i7xh commented on a change in pull request #1085: URL: https://github.com/apache/incubator-kyuubi/pull/1085#discussion_r708107709
########## File path: dev/kyuubi-extension-spark-3-1/src/main/scala/org/apache/kyuubi/sql/watchdog/ForcedMaxOutputRowsRule.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.kyuubi.sql.watchdog + +import org.apache.spark.sql.SparkSession +import org.apache.spark.sql.catalyst.dsl.expressions._ +import org.apache.spark.sql.catalyst.plans.logical.{GlobalLimit, LogicalPlan, Project} +import org.apache.spark.sql.catalyst.rules.Rule +import org.apache.spark.sql.catalyst.trees.Origin +import org.apache.spark.sql.execution.command.InsertIntoDataSourceDirCommand + +import org.apache.kyuubi.sql.KyuubiSQLConf + +/* +* Add ForcedMaxOutputRows rule for output rows limitation to avoid huge output rows of non_limit query unexpectedly +* mainly applied to cases as below: +* case 1: +* {{{ +* INSERT OVERWRITE DIRECTORY (path=STRING)? +* USING format OPTIONS ([option1_name "option1_value", option2_name "option2_value", ...]) +* SELECT ... +* }}} +* +* case 2: +* {{{ +* SELECT [c1, c2, ...] +* }}} +* +* case 3: +* {{{ +* WITH CTE AS ( +* ...) +* SELECT [c1, c2, ...] FROM CTE ... +* }}} +* +* The Logical Rule add a GlobalLimit node before root project +* */ +case class ForcedMaxOutputRowsRule(session: SparkSession) extends Rule[LogicalPlan] { + override def apply(plan: LogicalPlan): LogicalPlan = { + if (!plan.resolved) { + plan + } else { + conf.getConf(KyuubiSQLConf.WATCHDOG_FORCED_MAXOUTPUTROWS) match { + case Some(forcedMaxOutputRows) => plan match { + case insert@InsertIntoDataSourceDirCommand(_, _, Project(_, _), _) => + insert.copy(query = GlobalLimit(forcedMaxOutputRows, insert.query)) + case project@Project(_, _) => project.origin match { Review comment: > we can match more nodes e.g. (Filter, Aggregate, Join ...), how about: > > ``` > case _: ExecutedCommandExec => plan > case _: CommandResultExec => plan > case _: V2CommandExec => plan > case c: DataWritingCommandExec => c.copy(child = apply(c.child)) > case p => apply(p) > ``` Generally root output node is `Project` or `Aggregate` in Analyzer，tree node level or order will be changed in Optimizer -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
