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DRILL-649: Reading impala and avro generated parquet files
Implemented dictionary encoding for the non-varlength types.
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170 changes: 170 additions & 0 deletions
170
...ec/src/main/java/org/apache/drill/exec/store/parquet/NullableFixedByteAlignedReaders.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /** | ||
| * 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.drill.exec.store.parquet; | ||
|
|
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| import org.apache.drill.common.exceptions.ExecutionSetupException; | ||
| import org.apache.drill.exec.vector.*; | ||
|
|
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| import org.apache.drill.exec.vector.NullableBigIntVector; | ||
| import org.apache.drill.exec.vector.NullableFloat4Vector; | ||
| import org.apache.drill.exec.vector.NullableFloat8Vector; | ||
| import org.apache.drill.exec.vector.NullableIntVector; | ||
| import parquet.column.ColumnDescriptor; | ||
| import parquet.column.Encoding; | ||
| import parquet.format.ConvertedType; | ||
| import parquet.format.SchemaElement; | ||
| import parquet.hadoop.metadata.ColumnChunkMetaData; | ||
| import parquet.schema.PrimitiveType; | ||
|
|
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| class NullableFixedByteAlignedReaders { | ||
|
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| public static NullableColumnReader getNullableColumnReader(ParquetRecordReader parentReader, int allocateSize, | ||
| ColumnDescriptor columnDescriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, | ||
| boolean fixedLength, | ||
| ValueVector valueVec, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| if (! columnChunkMetaData.getEncodings().contains(Encoding.PLAIN_DICTIONARY)) { | ||
| return new NullableFixedByteAlignedReader(parentReader, allocateSize, columnDescriptor, columnChunkMetaData, | ||
| fixedLength, valueVec, schemaElement); | ||
| } else { | ||
| if (columnDescriptor.getType() == PrimitiveType.PrimitiveTypeName.INT64) { | ||
| return new NullableDictionaryBigIntReader(parentReader, allocateSize, columnDescriptor, columnChunkMetaData, | ||
| fixedLength, (NullableBigIntVector)valueVec, schemaElement); | ||
| } | ||
| else if (columnDescriptor.getType() == PrimitiveType.PrimitiveTypeName.INT32) { | ||
| return new NullableDicationaryIntReader(parentReader, allocateSize, columnDescriptor, columnChunkMetaData, | ||
| fixedLength, (NullableIntVector)valueVec, schemaElement); | ||
| } | ||
| else if (columnDescriptor.getType() == PrimitiveType.PrimitiveTypeName.FLOAT) { | ||
| return new NullableDictionaryFloat4Reader(parentReader, allocateSize, columnDescriptor, columnChunkMetaData, | ||
| fixedLength, (NullableFloat4Vector)valueVec, schemaElement); | ||
| } | ||
| else if (columnDescriptor.getType() == PrimitiveType.PrimitiveTypeName.DOUBLE) { | ||
| return new NullableDictionaryFloat8Reader(parentReader, allocateSize, columnDescriptor, columnChunkMetaData, | ||
| fixedLength, (NullableFloat8Vector)valueVec, schemaElement); | ||
| } | ||
| else{ | ||
| throw new ExecutionSetupException("Unsupported nullable column type " + columnDescriptor.getType().name() ); | ||
| } | ||
| } | ||
| } | ||
|
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| private static class NullableFixedByteAlignedReader extends NullableColumnReader { | ||
| private byte[] bytes; | ||
|
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| NullableFixedByteAlignedReader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, ValueVector v, SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
|
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| // this method is called by its superclass during a read loop | ||
| @Override | ||
| protected void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
| this.recordsReadInThisIteration = recordsToReadInThisPass; | ||
|
|
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| // set up metadata | ||
| this.readStartInBytes = pageReadStatus.readPosInBytes; | ||
| this.readLengthInBits = recordsReadInThisIteration * dataTypeLengthInBits; | ||
| this.readLength = (int) Math.ceil(readLengthInBits / 8.0); | ||
| this.bytes = pageReadStatus.pageDataByteArray; | ||
|
|
||
| // fill in data. | ||
| vectorData.writeBytes(bytes, (int) readStartInBytes, (int) readLength); | ||
| } | ||
| } | ||
|
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| private static class NullableDicationaryIntReader extends NullableColumnReader<NullableIntVector> { | ||
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| private byte[] bytes; | ||
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| NullableDicationaryIntReader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, NullableIntVector v, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
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| // this method is called by its superclass during a read loop | ||
| @Override | ||
| protected void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
| if (usingDictionary) { | ||
| for (int i = 0; i < recordsToReadInThisPass; i++){ | ||
