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ASF GitHub Bot commented on FLINK-4565: --------------------------------------- Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/2870#discussion_r90495217 --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/expressions/In.scala --- @@ -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. + */ + +package org.apache.flink.api.table.expressions + +import org.apache.calcite.rex.RexNode +import org.apache.calcite.sql.SqlOperator +import org.apache.calcite.sql.fun.SqlStdOperatorTable +import org.apache.calcite.tools.RelBuilder +import org.apache.flink.api.common.typeinfo.BasicTypeInfo._ +import org.apache.flink.api.common.typeinfo.TypeInformation +import org.apache.flink.api.table.typeutils.TypeCheckUtils._ +import org.apache.flink.api.table.validate.{ValidationResult, ValidationFailure, ValidationSuccess} + +case class In(expressions: Seq[Expression]) extends Expression { + override def toString = s"${expressions.head}.in(${expressions.tail.mkString(", ")})" + + /** + * List of child nodes that should be considered when doing transformations. Other values + * in the Product will not be transformed, only handed through. + */ + override private[flink] def children: Seq[Expression] = expressions + + private[flink] val sqlOperator: SqlOperator = SqlStdOperatorTable.IN + + override private[flink] def toRexNode(implicit relBuilder: RelBuilder): RexNode = { + relBuilder.call(SqlStdOperatorTable.IN, children.map(_.toRexNode): _*) --- End diff -- Can we add a deduplication step for the literal values before translating them? > Support for SQL IN operator > --------------------------- > > Key: FLINK-4565 > URL: https://issues.apache.org/jira/browse/FLINK-4565 > Project: Flink > Issue Type: Improvement > Components: Table API & SQL > Reporter: Timo Walther > Assignee: Nikolay Vasilishin > > It seems that Flink SQL supports the uncorrelated sub-query IN operator. But > it should also be available in the Table API and tested. -- This message was sent by Atlassian JIRA (v6.3.4#6332)