[core] Introduce binlog system table to pack the UB and UA #4520
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * 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.reader; | ||
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| import org.apache.paimon.data.InternalRow; | ||
| import org.apache.paimon.data.serializer.InternalRowSerializer; | ||
| import org.apache.paimon.types.RowKind; | ||
| import org.apache.paimon.types.RowType; | ||
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| import javax.annotation.Nullable; | ||
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| import java.io.IOException; | ||
| import java.util.function.BiFunction; | ||
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| /** The reader which will pack the update before and update after message together. */ | ||
| public class PackChangelogReader implements RecordReader<InternalRow> { | ||
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| private final RecordReader<InternalRow> reader; | ||
| private final BiFunction<InternalRow, InternalRow, InternalRow> function; | ||
| private final InternalRowSerializer serializer; | ||
| private boolean initialized = false; | ||
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| public PackChangelogReader( | ||
| RecordReader<InternalRow> reader, | ||
| BiFunction<InternalRow, InternalRow, InternalRow> function, | ||
| RowType rowType) { | ||
| this.reader = reader; | ||
| this.function = function; | ||
| this.serializer = new InternalRowSerializer(rowType); | ||
| } | ||
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| @Nullable | ||
| @Override | ||
| public RecordIterator<InternalRow> readBatch() throws IOException { | ||
| if (!initialized) { | ||
| initialized = true; | ||
| return new InternRecordIterator(reader, function, serializer); | ||
| } | ||
| return null; | ||
| } | ||
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| @Override | ||
| public void close() throws IOException { | ||
| reader.close(); | ||
| } | ||
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| private static class InternRecordIterator implements RecordIterator<InternalRow> { | ||
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| private RecordIterator<InternalRow> currentBatch; | ||
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| private final BiFunction<InternalRow, InternalRow, InternalRow> function; | ||
| private final RecordReader<InternalRow> reader; | ||
| private final InternalRowSerializer serializer; | ||
| private boolean endOfData; | ||
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| public InternRecordIterator( | ||
| RecordReader<InternalRow> reader, | ||
| BiFunction<InternalRow, InternalRow, InternalRow> function, | ||
| InternalRowSerializer serializer) { | ||
| this.reader = reader; | ||
| this.function = function; | ||
| this.serializer = serializer; | ||
| this.endOfData = false; | ||
| } | ||
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| @Nullable | ||
| @Override | ||
| public InternalRow next() throws IOException { | ||
| InternalRow row1 = nextRow(); | ||
| if (row1 == null) { | ||
| return null; | ||
| } | ||
| InternalRow row2 = null; | ||
| if (row1.getRowKind() == RowKind.UPDATE_BEFORE) { | ||
| row1 = serializer.copy(row1); | ||
| row2 = nextRow(); | ||
| } | ||
| return function.apply(row1, row2); | ||
| } | ||
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| @Nullable | ||
| private InternalRow nextRow() throws IOException { | ||
| InternalRow row = null; | ||
| while (!endOfData && row == null) { | ||
| RecordIterator<InternalRow> batch = nextBatch(); | ||
| if (batch == null) { | ||
| endOfData = true; | ||
| return null; | ||
| } | ||
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| row = batch.next(); | ||
| if (row == null) { | ||
| releaseBatch(); | ||
| } | ||
| } | ||
| return row; | ||
| } | ||
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| @Nullable | ||
| private RecordIterator<InternalRow> nextBatch() throws IOException { | ||
| if (currentBatch == null) { | ||
| currentBatch = reader.readBatch(); | ||
| } | ||
| return currentBatch; | ||
| } | ||
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| @Override | ||
| public void releaseBatch() { | ||
| if (currentBatch != null) { | ||
| currentBatch.releaseBatch(); | ||
| currentBatch = null; | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
||
| package org.apache.paimon.table.system; | ||
|
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| import org.apache.paimon.data.GenericArray; | ||
| import org.apache.paimon.data.GenericRow; | ||
| import org.apache.paimon.data.InternalRow; | ||
| import org.apache.paimon.reader.PackChangelogReader; | ||
| import org.apache.paimon.reader.RecordReader; | ||
