Examples with ErrorCollector org.apache.drill.common.expression.ErrorCollector used on opensource projects

Example 16 with ErrorCollector

use of org.apache.drill.common.expression.ErrorCollector in project drill by apache.

the class MergingRecordBatch method generateComparisons.

private void generateComparisons(final ClassGenerator<?> g, final VectorAccessible batch) throws SchemaChangeException {
    g.setMappingSet(MAIN_MAPPING);
    for (final Ordering od : popConfig.getOrderings()) {
        // first, we rewrite the evaluation stack for each side of the comparison.
        final ErrorCollector collector = new ErrorCollectorImpl();
        final LogicalExpression expr = ExpressionTreeMaterializer.materialize(od.getExpr(), batch, collector, context.getFunctionRegistry());
        if (collector.hasErrors()) {
            throw new SchemaChangeException("Failure while materializing expression. " + collector.toErrorString());
        }
        g.setMappingSet(LEFT_MAPPING);
        final HoldingContainer left = g.addExpr(expr, ClassGenerator.BlkCreateMode.FALSE);
        g.setMappingSet(RIGHT_MAPPING);
        final HoldingContainer right = g.addExpr(expr, ClassGenerator.BlkCreateMode.FALSE);
        g.setMappingSet(MAIN_MAPPING);
        // next we wrap the two comparison sides and add the expression block for the comparison.
        final LogicalExpression fh = FunctionGenerationHelper.getOrderingComparator(od.nullsSortHigh(), left, right, context.getFunctionRegistry());
        final HoldingContainer out = g.addExpr(fh, ClassGenerator.BlkCreateMode.FALSE);
        final JConditional jc = g.getEvalBlock()._if(out.getValue().ne(JExpr.lit(0)));
        if (od.getDirection() == Direction.ASCENDING) {
            jc._then()._return(out.getValue());
        } else {
            jc._then()._return(out.getValue().minus());
        }
    }
    g.getEvalBlock()._return(JExpr.lit(0));
}

Example 17 with ErrorCollector

use of org.apache.drill.common.expression.ErrorCollector in project drill by apache.

the class ParquetGroupScan method applyFilter.

public GroupScan applyFilter(LogicalExpression filterExpr, UdfUtilities udfUtilities, FunctionImplementationRegistry functionImplementationRegistry, OptionManager optionManager) {
    if (fileSet.size() == 1 || !(parquetTableMetadata.isRowGroupPrunable()) || rowGroupInfos.size() > optionManager.getOption(PlannerSettings.PARQUET_ROWGROUP_FILTER_PUSHDOWN_PLANNING_THRESHOLD)) {
        //    -  # of row groups is beyond PARQUET_ROWGROUP_FILTER_PUSHDOWN_PLANNING_THRESHOLD.
        return null;
    }
    final Set<SchemaPath> schemaPathsInExpr = filterExpr.accept(new ParquetRGFilterEvaluator.FieldReferenceFinder(), null);
    final List<RowGroupMetadata> qualifiedRGs = new ArrayList<>(parquetTableMetadata.getFiles().size());
    // HashSet keeps a fileName unique.
    Set<String> qualifiedFileNames = Sets.newHashSet();
    ParquetFilterPredicate filterPredicate = null;
    for (ParquetFileMetadata file : parquetTableMetadata.getFiles()) {
        final ImplicitColumnExplorer columnExplorer = new ImplicitColumnExplorer(optionManager, this.columns);
        Map<String, String> implicitColValues = columnExplorer.populateImplicitColumns(file.getPath(), selectionRoot);
        for (RowGroupMetadata rowGroup : file.getRowGroups()) {
            ParquetMetaStatCollector statCollector = new ParquetMetaStatCollector(parquetTableMetadata, rowGroup.getColumns(), implicitColValues);
            Map<SchemaPath, ColumnStatistics> columnStatisticsMap = statCollector.collectColStat(schemaPathsInExpr);
            if (filterPredicate == null) {
                ErrorCollector errorCollector = new ErrorCollectorImpl();
                LogicalExpression materializedFilter = ExpressionTreeMaterializer.materializeFilterExpr(filterExpr, columnStatisticsMap, errorCollector, functionImplementationRegistry);
                if (errorCollector.hasErrors()) {
                    logger.error("{} error(s) encountered when materialize filter expression : {}", errorCollector.getErrorCount(), errorCollector.toErrorString());
                    return null;
                }
                //    logger.debug("materializedFilter : {}", ExpressionStringBuilder.toString(materializedFilter));
                Set<LogicalExpression> constantBoundaries = ConstantExpressionIdentifier.getConstantExpressionSet(materializedFilter);
                filterPredicate = (ParquetFilterPredicate) ParquetFilterBuilder.buildParquetFilterPredicate(materializedFilter, constantBoundaries, udfUtilities);
                if (filterPredicate == null) {
                    return null;
                }
            }
            if (ParquetRGFilterEvaluator.canDrop(filterPredicate, columnStatisticsMap, rowGroup.getRowCount())) {
                continue;
            }
            qualifiedRGs.add(rowGroup);
            // TODO : optimize when 1 file contains m row groups.
            qualifiedFileNames.add(file.getPath());
        }
    }
    if (qualifiedFileNames.size() == fileSet.size()) {
        // There is no reduction of rowGroups. Return the original groupScan.
        logger.debug("applyFilter does not have any pruning!");
        return null;
    } else if (qualifiedFileNames.size() == 0) {
        logger.warn("All rowgroups have been filtered out. Add back one to get schema from scannner");
        qualifiedFileNames.add(fileSet.iterator().next());
    }
    try {
        FileSelection newSelection = new FileSelection(null, Lists.newArrayList(qualifiedFileNames), getSelectionRoot(), cacheFileRoot, false);
        logger.info("applyFilter {} reduce parquet file # from {} to {}", ExpressionStringBuilder.toString(filterExpr), fileSet.size(), qualifiedFileNames.size());
        return this.clone(newSelection);
    } catch (IOException e) {
        logger.warn("Could not apply filter prune due to Exception : {}", e);
        return null;
    }
}

