Examples with SelectionResults com.linkedin.pinot.common.response.broker.SelectionResults used on opensource projects

Example 1 with SelectionResults

use of com.linkedin.pinot.common.response.broker.SelectionResults in project pinot by linkedin.

the class BrokerReduceService method setSelectionResults.

/**
   * Reduce selection results from multiple servers and set them into BrokerResponseNative passed in.
   *
   * @param brokerResponseNative broker response.
   * @param selection selection information.
   * @param dataTableMap map from server to data table.
   * @param dataSchema data schema.
   */
private void setSelectionResults(@Nonnull BrokerResponseNative brokerResponseNative, @Nonnull Selection selection, @Nonnull Map<ServerInstance, DataTable> dataTableMap, @Nonnull DataSchema dataSchema) {
    // Reduce the selection results.
    SelectionResults selectionResults;
    int selectionSize = selection.getSize();
    if (selection.isSetSelectionSortSequence() && selectionSize != 0) {
        // Selection order-by.
        SelectionOperatorService selectionService = new SelectionOperatorService(selection, dataSchema);
        selectionService.reduceWithOrdering(dataTableMap);
        selectionResults = selectionService.renderSelectionResultsWithOrdering();
    } else {
        // Selection only.
        selectionResults = SelectionOperatorUtils.renderSelectionResultsWithoutOrdering(SelectionOperatorUtils.reduceWithoutOrdering(dataTableMap, selectionSize), dataSchema, SelectionOperatorUtils.getSelectionColumns(selection.getSelectionColumns(), dataSchema));
    }
    brokerResponseNative.setSelectionResults(selectionResults);
}

Example 2 with SelectionResults

use of com.linkedin.pinot.common.response.broker.SelectionResults in project pinot by linkedin.

the class SelectionOperatorServiceTest method testCompatibleRowsRenderSelectionResultsWithoutOrdering.

@Test
public void testCompatibleRowsRenderSelectionResultsWithoutOrdering() {
    List<Serializable[]> rows = new ArrayList<>(2);
    rows.add(_row1.clone());
    rows.add(_compatibleRow1.clone());
    SelectionResults selectionResults = SelectionOperatorUtils.renderSelectionResultsWithoutOrdering(rows, _upgradedDataSchema, Arrays.asList(_columnNames));
    List<Serializable[]> formattedRows = selectionResults.getRows();
    Serializable[] expectedFormattedRow1 = { "0", "1.0", "2.0", "3.0", "4", new String[] { "5" }, new String[] { "6.0" }, new String[] { "7.0" }, new String[] { "8.0" }, new String[] { "9" } };
    Serializable[] expectedFormattedRow2 = { "1", "2.0", "3.0", "4.0", "5", new String[] { "6" }, new String[] { "7.0" }, new String[] { "8.0" }, new String[] { "9.0" }, new String[] { "10" } };
    Assert.assertEquals(formattedRows.get(0), expectedFormattedRow1);
    Assert.assertEquals(formattedRows.get(1), expectedFormattedRow2);
}

Example 3 with SelectionResults

use of com.linkedin.pinot.common.response.broker.SelectionResults in project pinot by linkedin.

the class SelectionOperatorServiceTest method testCompatibleRowsRenderSelectionResultsWithOrdering.

@Test
public void testCompatibleRowsRenderSelectionResultsWithOrdering() {
    SelectionOperatorService selectionOperatorService = new SelectionOperatorService(_selectionOrderBy, _upgradedDataSchema);
    PriorityQueue<Serializable[]> rows = selectionOperatorService.getRows();
    rows.offer(_row1.clone());
    rows.offer(_compatibleRow1.clone());
    rows.offer(_compatibleRow2.clone());
    SelectionResults selectionResults = selectionOperatorService.renderSelectionResultsWithOrdering();
    List<Serializable[]> formattedRows = selectionResults.getRows();
    Serializable[] expectedFormattedRow1 = { "1", "2.0", "3.0", "4.0", "5", new String[] { "6" }, new String[] { "7.0" }, new String[] { "8.0" }, new String[] { "9.0" }, new String[] { "10" } };
    Serializable[] expectedFormattedRow2 = { "0", "1.0", "2.0", "3.0", "4", new String[] { "5" }, new String[] { "6.0" }, new String[] { "7.0" }, new String[] { "8.0" }, new String[] { "9" } };
    Assert.assertEquals(formattedRows.get(0), expectedFormattedRow1);
    Assert.assertEquals(formattedRows.get(1), expectedFormattedRow2);
}

Example 4 with SelectionResults

use of com.linkedin.pinot.common.response.broker.SelectionResults in project pinot by linkedin.

the class BrokerReduceService method reduceOnDataTable.