| import org.apache.paimon.table.FileStoreTable; | ||
| import org.apache.paimon.table.SpecialFields; | ||
| import org.apache.paimon.table.Table; | ||
| import org.apache.paimon.table.source.DataSplit; | ||
| import org.apache.paimon.table.source.InnerTableRead; | ||
| import org.apache.paimon.table.source.Split; | ||
| import org.apache.paimon.types.ArrayType; | ||
| import org.apache.paimon.types.DataField; | ||
| import org.apache.paimon.types.RowType; | ||
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| import javax.annotation.Nullable; | ||
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| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| import static org.apache.paimon.catalog.Catalog.SYSTEM_TABLE_SPLITTER; | ||
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| /** | ||
| * A {@link Table} for reading binlog of table. The binlog format is as below. | ||
| * | ||
| * <p>INSERT: [+I, [co1, null], [col2, null]] | ||
| * | ||
| * <p>UPDATE: [+U, [co1_ub, col1_ua], [col2_ub, col2_ua]] | ||
| * | ||
| * <p>DELETE: [-D, [co1, null], [col2, null]] | ||
| */ | ||
| public class BinlogTable extends AuditLogTable { | ||
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| public static final String BINLOG = "binlog"; | ||
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| private final FileStoreTable wrapped; | ||
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| public BinlogTable(FileStoreTable wrapped) { | ||
| super(wrapped); | ||
| this.wrapped = wrapped; | ||
| } | ||
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| @Override | ||
| public String name() { | ||
| return wrapped.name() + SYSTEM_TABLE_SPLITTER + BINLOG; | ||
| } | ||
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| @Override | ||
| public RowType rowType() { | ||
| List<DataField> fields = new ArrayList<>(); | ||
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| fields.add(SpecialFields.ROW_KIND); | ||
| for (DataField field : wrapped.rowType().getFields()) { | ||
| DataField newField = | ||
| new DataField( | ||
| field.id(), | ||
| field.name(), | ||
| new ArrayType(field.type().nullable()), // convert to nullable | ||
| field.description()); | ||
| fields.add(newField); | ||
| } | ||
| return new RowType(fields); | ||
| } | ||
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| @Override | ||
| public InnerTableRead newRead() { | ||
| return new BinlogRead(wrapped.newRead()); | ||
| } | ||
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| @Override | ||
| public Table copy(Map<String, String> dynamicOptions) { | ||
| return new BinlogTable(wrapped.copy(dynamicOptions)); | ||
| } | ||
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| private class BinlogRead extends AuditLogRead { | ||
|
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| private BinlogRead(InnerTableRead dataRead) { | ||
| super(dataRead); | ||
| } | ||
|
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| @Override | ||
| public RecordReader<InternalRow> createReader(Split split) throws IOException { | ||
| DataSplit dataSplit = (DataSplit) split; | ||
| if (dataSplit.isStreaming()) { | ||
| return new PackChangelogReader( | ||
| dataRead.createReader(split), | ||
| (row1, row2) -> | ||
| new AuditLogRow( | ||
| readProjection, | ||
| convertToArray( | ||
| row1, row2, wrapped.rowType().fieldGetters())), | ||
| wrapped.rowType()); | ||
| } else { | ||
| return dataRead.createReader(split) | ||
| .transform( | ||
| (row) -> | ||
| new AuditLogRow( | ||
| readProjection, | ||
| convertToArray( | ||
| row, | ||
| null, | ||
| wrapped.rowType().fieldGetters()))); | ||
| } | ||
| } | ||
|
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| private InternalRow convertToArray( | ||
| InternalRow row1, | ||
| @Nullable InternalRow row2, | ||
| InternalRow.FieldGetter[] fieldGetters) { | ||
| GenericRow row = new GenericRow(row1.getFieldCount()); | ||
| for (int i = 0; i < row1.getFieldCount(); i++) { | ||
| Object o1 = fieldGetters[i].getFieldOrNull(row1); | ||
| Object o2; | ||
| if (row2 != null) { | ||
| o2 = fieldGetters[i].getFieldOrNull(row2); | ||
| row.setField(i, new GenericArray(new Object[] {o1, o2})); | ||
| } else { | ||
| row.setField(i, new GenericArray(new Object[] {o1})); | ||
| } | ||
| } | ||
| // If no row2 provided, then follow the row1 kind. | ||
| if (row2 == null) { | ||
| row.setRowKind(row1.getRowKind()); | ||
| } else { | ||
| row.setRowKind(row2.getRowKind()); | ||
| } | ||
| return row; | ||
| } | ||
| } | ||
| } | ||
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Why copy instead of using row1 directly?
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The underlay's row fetched from the
nextRowcould be reused.