Example 18 with ErrorCollector

use of org.apache.drill.common.expression.ErrorCollector in project drill by apache.

the class ExpressionTest method getExpressionCode.

// HELPER METHODS //
private String getExpressionCode(String expression, RecordBatch batch) throws Exception {
    final LogicalExpression expr = parseExpr(expression);
    final ErrorCollector error = new ErrorCollectorImpl();
    final LogicalExpression materializedExpr = ExpressionTreeMaterializer.materialize(expr, batch, error, registry);
    if (error.getErrorCount() != 0) {
        logger.error("Failure while materializing expression [{}].  Errors: {}", expression, error);
        assertEquals(0, error.getErrorCount());
    }
    FunctionImplementationRegistry funcReg = new FunctionImplementationRegistry(DrillConfig.create());
    final ClassGenerator<Projector> cg = CodeGenerator.get(Projector.TEMPLATE_DEFINITION, funcReg, null).getRoot();
    cg.addExpr(new ValueVectorWriteExpression(new TypedFieldId(materializedExpr.getMajorType(), -1), materializedExpr));
    return cg.getCodeGenerator().generateAndGet();
}

Example 19 with ErrorCollector

use of org.apache.drill.common.expression.ErrorCollector in project drill by apache.

the class ExpressionTreeMaterializer method materializeAndCheckErrors.

public static LogicalExpression materializeAndCheckErrors(LogicalExpression expr, VectorAccessible batch, FunctionLookupContext functionLookupContext) throws SchemaChangeException {
    ErrorCollector collector = new ErrorCollectorImpl();
    LogicalExpression e = ExpressionTreeMaterializer.materialize(expr, batch, collector, functionLookupContext, false, false);
    if (collector.hasErrors()) {
        throw new SchemaChangeException(String.format("Failure while trying to materialize incoming schema.  Errors:\n %s.", collector.toErrorString()));
    }
    return e;
}

Example 20 with ErrorCollector

use of org.apache.drill.common.expression.ErrorCollector in project drill by apache.

the class FunctionGenerationHelper method getOrderingComparator.

/**
   * Finds ordering comparator ("compare_to...") FunctionHolderExpression with
   * a specified ordering for NULL (and considering NULLS <i>equal</i>).
   * @param  null_high  whether NULL should compare as the lowest value (if
   *                    {@code false}) or the highest value (if {@code true})
   * @param  left  ...
   * @param  right  ...
   * @param  registry  ...
   * @return
   *     FunctionHolderExpression containing the found function implementation
   */
public static LogicalExpression getOrderingComparator(boolean null_high, HoldingContainer left, HoldingContainer right, FunctionImplementationRegistry registry) {
    final String comparator_name = null_high ? COMPARE_TO_NULLS_HIGH : COMPARE_TO_NULLS_LOW;
    if (!isComparableType(left.getMajorType()) || !isComparableType(right.getMajorType())) {
        throw new UnsupportedOperationException(formatCanNotCompareMsg(left.getMajorType(), right.getMajorType()));
    }
    LogicalExpression comparisonFunctionExpression = getFunctionExpression(comparator_name, Types.required(MinorType.INT), registry, left, right);
    ErrorCollector collector = new ErrorCollectorImpl();
    if (!isUnionType(left.getMajorType()) && !isUnionType(right.getMajorType())) {
        return ExpressionTreeMaterializer.materialize(comparisonFunctionExpression, null, collector, registry);
    } else {
        LogicalExpression typeComparisonFunctionExpression = getTypeComparisonFunction(comparisonFunctionExpression, left, right);
        return ExpressionTreeMaterializer.materialize(typeComparisonFunctionExpression, null, collector, registry);
    }
}