||
| import org.apache.paimon.table.FileStoreTableFactory; | ||
| import org.apache.paimon.table.ReadonlyTable; | ||
| import org.apache.paimon.table.Table; | ||
| import org.apache.paimon.table.source.InnerTableRead; | ||
| import org.apache.paimon.table.source.InnerTableScan; | ||
| import org.apache.paimon.table.source.ReadOnceTableScan; | ||
| import org.apache.paimon.table.source.Split; | ||
| import org.apache.paimon.table.source.TableRead; | ||
| import org.apache.paimon.types.BigIntType; | ||
| import org.apache.paimon.types.DataField; | ||
| import org.apache.paimon.types.RowType; | ||
| import org.apache.paimon.types.TimestampType; | ||
| import org.apache.paimon.utils.DateTimeUtils; | ||
| import org.apache.paimon.utils.IteratorRecordReader; | ||
| import org.apache.paimon.utils.ProjectedRow; | ||
| import org.apache.paimon.utils.SerializationUtils; | ||
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| import org.apache.paimon.shade.guava30.com.google.common.collect.Iterators; | ||
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| import java.util.Arrays; | ||
| import java.util.Collections; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Objects; | ||
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| import static org.apache.paimon.catalog.Catalog.SYSTEM_TABLE_SPLITTER; | ||
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| /** A {@link Table} for showing branches of table. */ | ||
| public class BranchesTable implements ReadonlyTable { | ||
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| private static final long serialVersionUID = 1L; | ||
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| public static final String BRANCHES = "branches"; | ||
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| public static final RowType TABLE_TYPE = | ||
| new RowType( | ||
| Arrays.asList( | ||
| new DataField( | ||
| 0, "branch_name", SerializationUtils.newStringType(false)), | ||
| new DataField( | ||
| 1, "created_from_tag", SerializationUtils.newStringType(false)), | ||
| new DataField(2, "created_from_snapshot", new BigIntType(false)), | ||
| new DataField(3, "create_time", new TimestampType(false, 3)))); | ||
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| private final FileIO fileIO; | ||
| private final Path location; | ||
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| public BranchesTable(FileIO fileIO, Path location) { | ||
| this.fileIO = fileIO; | ||
| this.location = location; | ||
| } | ||
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| @Override | ||
| public String name() { | ||
| return location.getName() + SYSTEM_TABLE_SPLITTER + BRANCHES; | ||
| } | ||
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| @Override | ||
| public RowType rowType() { | ||
| return TABLE_TYPE; | ||
| } | ||
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| @Override | ||
| public List<String> primaryKeys() { | ||
| return Arrays.asList("branch_name", "tag_name"); | ||
| } | ||
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| @Override | ||
| public InnerTableScan newScan() { | ||
| return new BranchesScan(); | ||
| } | ||
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| @Override | ||
| public InnerTableRead newRead() { | ||
| return new BranchesRead(fileIO); | ||
| } | ||
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| @Override | ||
| public Table copy(Map<String, String> dynamicOptions) { | ||
| return new BranchesTable(fileIO, location); | ||
| } | ||
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| private class BranchesScan extends ReadOnceTableScan { | ||
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| @Override | ||
| public InnerTableScan withFilter(Predicate predicate) { | ||
| // TODO | ||
| return this; | ||
| } | ||
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| @Override | ||
| public Plan innerPlan() { | ||
| return () -> Collections.singletonList(new BranchesSplit(fileIO, location)); | ||
| } | ||
| } | ||
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| private static class BranchesSplit implements Split { | ||
| private static final long serialVersionUID = 1L; | ||
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| private final FileIO fileIO; | ||
| private final Path location; | ||
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| private BranchesSplit(FileIO fileIO, Path location) { | ||
| this.fileIO = fileIO; | ||
| this.location = location; | ||
| } | ||
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| @Override | ||
| public long rowCount() { | ||
| FileStoreTable table = FileStoreTableFactory.create(fileIO, location); | ||
| return table.branchManager().branchCount(); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| BranchesSplit that = (BranchesSplit) o; | ||
| return Objects.equals(location, that.location); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(location); | ||
| } | ||
| } | ||
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| private static class BranchesRead implements InnerTableRead { | ||
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| private final FileIO fileIO; | ||
| private int[][] projection; | ||
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| public BranchesRead(FileIO fileIO) { | ||
| this.fileIO = fileIO; | ||
| } | ||
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| @Override | ||
| public InnerTableRead withFilter(Predicate predicate) { | ||
| // TODO | ||
| return this; | ||
| } | ||
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| @Override | ||
| public InnerTableRead withProjection(int[][] projection) { | ||
| this.projection = projection; | ||
| return this; | ||
| } | ||
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| @Override | ||
| public TableRead withIOManager(IOManager ioManager) { | ||
| return this; | ||
| } | ||
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| @Override | ||
| public RecordReader<InternalRow> createReader(Split split) { | ||
| if (!(split instanceof BranchesSplit)) { | ||
| throw new IllegalArgumentException("Unsupported split: " + split.getClass()); | ||
| } | ||
| Path location = ((BranchesSplit) split).location; | ||
| FileStoreTable table = FileStoreTableFactory.create(fileIO, location); | ||
| List<TableBranch> branches = table.branchManager().branches(); | ||
| Iterator<InternalRow> rows = Iterators.transform(branches.iterator(), this::toRow); | ||
| if (projection != null) { | ||
| rows = | ||
| Iterators.transform( | ||
| rows, row -> ProjectedRow.from(projection).replaceRow(row)); | ||
| } | ||
| return new IteratorRecordReader<>(rows); | ||
| } | ||
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| private InternalRow toRow(TableBranch branch) { | ||
| return GenericRow.of( | ||
| BinaryString.fromString(branch.getBranchName()), | ||
| BinaryString.fromString(branch.getCreatedFromTag()), | ||
| branch.getCreatedFromSnapshot(), | ||
| Timestamp.fromLocalDateTime( | ||
| DateTimeUtils.toLocalDateTime(branch.getCreateTime()))); | ||
| } | ||
| } | ||
| } |
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