| valueVec.getMutator().setSafe(valuesReadInCurrentPass + i, pageReadStatus.valueReader.readInteger()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| private static class NullableDictionaryBigIntReader extends NullableColumnReader<NullableBigIntVector> { | ||
|
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| private byte[] bytes; | ||
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| NullableDictionaryBigIntReader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, NullableBigIntVector v, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
|
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| // this method is called by its superclass during a read loop | ||
| @Override | ||
| protected void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
| for (int i = 0; i < recordsToReadInThisPass; i++){ | ||
| valueVec.getMutator().setSafe(valuesReadInCurrentPass + i, pageReadStatus.valueReader.readLong()); | ||
| } | ||
| } | ||
| } | ||
|
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| private static class NullableDictionaryFloat4Reader extends NullableColumnReader<NullableFloat4Vector> { | ||
|
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| private byte[] bytes; | ||
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| NullableDictionaryFloat4Reader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, NullableFloat4Vector v, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
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| // this method is called by its superclass during a read loop | ||
| @Override | ||
| protected void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
| for (int i = 0; i < recordsToReadInThisPass; i++){ | ||
| valueVec.getMutator().setSafe(valuesReadInCurrentPass + i, pageReadStatus.valueReader.readFloat()); | ||
| } | ||
| } | ||
| } | ||
|
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| private static class NullableDictionaryFloat8Reader extends NullableColumnReader<NullableFloat8Vector> { | ||
|
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| private byte[] bytes; | ||
|
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| NullableDictionaryFloat8Reader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, NullableFloat8Vector v, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
|
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| // this method is called by its superclass during a read loop | ||
| @Override | ||
| protected void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
| for (int i = 0; i < recordsToReadInThisPass; i++){ | ||
| valueVec.getMutator().setSafe(valuesReadInCurrentPass + i, pageReadStatus.valueReader.readDouble()); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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54 changes: 54 additions & 0 deletions
54
.../src/main/java/org/apache/drill/exec/store/parquet/ParquetFixedWidthDictionaryReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| /******************************************************************************* | ||
| * 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.drill.exec.store.parquet; | ||
|
|
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| import org.apache.drill.common.exceptions.ExecutionSetupException; | ||
| import org.apache.drill.exec.vector.BigIntVector; | ||
| import org.apache.drill.exec.vector.ValueVector; | ||
| import parquet.column.ColumnDescriptor; | ||
| import parquet.format.ConvertedType; | ||
| import parquet.format.SchemaElement; | ||
| import parquet.hadoop.metadata.ColumnChunkMetaData; | ||
| import parquet.schema.PrimitiveType; | ||
|
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| public class ParquetFixedWidthDictionaryReader extends ColumnReader{ | ||
|
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| ParquetFixedWidthDictionaryReader(ParquetRecordReader parentReader, int allocateSize, ColumnDescriptor descriptor, | ||
| ColumnChunkMetaData columnChunkMetaData, boolean fixedLength, ValueVector v, | ||
| SchemaElement schemaElement) throws ExecutionSetupException { | ||
| super(parentReader, allocateSize, descriptor, columnChunkMetaData, fixedLength, v, schemaElement); | ||
| } | ||
|
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| @Override | ||
| public void readField(long recordsToReadInThisPass, ColumnReader firstColumnStatus) { | ||
|
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| recordsReadInThisIteration = Math.min(pageReadStatus.currentPage.getValueCount() | ||
| - pageReadStatus.valuesRead, recordsToReadInThisPass - valuesReadInCurrentPass); | ||
| int defLevel; | ||
| for (int i = 0; i < recordsReadInThisIteration; i++){ | ||
| defLevel = pageReadStatus.definitionLevels.readInteger(); | ||
| // if the value is defined | ||
| if (defLevel == columnDescriptor.getMaxDefinitionLevel()){ | ||
| if (columnDescriptor.getType() == PrimitiveType.PrimitiveTypeName.INT64) | ||
| ((BigIntVector)valueVec).getMutator().set(i + valuesReadInCurrentPass, | ||
| pageReadStatus.valueReader.readLong() ); | ||
| } | ||
| // otherwise the value is skipped, because the bit vector indicating nullability is zero filled | ||
| } | ||
| } | ||
| } |
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