Examples with EXPIRED_CUBE io.prestosql.spi.connector.StandardWarningCode.EXPIRED_CUBE used on opensource projects

Example 1 with EXPIRED_CUBE

use of io.prestosql.spi.connector.StandardWarningCode.EXPIRED_CUBE in project hetu-core by openlookeng.

the class StarTreeAggregationRule method optimize.

public Result optimize(AggregationNode aggregationNode, final PlanNode filterNode, TableScanNode tableScanNode, Map<String, Object> symbolMapping, Session session, PlanSymbolAllocator symbolAllocator, PlanNodeIdAllocator idAllocator, WarningCollector warningCollector) {
    TableHandle tableHandle = tableScanNode.getTable();
    TableMetadata tableMetadata = metadata.getTableMetadata(session, tableHandle);
    String tableName = tableMetadata.getQualifiedName().toString();
    CubeStatement statement = CubeStatementGenerator.generate(tableName, aggregationNode, symbolMapping);
    // Don't use star-tree for non-aggregate queries
    if (statement.getAggregations().isEmpty()) {
        return Result.empty();
    }
    boolean hasDistinct = statement.getAggregations().stream().anyMatch(AggregationSignature::isDistinct);
    // Since cube is pre-aggregated, utilising it for such queries could return incorrect result
    if (aggregationNode.hasEmptyGroupingSet() && hasDistinct) {
        return Result.empty();
    }
    List<CubeMetadata> cubeMetadataList = CubeMetadata.filter(this.cubeMetaStore.getMetadataList(statement.getFrom()), statement);
    // Compare FilterNode predicate with Cube predicates to evaluate which cube can be used.
    List<CubeMetadata> matchedCubeMetadataList = cubeMetadataList.stream().filter(cubeMetadata -> filterPredicateMatches((FilterNode) filterNode, cubeMetadata, session, symbolAllocator.getTypes())).collect(Collectors.toList());
    // Match based on filter conditions
    if (matchedCubeMetadataList.isEmpty()) {
        return Result.empty();
    }
    LongSupplier lastModifiedTimeSupplier = metadata.getTableLastModifiedTimeSupplier(session, tableHandle);
    if (lastModifiedTimeSupplier == null) {
        warningCollector.add(new PrestoWarning(EXPIRED_CUBE, "Unable to identify last modified time of " + tableName + ". Ignoring star tree cubes."));
        return Result.empty();
    }
    // Filter out cubes that were created before the source table was updated
    long lastModifiedTime = lastModifiedTimeSupplier.getAsLong();
    // There was a problem retrieving last modified time, we should skip using star tree rather than failing the query
    if (lastModifiedTime == -1L) {
        return Result.empty();
    }
    matchedCubeMetadataList = matchedCubeMetadataList.stream().filter(cubeMetadata -> cubeMetadata.getSourceTableLastUpdatedTime() >= lastModifiedTime).collect(Collectors.toList());
    if (matchedCubeMetadataList.isEmpty()) {
        warningCollector.add(new PrestoWarning(EXPIRED_CUBE, tableName + " has been modified after creating cubes. Ignoring expired cubes."));
        return Result.empty();
    }
    // If multiple cubes are matching then lets select the recent built cube
    // so sort the cube based on the last updated time stamp
    matchedCubeMetadataList.sort(Comparator.comparingLong(CubeMetadata::getLastUpdatedTime).reversed());
    CubeMetadata matchedCubeMetadata = matchedCubeMetadataList.get(0);
    AggregationRewriteWithCube aggregationRewriteWithCube = new AggregationRewriteWithCube(metadata, session, symbolAllocator, idAllocator, symbolMapping, matchedCubeMetadata);
    return Result.ofPlanNode(aggregationRewriteWithCube.rewrite(aggregationNode, rewriteByRemovingSourceFilter(filterNode, matchedCubeMetadata)));
}