org.dinky.shaded.paimon.table.TableUtils Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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
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package org.dinky.shaded.paimon.table;
import org.dinky.shaded.paimon.data.InternalRow;
import org.dinky.shaded.paimon.predicate.Predicate;
import org.dinky.shaded.paimon.predicate.PredicateFilter;
import org.dinky.shaded.paimon.reader.RecordReader;
import org.dinky.shaded.paimon.table.sink.BatchTableCommit;
import org.dinky.shaded.paimon.table.sink.BatchTableWrite;
import org.dinky.shaded.paimon.table.sink.BatchWriteBuilder;
import org.dinky.shaded.paimon.table.source.ReadBuilder;
import org.dinky.shaded.paimon.table.source.Split;
import org.dinky.shaded.paimon.types.RowKind;
import org.dinky.shaded.paimon.utils.CloseableIterator;
import java.util.List;
/** Utils for Table. TODO we can introduce LocalAction maybe? */
public class TableUtils {
/**
* Delete according to filters.
*
* NOTE: This method is only suitable for deletion of small amount of data.
*
* @return the number of deleted records
*/
public static long deleteWhere(Table table, List filters) {
ReadBuilder readBuilder = table.newReadBuilder().withFilter(filters);
BatchWriteBuilder writeBuilder = table.newBatchWriteBuilder();
List splits = readBuilder.newScan().plan().splits();
long hit = 0;
try (RecordReader reader = readBuilder.newRead().createReader(splits);
BatchTableWrite write = writeBuilder.newWrite();
BatchTableCommit commit = writeBuilder.newCommit()) {
CloseableIterator iterator = reader.toCloseableIterator();
PredicateFilter filter = new PredicateFilter(table.rowType(), filters);
while (iterator.hasNext()) {
InternalRow row = iterator.next();
if (filter.test(row)) {
hit++;
row.setRowKind(RowKind.DELETE);
write.write(row);
}
}
commit.commit(write.prepareCommit());
return hit;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}