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Add type widening delta sharing tests
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sharing/src/test/scala/io/delta/sharing/spark/DeltaSharingDataSourceTypeWideningSuite.scala
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| /* | ||
| * Copyright (2021) The Delta Lake Project Authors. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
|
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| package io.delta.sharing.spark | ||
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| import org.apache.spark.sql.delta.DeltaConfigs | ||
| import org.apache.spark.sql.delta.test.DeltaSQLCommandTest | ||
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| import org.apache.spark.SparkConf | ||
| import org.apache.spark.sql.{DataFrame, QueryTest} | ||
| import org.apache.spark.sql.delta.sharing.DeltaSharingTestSparkUtils | ||
| import org.apache.spark.sql.types._ | ||
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| // Unit tests to verify that type widening works with delta sharing. | ||
| class DeltaSharingDataSourceTypeWideningSuite | ||
| extends QueryTest | ||
| with DeltaSQLCommandTest | ||
| with DeltaSharingTestSparkUtils | ||
| with DeltaSharingDataSourceDeltaTestUtils { | ||
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| import testImplicits._ | ||
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| protected override def sparkConf: SparkConf = { | ||
| super.sparkConf | ||
| .set(DeltaConfigs.ENABLE_TYPE_WIDENING.defaultTablePropertyKey, true.toString) | ||
| } | ||
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| /** Sets up delta sharing mocks to read a table and validates results. */ | ||
| private def testReadingDeltaShare( | ||
| tableName: String, | ||
| versionAsOf: Option[Long], | ||
| responseFormat: String, | ||
| expectedSchema: StructType, | ||
| expectedResult: DataFrame): Unit = { | ||
| withTempDir { tempDir => | ||
| val sharedTableName = | ||
| if (responseFormat == DeltaSharingOptions.RESPONSE_FORMAT_DELTA) { | ||
| "type_widening_shared_delta_table" | ||
| } else { | ||
| "type_widening_shared_parquet_table" | ||
| } | ||
| prepareMockedClientMetadata(tableName, sharedTableName) | ||
| prepareMockedClientGetTableVersion(tableName, sharedTableName, versionAsOf) | ||
| if (responseFormat == DeltaSharingOptions.RESPONSE_FORMAT_DELTA) { | ||
| prepareMockedClientAndFileSystemResult(tableName, sharedTableName, versionAsOf) | ||
| } else { | ||
| assert(responseFormat == DeltaSharingOptions.RESPONSE_FORMAT_PARQUET) | ||
| prepareMockedClientAndFileSystemResultForParquet(tableName, sharedTableName, versionAsOf) | ||
| } | ||
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| var reader = spark.read | ||
| .format("deltaSharing") | ||
| .option("responseFormat", responseFormat) | ||
| versionAsOf.foreach { version => | ||
| reader = reader.option("versionAsOf", version) | ||
| } | ||
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| withSQLConf(getDeltaSharingClassesSQLConf.toSeq: _*) { | ||
| val profileFile = prepareProfileFile(tempDir) | ||
| val result = reader.load(s"${profileFile.getCanonicalPath}#share1.default.$sharedTableName") | ||
| assert(result.schema === expectedSchema) | ||
| checkAnswer(result, expectedResult) | ||
| } | ||
| } | ||
| } | ||
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| /** Creates a table and applies a type change to it. */ | ||
| private def withTestTable(testBody: String => Unit): Unit = { | ||
| val deltaTableName = "type_widening_table" | ||
| withTable(deltaTableName) { | ||
| sql(s"CREATE TABLE $deltaTableName (value SMALLINT) USING DELTA") | ||
| sql(s"INSERT INTO $deltaTableName VALUES (1), (2)") | ||
| sql(s"ALTER TABLE $deltaTableName CHANGE COLUMN value TYPE INT") | ||
| sql(s"INSERT INTO $deltaTableName VALUES (3), (${Int.MaxValue})") | ||
| sql(s"INSERT INTO $deltaTableName VALUES (4), (5)") | ||
| testBody(deltaTableName) | ||
| } | ||
| } | ||
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| /** Short-hand for the type widening metadata for column `value` for the test table above. */ | ||
| private val typeWideningMetadata: Metadata = | ||
| new MetadataBuilder() | ||
| .putMetadataArray( | ||
| "delta.typeChanges", Array( | ||
| new MetadataBuilder() | ||
| .putLong("tableVersion", 2) | ||
| .putString("fromType", "short") | ||
| .putString("toType", "integer") | ||
| .build())) | ||
| .build() | ||
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| for (responseFormat <- Seq(DeltaSharingOptions.RESPONSE_FORMAT_DELTA, | ||
| DeltaSharingOptions.RESPONSE_FORMAT_PARQUET)) { | ||
| test(s"Delta sharing with type widening, responseFormat=$responseFormat") { | ||
| withTestTable { tableName => | ||
| testReadingDeltaShare( | ||
| tableName, | ||
| versionAsOf = None, | ||
| responseFormat, | ||
| expectedSchema = new StructType() | ||
| .add("value", IntegerType, nullable = true, metadata = typeWideningMetadata), | ||
| expectedResult = Seq(1, 2, 3, Int.MaxValue, 4, 5).toDF("value")) | ||
| } | ||
| } | ||
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| test(s"Delta sharing with type widening, time travel, responseFormat=$responseFormat") { | ||
| withTestTable { tableName => | ||
| testReadingDeltaShare( | ||
| tableName, | ||
| versionAsOf = Some(3), | ||
| responseFormat = DeltaSharingOptions.RESPONSE_FORMAT_DELTA, | ||
| expectedSchema = new StructType() | ||
| .add("value", IntegerType, nullable = true, metadata = typeWideningMetadata), | ||
| expectedResult = Seq(1, 2, 3, Int.MaxValue).toDF("value")) | ||
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| testReadingDeltaShare( | ||
| tableName, | ||
| versionAsOf = Some(2), | ||
| responseFormat = DeltaSharingOptions.RESPONSE_FORMAT_DELTA, | ||
| expectedSchema = new StructType() | ||
| .add("value", IntegerType, nullable = true, metadata = typeWideningMetadata), | ||
| expectedResult = Seq(1, 2).toDF("value")) | ||
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| testReadingDeltaShare( | ||
| tableName, | ||
| versionAsOf = Some(1), | ||
| responseFormat = DeltaSharingOptions.RESPONSE_FORMAT_DELTA, | ||
| expectedSchema = new StructType() | ||
| .add("value", ShortType), | ||
| expectedResult = Seq(1, 2).toDF("value")) | ||
| } | ||
| } | ||
| } | ||
| } |
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