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Original file line number Diff line number Diff line change
Expand Up @@ -23,8 +23,6 @@ import org.apache.spark.sql.functions.{lit, struct}
import org.apache.spark.sql.test.SharedSparkSession
import org.apache.spark.sql.types.StructType

import shims.DeltaExcludedBySparkVersionTestMixinShims

// spotless:off
abstract class DeleteSuiteBase extends QueryTest
with SharedSparkSession
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package shims
package org.apache.spark.sql.delta

import org.apache.spark.sql.QueryTest

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Original file line number Diff line number Diff line change
@@ -0,0 +1,210 @@
/*
* 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.delta

import org.apache.spark.sql.delta.actions.{AddCDCFile, AddFile, CommitInfo, RemoveFile}

import org.scalatest.Assertions._

import scala.collection.mutable.ArrayBuffer

/** Various helper methods to for metric tests. */
object DeltaMetricsUtils {

/**
* Get operation metrics of the last operation of a table.
*
* @param table
* The Delta table to query
* @return
* The operation metrics of the last command.
*/
def getLastOperationMetrics(table: io.delta.tables.DeltaTable): Map[String, Long] = {
table
.history()
.select("operationMetrics")
.take(1)
.head
.getMap(0)
.asInstanceOf[Map[String, String]]
.mapValues(_.toLong)
.toMap
}

def getLastOperationMetrics(tableName: String): Map[String, Long] = {
getLastOperationMetrics(io.delta.tables.DeltaTable.forName(tableName))
}

/**
* Assert that metrics of a Delta operation have the expected values.
*
* @param expectedMetrics
* The expected metrics the values of which to check.
* @param operationMetrics
* The operation metrics that were collected from Delta log.
*/
def checkOperationMetrics(
expectedMetrics: Map[String, Long],
operationMetrics: Map[String, Long]): Unit = {
val sep = System.lineSeparator() * 2
val failMessages = expectedMetrics
.flatMap {
case (metric, expectedValue) =>
// Check missing metrics.
var errMsg = if (!operationMetrics.contains(metric)) {
Some(s"""The recorded operation metrics does not contain metric: $metric"
| ExpectedMetrics = $expectedMetrics
| ActualMetrics = $operationMetrics
|""".stripMargin)
} else {
None
}

// Check negative values.
errMsg = errMsg.orElse {
if (operationMetrics(metric) < 0) {
Some(s"Invalid non-positive value for metric $metric: ${operationMetrics(metric)}")
} else {
None
}
}

// Check unexpected values.
errMsg = errMsg.orElse {
if (expectedValue != operationMetrics(metric)) {
Some(s"""The recorded metric for $metric does not equal the expected value.
| Expected = ${expectedMetrics(metric)}
| Actual = ${operationMetrics(metric)}
| ExpectedMetrics = $expectedMetrics
| ActualMetrics = $operationMetrics
|""".stripMargin)
} else {
None
}
}
errMsg
}
.mkString(sep, sep, sep)
.trim
assert(failMessages.isEmpty)
}

/**
* Check that time metrics for a Delta operation are valid.
*
* @param operationMetrics
* The collected operation metrics from the Delta log.
* @param expectedMetrics
* The keys of the expected time metrics. Set to None to check for common time metrics.
*/
def checkOperationTimeMetrics(
operationMetrics: Map[String, Long],
expectedMetrics: Set[String]): Unit = {
// Validate that all time metrics exist and have a non-negative value.
for (key <- expectedMetrics) {
assert(operationMetrics.contains(key), s"Missing operation metric $key")
val value: Long = operationMetrics(key)
assert(value >= 0, s"Invalid non-positive value for metric $key: $value")
}

// Validate that if 'executionTimeMs' exists, is larger than all other time metrics.
if (expectedMetrics.contains("executionTimeMs")) {
val executionTimeMs = operationMetrics("executionTimeMs")
val maxTimeMs =
operationMetrics.filterKeys(k => expectedMetrics.contains(k)).valuesIterator.max
assert(executionTimeMs == maxTimeMs)
}
}

/**
* Computes the expected operation metrics from the actions in a Delta commit.
*
* @param deltaLog
* The Delta log of the table.
* @param version
* The version of the commit.
* @return
* A map with the expected operation metrics.
*/
def getOperationMetricsFromCommitActions(deltaLog: DeltaLog, version: Long): Map[String, Long] = {
val (_, changes) = deltaLog.getChanges(version).next()
val commitInfo = changes.collect { case ci: CommitInfo => ci }.head
val operationName = commitInfo.operation

var filesAdded = ArrayBuffer.empty[AddFile]
var filesRemoved = ArrayBuffer.empty[RemoveFile]
val changeFilesAdded = ArrayBuffer.empty[AddCDCFile]
changes.foreach {
case a: AddFile => filesAdded.append(a)
case r: RemoveFile => filesRemoved.append(r)
case c: AddCDCFile => changeFilesAdded.append(c)
case _ => // Nothing
}

// Filter-out DV updates from files added and removed.
val pathsWithDvUpdate = filesAdded.map(_.path).toSet & filesRemoved.map(_.path).toSet
filesAdded = filesAdded.filter(a => !pathsWithDvUpdate.contains(a.path))
val numFilesAdded = filesAdded.size
val numBytesAdded = filesAdded.map(_.size).sum

filesRemoved = filesRemoved.filter(r => !pathsWithDvUpdate.contains(r.path))
val numFilesRemoved = filesRemoved.size
val numBytesRemoved = filesRemoved.map(_.size.getOrElse(0L)).sum

val numChangeFilesAdded = changeFilesAdded.size

operationName match {
case "MERGE" =>
Map(
"numTargetFilesAdded" -> numFilesAdded,
"numTargetFilesRemoved" -> numFilesRemoved,
"numTargetBytesAdded" -> numBytesAdded,
"numTargetBytesRemoved" -> numBytesRemoved,
"numTargetChangeFilesAdded" -> numChangeFilesAdded
)
case "UPDATE" | "DELETE" =>
Map(
"numAddedFiles" -> numFilesAdded,
"numRemovedFiles" -> numFilesRemoved,
"numAddedBytes" -> numBytesAdded,
"numRemovedBytes" -> numBytesRemoved,
"numAddedChangeFiles" -> numChangeFilesAdded
)
case _ =>
throw new UnsupportedOperationException(s"Unsupported operation: $operationName")
}
}

/**
* Checks the provided operation metrics against the actions in a Delta commit.
*
* @param deltaLog
* The Delta log of the table.
* @param version
* The version of the commit.
* @param operationMetrics
* The operation metrics that were collected from Delta log.
*/
def checkOperationMetricsAgainstCommitActions(
deltaLog: DeltaLog,
version: Long,
operationMetrics: Map[String, Long]): Unit = {
checkOperationMetrics(
expectedMetrics = getOperationMetricsFromCommitActions(deltaLog, version),
operationMetrics = operationMetrics)
}
}
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