ajantha-bhat commented on code in PR #10288: URL: https://github.com/apache/iceberg/pull/10288#discussion_r1593501067
########## spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/actions/AnalyzeTableSparkAction.java: ########## @@ -0,0 +1,150 @@ +/* + * 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.iceberg.spark.actions; + +import java.io.IOException; +import java.util.List; +import java.util.Set; +import java.util.stream.Collectors; +import org.apache.iceberg.StatisticsFile; +import org.apache.iceberg.Table; +import org.apache.iceberg.actions.AnalyzeTable; +import org.apache.iceberg.actions.ImmutableAnalyzeTable; +import org.apache.iceberg.exceptions.ValidationException; +import org.apache.iceberg.puffin.StandardBlobTypes; +import org.apache.iceberg.relocated.com.google.common.collect.Lists; +import org.apache.iceberg.relocated.com.google.common.collect.Sets; +import org.apache.iceberg.spark.JobGroupInfo; +import org.apache.iceberg.types.Type; +import org.apache.iceberg.types.Types; +import org.apache.spark.sql.SparkSession; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +/** Computes the statistic of the given columns and stores it as Puffin files. */ +public class AnalyzeTableSparkAction extends BaseSparkAction<AnalyzeTableSparkAction> + implements AnalyzeTable { + + private static final Logger LOG = LoggerFactory.getLogger(AnalyzeTableSparkAction.class); + private final Table table; + private Set<String> columnsToBeAnalyzed; + private Set<String> statsToBecollected = + Sets.newHashSet(StandardBlobTypes.APACHE_DATASKETCHES_THETA_V1); + + AnalyzeTableSparkAction(SparkSession spark, Table table) { + super(spark); + this.table = table; + } + + @Override + protected AnalyzeTableSparkAction self() { + return this; + } + + @Override + public Result execute() { + String desc = String.format("Analyzing table %s", table.name()); + JobGroupInfo info = newJobGroupInfo("ANALYZE-TABLE", desc); + return withJobGroupInfo(info, this::doExecute); + } + + private Result doExecute() { + LOG.info("Starting the analysis of {}", table.name()); + validateColumns(); + List<AnalysisResult> analysisResults = + statsToBecollected.stream() + .map( + statsName -> { + switch (statsName) { + case StandardBlobTypes.APACHE_DATASKETCHES_THETA_V1: + return generateNDVAndCommit(); + default: + return ImmutableAnalyzeTable.AnalysisResult.builder() + .statsName(statsName) + .statsCollected(false) + .addAllErrors(Lists.newArrayList("Stats type not supported")) + .build(); + } + }) + .collect(Collectors.toList()); + return ImmutableAnalyzeTable.Result.builder().analysisResults(analysisResults).build(); + } + + private void validateColumns() { + validateEmptyColumns(); + validateTypes(); + } + + private void validateEmptyColumns() { + if (columnsToBeAnalyzed == null || columnsToBeAnalyzed.isEmpty()) { + throw new ValidationException("No columns to analyze for the table", table.name()); + } + } + + private void validateTypes() { + columnsToBeAnalyzed.forEach( + columnName -> { + Types.NestedField field = table.schema().findField(columnName); + if (field == null) { + throw new ValidationException("No column with %s name in the table", columnName); + } + Type type = field.type(); + if (type.isListType() || type.isMapType() || type.isNestedType() || type.isStructType()) { + throw new ValidationException( + "Analysis not supported on column %s of type %s", columnName, type.typeId()); + } + }); + } + + private AnalysisResult generateNDVAndCommit() { + try { + StatisticsFile statisticsFile = + NDVSketchGenerator.generateNDV( + spark(), table, columnsToBeAnalyzed.toArray(new String[0])); + table + .updateStatistics() + .setStatistics(table.currentSnapshot().snapshotId(), statisticsFile) Review Comment: what if table's current snapshot has modified concurrently by another client between like 117 to line 120? -- This is an automated message from the Apache Git Service. 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