somani commented on a change in pull request #35789: URL: https://github.com/apache/spark/pull/35789#discussion_r828279487
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/BloomFilterAggregate.scala ########## @@ -0,0 +1,197 @@ +/* + * 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.spark.sql.catalyst.expressions.aggregate + +import java.io.ByteArrayInputStream +import java.io.ByteArrayOutputStream + +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.catalyst.analysis.TypeCheckResult +import org.apache.spark.sql.catalyst.analysis.TypeCheckResult._ +import org.apache.spark.sql.catalyst.expressions._ +import org.apache.spark.sql.catalyst.trees.TernaryLike +import org.apache.spark.sql.types._ +import org.apache.spark.util.sketch.BloomFilter + +/** + * An internal aggregate function that creates a Bloom filter from input values. + * + * @param child Child expression of Long values for creating a Bloom filter. + * @param estimatedNumItemsExpression The number of estimated distinct items (optional). + * @param numBitsExpression The number of bits to use (optional). + */ +case class BloomFilterAggregate( + child: Expression, + estimatedNumItemsExpression: Expression, + numBitsExpression: Expression, Review comment: We use it in tests as SQL function (BloomFilterAggregateQuerySuite) ########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BloomFilterMightContain.scala ########## @@ -0,0 +1,116 @@ +/* + * 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.spark.sql.catalyst.expressions + +import java.io.ByteArrayInputStream + +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.catalyst.analysis.TypeCheckResult +import org.apache.spark.sql.catalyst.expressions.codegen.{CodegenContext, CodeGenerator, ExprCode, JavaCode, TrueLiteral} +import org.apache.spark.sql.catalyst.expressions.codegen.Block.BlockHelper +import org.apache.spark.sql.catalyst.trees.TreePattern.OUTER_REFERENCE +import org.apache.spark.sql.types._ +import org.apache.spark.util.sketch.BloomFilter + +/** + * An internal scalar function that returns the membership check result (either true or false) + * for values of `valueExpression` in the Bloom filter represented by `bloomFilterExpression`. + * Not that since the function is "might contain", always returning true regardless is not + * wrong. + * Note that this expression requires that `bloomFilterExpression` is either a constant value or + * an uncorrelated scalar subquery. This is sufficient for the Bloom filter join rewrite. + * + * @param bloomFilterExpression the Binary data of Bloom filter. + * @param valueExpression the Long value to be tested for the membership of `bloomFilterExpression`. + */ +case class BloomFilterMightContain( + bloomFilterExpression: Expression, + valueExpression: Expression) extends BinaryExpression { + + override def nullable: Boolean = true + override def left: Expression = bloomFilterExpression + override def right: Expression = valueExpression + override def prettyName: String = "might_contain" + override def dataType: DataType = BooleanType + + override def checkInputDataTypes(): TypeCheckResult = { + val typeCheckResult = (left.dataType, right.dataType) match { + case (BinaryType, NullType) | (NullType, LongType) | (NullType, NullType) | + (BinaryType, LongType) => TypeCheckResult.TypeCheckSuccess + case _ => TypeCheckResult.TypeCheckFailure(s"Input to function $prettyName should have " + + s"been ${BinaryType.simpleString} followed by a value with ${LongType.simpleString}, " + + s"but it's [${left.dataType.catalogString}, ${right.dataType.catalogString}].") + } + if (typeCheckResult.isFailure) { + return typeCheckResult + } + bloomFilterExpression match { + case e : Expression if e.foldable => TypeCheckResult.TypeCheckSuccess + case subquery : PlanExpression[_] if !subquery.containsPattern(OUTER_REFERENCE) => + TypeCheckResult.TypeCheckSuccess + case _ => + TypeCheckResult.TypeCheckFailure(s"The Bloom filter binary input to $prettyName " + + "should be either a constant value or a scalar subquery expression") + } + } + + override protected def withNewChildrenInternal( + newBloomFilterExpression: Expression, + newValueExpression: Expression): BloomFilterMightContain = + copy(bloomFilterExpression = newBloomFilterExpression, + valueExpression = newValueExpression) + + // The bloom filter created from `bloomFilterExpression`. + @transient private lazy val bloomFilter = { Review comment: The bloom filter is calculated as a scalar subquery, so it is similar to broadcasting it. -- This is an automated message from the Apache Git Service. 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