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[spark] PaimonSplitScan supports column pruning and filter push down (#…
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paimon-core/src/main/java/org/apache/paimon/table/KnownSplitsTable.java
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| @@ -0,0 +1,90 @@ | ||
| /* | ||
| * 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; | ||
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| import org.apache.paimon.table.source.DataSplit; | ||
| import org.apache.paimon.table.source.InnerTableRead; | ||
| import org.apache.paimon.table.source.InnerTableScan; | ||
| import org.apache.paimon.types.RowType; | ||
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| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * A table to hold some known data splits. For now, it is only used by internal for Spark engine. | ||
| */ | ||
| public class KnownSplitsTable implements ReadonlyTable { | ||
| private final InnerTable origin; | ||
| private final DataSplit[] splits; | ||
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| KnownSplitsTable(InnerTable origin, DataSplit[] splits) { | ||
| this.origin = origin; | ||
| this.splits = splits; | ||
| } | ||
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| public static KnownSplitsTable create(InnerTable origin, DataSplit[] splits) { | ||
| return new KnownSplitsTable(origin, splits); | ||
| } | ||
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| public DataSplit[] splits() { | ||
| return splits; | ||
| } | ||
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| @Override | ||
| public String name() { | ||
| return origin.name(); | ||
| } | ||
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| @Override | ||
| public RowType rowType() { | ||
| return origin.rowType(); | ||
| } | ||
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| @Override | ||
| public List<String> primaryKeys() { | ||
| return origin.primaryKeys(); | ||
| } | ||
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| @Override | ||
| public List<String> partitionKeys() { | ||
| return origin.partitionKeys(); | ||
| } | ||
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| @Override | ||
| public Map<String, String> options() { | ||
| return origin.options(); | ||
| } | ||
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| @Override | ||
| public InnerTableRead newRead() { | ||
| return origin.newRead(); | ||
| } | ||
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| // ===== unused method =========================================== | ||
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| @Override | ||
| public InnerTableScan newScan() { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public Table copy(Map<String, String> dynamicOptions) { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| } |
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73 changes: 73 additions & 0 deletions
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...paimon-spark-common/src/main/scala/org/apache/paimon/spark/ColumnPruningAndPushDown.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| * 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.spark | ||
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| import org.apache.paimon.predicate.{Predicate, PredicateBuilder} | ||
| import org.apache.paimon.spark.schema.PaimonMetadataColumn | ||
| import org.apache.paimon.table.Table | ||
| import org.apache.paimon.table.source.ReadBuilder | ||
| import org.apache.paimon.types.RowType | ||
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| import org.apache.spark.sql.connector.read.Scan | ||
| import org.apache.spark.sql.types.StructType | ||
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| trait ColumnPruningAndPushDown extends Scan { | ||
| def table: Table | ||
| def requiredSchema: StructType | ||
| def filters: Seq[Predicate] | ||
| def pushDownLimit: Option[Int] = None | ||
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| val tableRowType: RowType = table.rowType | ||
| val tableSchema: StructType = SparkTypeUtils.fromPaimonRowType(tableRowType) | ||
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| final def partitionType: StructType = { | ||
| SparkTypeUtils.toSparkPartitionType(table) | ||
| } | ||
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| private[paimon] val (requiredTableFields, metadataFields) = { | ||
| val nameToField = tableSchema.map(field => (field.name, field)).toMap | ||
| val _tableFields = requiredSchema.flatMap(field => nameToField.get(field.name)) | ||
| val _metadataFields = | ||
| requiredSchema | ||
| .filterNot(field => tableSchema.fieldNames.contains(field.name)) | ||
| .filter(field => PaimonMetadataColumn.SUPPORTED_METADATA_COLUMNS.contains(field.name)) | ||
| (_tableFields, _metadataFields) | ||
| } | ||
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| lazy val readBuilder: ReadBuilder = { | ||
| val _readBuilder = table.newReadBuilder() | ||
| val projection = | ||
| requiredTableFields.map(field => tableSchema.fieldNames.indexOf(field.name)).toArray | ||
| _readBuilder.withProjection(projection) | ||
| if (filters.nonEmpty) { | ||
| val pushedPredicate = PredicateBuilder.and(filters: _*) | ||
| _readBuilder.withFilter(pushedPredicate) | ||
| } | ||
| pushDownLimit.foreach(_readBuilder.withLimit) | ||
| _readBuilder | ||
| } | ||
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| final def metadataColumns: Seq[PaimonMetadataColumn] = { | ||
| metadataFields.map(field => PaimonMetadataColumn.get(field.name, partitionType)) | ||
| } | ||
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| override def readSchema(): StructType = { | ||
| StructType(requiredTableFields ++ metadataFields) | ||
| } | ||
| } |
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