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parquet/src/main/java/org/apache/iceberg/parquet/ParquetCombinedRowGroupFilter.java
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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. | ||
| */ | ||
| package org.apache.iceberg.parquet; | ||
|
|
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| import org.apache.iceberg.Schema; | ||
| import org.apache.iceberg.expressions.Binder; | ||
| import org.apache.iceberg.expressions.Expression; | ||
| import org.apache.iceberg.expressions.Expressions; | ||
| import org.apache.iceberg.types.Types; | ||
| import org.apache.parquet.hadoop.ParquetFileReader; | ||
| import org.apache.parquet.hadoop.metadata.BlockMetaData; | ||
| import org.apache.parquet.schema.MessageType; | ||
|
|
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| public class ParquetCombinedRowGroupFilter { | ||
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| private final Schema schema; | ||
| private final Expression expr; | ||
| private final boolean caseSensitive; | ||
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| public ParquetCombinedRowGroupFilter(Schema schema, Expression expr, boolean caseSensitive) { | ||
| this.schema = schema; | ||
| Types.StructType struct = schema.asStruct(); | ||
| if (Binder.isBound(expr)) { | ||
| this.expr = Expressions.rewriteNot(expr); | ||
| } else { | ||
| this.expr = Binder.bind(struct, Expressions.rewriteNot(expr), caseSensitive); | ||
| } | ||
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| this.caseSensitive = caseSensitive; | ||
| } | ||
|
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| /** | ||
| * Test whether the file may contain records that match the expression. | ||
| * | ||
| * @param fileSchema schema for the Parquet file | ||
| * @param rowGroup metadata for a row group | ||
| * @param reader file reader for the Parquet file | ||
| * @return false if the file cannot contain rows that match the expression, true otherwise. | ||
| */ | ||
| public boolean shouldRead( | ||
| MessageType fileSchema, BlockMetaData rowGroup, ParquetFileReader reader) { | ||
| return residualFor(fileSchema, rowGroup, reader) != Expressions.alwaysFalse(); | ||
| } | ||
|
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| public Expression residualFor( | ||
| MessageType fileSchema, BlockMetaData rowGroup, ParquetFileReader reader) { | ||
| ParquetMetricsRowGroupFilter metricFilter = | ||
| new ParquetMetricsRowGroupFilter(schema, expr, caseSensitive); | ||
| Expression metricResidual = metricFilter.residualFor(fileSchema, rowGroup); | ||
| if (metricResidual == Expressions.alwaysFalse() || metricResidual == Expressions.alwaysTrue()) { | ||
| return metricResidual; | ||
| } | ||
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| ParquetDictionaryRowGroupFilter dictFilter = | ||
| new ParquetDictionaryRowGroupFilter(schema, metricResidual, caseSensitive); | ||
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| Expression dictResidual = | ||
| dictFilter.residualFor(fileSchema, rowGroup, reader.getDictionaryReader(rowGroup)); | ||
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| if (dictResidual == Expressions.alwaysFalse() || dictResidual == Expressions.alwaysTrue()) { | ||
| return dictResidual; | ||
| } | ||
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| ParquetBloomRowGroupFilter bloomFilter = | ||
| new ParquetBloomRowGroupFilter(schema, dictResidual, caseSensitive); | ||
| return bloomFilter.residualFor(fileSchema, rowGroup, reader.getBloomFilterDataReader(rowGroup)); | ||
| } | ||
| } |
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