@Nonnull
@Override
public BrokerResponseNative reduceOnDataTable(@Nonnull BrokerRequest brokerRequest, @Nonnull Map<ServerInstance, DataTable> dataTableMap, @Nullable BrokerMetrics brokerMetrics) {
    if (dataTableMap.size() == 0) {
        // Empty response.
        return BrokerResponseNative.empty();
    }
    BrokerResponseNative brokerResponseNative = new BrokerResponseNative();
    List<QueryProcessingException> processingExceptions = brokerResponseNative.getProcessingExceptions();
    long numDocsScanned = 0L;
    long numEntriesScannedInFilter = 0L;
    long numEntriesScannedPostFilter = 0L;
    long numTotalRawDocs = 0L;
    // Cache a data schema from data tables (try to cache one with data rows associated with it).
    DataSchema cachedDataSchema = null;
    // Process server response metadata.
    Iterator<Map.Entry<ServerInstance, DataTable>> iterator = dataTableMap.entrySet().iterator();
    while (iterator.hasNext()) {
        Map.Entry<ServerInstance, DataTable> entry = iterator.next();
        ServerInstance serverInstance = entry.getKey();
        DataTable dataTable = entry.getValue();
        Map<String, String> metadata = dataTable.getMetadata();
        // Reduce on trace info.
        if (brokerRequest.isEnableTrace()) {
            brokerResponseNative.getTraceInfo().put(serverInstance.getHostname(), metadata.get(DataTable.TRACE_INFO_METADATA_KEY));
        }
        // Reduce on exceptions.
        for (String key : metadata.keySet()) {
            if (key.startsWith(DataTable.EXCEPTION_METADATA_KEY)) {
                processingExceptions.add(new QueryProcessingException(Integer.parseInt(key.substring(9)), metadata.get(key)));
            }
        }
        // Reduce on execution statistics.
        String numDocsScannedString = metadata.get(DataTable.NUM_DOCS_SCANNED_METADATA_KEY);
        if (numDocsScannedString != null) {
            numDocsScanned += Long.parseLong(numDocsScannedString);
        }
        String numEntriesScannedInFilterString = metadata.get(DataTable.NUM_ENTRIES_SCANNED_IN_FILTER_METADATA_KEY);
        if (numEntriesScannedInFilterString != null) {
            numEntriesScannedInFilter += Long.parseLong(numEntriesScannedInFilterString);
        }
        String numEntriesScannedPostFilterString = metadata.get(DataTable.NUM_ENTRIES_SCANNED_POST_FILTER_METADATA_KEY);
        if (numEntriesScannedPostFilterString != null) {
            numEntriesScannedPostFilter += Long.parseLong(numEntriesScannedPostFilterString);
        }
        String numTotalRawDocsString = metadata.get(DataTable.TOTAL_DOCS_METADATA_KEY);
        if (numTotalRawDocsString != null) {
            numTotalRawDocs += Long.parseLong(numTotalRawDocsString);
        }
        // After processing the metadata, remove data tables without data rows inside.
        DataSchema dataSchema = dataTable.getDataSchema();
        if (dataSchema == null) {
            iterator.remove();
        } else {
            // Try to cache a data table with data rows inside, or cache one with data schema inside.
            if (dataTable.getNumberOfRows() == 0) {
                if (cachedDataSchema == null) {
                    cachedDataSchema = dataSchema;
                }
                iterator.remove();
            } else {
                cachedDataSchema = dataSchema;
            }
        }
    }
    // Set execution statistics.
    brokerResponseNative.setNumDocsScanned(numDocsScanned);
    brokerResponseNative.setNumEntriesScannedInFilter(numEntriesScannedInFilter);
    brokerResponseNative.setNumEntriesScannedPostFilter(numEntriesScannedPostFilter);
    brokerResponseNative.setTotalDocs(numTotalRawDocs);
    // Update broker metrics.
    String tableName = brokerRequest.getQuerySource().getTableName();
    if (brokerMetrics != null) {
        brokerMetrics.addMeteredTableValue(tableName, BrokerMeter.DOCUMENTS_SCANNED, numDocsScanned);
        brokerMetrics.addMeteredTableValue(tableName, BrokerMeter.ENTRIES_SCANNED_IN_FILTER, numEntriesScannedInFilter);
        brokerMetrics.addMeteredTableValue(tableName, BrokerMeter.ENTRIES_SCANNED_POST_FILTER, numEntriesScannedPostFilter);
    }
    if (dataTableMap.isEmpty()) {
        // This will only happen to selection query.
        if (cachedDataSchema != null) {
            List<String> selectionColumns = SelectionOperatorUtils.getSelectionColumns(brokerRequest.getSelections().getSelectionColumns(), cachedDataSchema);
            brokerResponseNative.setSelectionResults(new SelectionResults(selectionColumns, new ArrayList<Serializable[]>(0)));
        }
    } else {
        // Reduce server responses data and set query results into the broker response.
        assert cachedDataSchema != null;
        if (brokerRequest.isSetSelections()) {
            // Selection query.
            // For data table map with more than one data tables, remove conflicting data tables.
            DataSchema masterDataSchema = cachedDataSchema.clone();
            if (dataTableMap.size() > 1) {
                List<String> droppedServers = removeConflictingResponses(masterDataSchema, dataTableMap);
                if (!droppedServers.isEmpty()) {
                    String errorMessage = QueryException.MERGE_RESPONSE_ERROR.getMessage() + ": responses for table: " + tableName + " from servers: " + droppedServers + " got dropped due to data schema inconsistency.";
                    LOGGER.error(errorMessage);
                    if (brokerMetrics != null) {
                        brokerMetrics.addMeteredTableValue(tableName, BrokerMeter.RESPONSE_MERGE_EXCEPTIONS, 1);
                    }
                    brokerResponseNative.addToExceptions(new QueryProcessingException(QueryException.MERGE_RESPONSE_ERROR_CODE, errorMessage));
                }
            }
            setSelectionResults(brokerResponseNative, brokerRequest.getSelections(), dataTableMap, masterDataSchema);
        } else {
            // Aggregation query.
            AggregationFunction[] aggregationFunctions = AggregationFunctionUtils.getAggregationFunctions(brokerRequest.getAggregationsInfo());
            if (!brokerRequest.isSetGroupBy()) {
                // Aggregation only query.
                setAggregationResults(brokerResponseNative, aggregationFunctions, dataTableMap, cachedDataSchema);
            } else {
                // Aggregation group-by query.
                setGroupByResults(brokerResponseNative, aggregationFunctions, brokerRequest.getGroupBy(), dataTableMap);
            }
        }
    }
    return brokerResponseNative;
}