Chengxiang Li created FLINK-3504: ------------------------------------ Summary: [SQL] Join fails while have expression inside join condition. Key: FLINK-3504 URL: https://issues.apache.org/jira/browse/FLINK-3504 Project: Flink Issue Type: Bug Components: Table API Reporter: Chengxiang Li
{noformat} val ds1 = CollectionDataSets.get3TupleDataSet(env).as('a, 'b, 'c) val ds2 = CollectionDataSets.get5TupleDataSet(env).as('d, 'e, 'f, 'g, 'h) val joinT = ds1.join(ds2).filter('a + 3 === 'd).select('c, 'g) {noformat} This query would throw exception: {noformat} Caused by: org.apache.flink.api.table.TableException: Joins should have at least one equality condition at org.apache.flink.api.table.plan.rules.dataset.DataSetJoinRule.convert(DataSetJoinRule.scala:57) at org.apache.calcite.rel.convert.ConverterRule.onMatch(ConverterRule.java:116) at org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:228) ... 44 more {noformat} There are 2 issues here: # DataSetJoinRule does not support expression inside join condition. # JoinPushExpressionsRulewould add a Project to calculate expression value before Join, so the join condition does not include expression any more, however, it's not returned after the logical optimization. -- This message was sent by Atlassian JIRA (v6.3.4#6332)