Examples with SqlAggregator io.druid.sql.calcite.aggregation.SqlAggregator used on opensource projects

Example 1 with SqlAggregator

use of io.druid.sql.calcite.aggregation.SqlAggregator in project druid by druid-io.

the class GroupByRules method translateAggregateCall.

/**
   * Translate an AggregateCall to Druid equivalents.
   *
   * @return translated aggregation, or null if translation failed.
   */
private static Aggregation translateAggregateCall(final PlannerContext plannerContext, final RowSignature sourceRowSignature, final Project project, final AggregateCall call, final DruidOperatorTable operatorTable, final List<Aggregation> existingAggregations, final int aggNumber, final boolean approximateCountDistinct) {
    final List<DimFilter> filters = Lists.newArrayList();
    final List<String> rowOrder = sourceRowSignature.getRowOrder();
    final String name = aggOutputName(aggNumber);
    final SqlKind kind = call.getAggregation().getKind();
    final SqlTypeName outputType = call.getType().getSqlTypeName();
    if (call.filterArg >= 0) {
        // AGG(xxx) FILTER(WHERE yyy)
        if (project == null) {
            // We need some kind of projection to support filtered aggregations.
            return null;
        }
        final RexNode expression = project.getChildExps().get(call.filterArg);
        final DimFilter filter = Expressions.toFilter(operatorTable, plannerContext, sourceRowSignature, expression);
        if (filter == null) {
            return null;
        }
        filters.add(filter);
    }
    if (kind == SqlKind.COUNT && call.getArgList().isEmpty()) {
        // COUNT(*)
        return Aggregation.create(new CountAggregatorFactory(name)).filter(makeFilter(filters, sourceRowSignature));
    } else if (kind == SqlKind.COUNT && call.isDistinct()) {
        // COUNT(DISTINCT x)
        return approximateCountDistinct ? APPROX_COUNT_DISTINCT.toDruidAggregation(name, sourceRowSignature, operatorTable, plannerContext, existingAggregations, project, call, makeFilter(filters, sourceRowSignature)) : null;
    } else if (kind == SqlKind.COUNT || kind == SqlKind.SUM || kind == SqlKind.SUM0 || kind == SqlKind.MIN || kind == SqlKind.MAX || kind == SqlKind.AVG) {
        // Built-in agg, not distinct, not COUNT(*)
        boolean forceCount = false;
        final FieldOrExpression input;
        final int inputField = Iterables.getOnlyElement(call.getArgList());
        final RexNode rexNode = Expressions.fromFieldAccess(sourceRowSignature, project, inputField);
        final FieldOrExpression foe = FieldOrExpression.fromRexNode(operatorTable, plannerContext, rowOrder, rexNode);
        if (foe != null) {
            input = foe;
        } else if (rexNode.getKind() == SqlKind.CASE && ((RexCall) rexNode).getOperands().size() == 3) {
            // Possibly a CASE-style filtered aggregation. Styles supported:
            // A: SUM(CASE WHEN x = 'foo' THEN cnt END) => operands (x = 'foo', cnt, null)
            // B: SUM(CASE WHEN x = 'foo' THEN 1 ELSE 0 END) => operands (x = 'foo', 1, 0)
            // C: COUNT(CASE WHEN x = 'foo' THEN 'dummy' END) => operands (x = 'foo', 'dummy', null)
            // If the null and non-null args are switched, "flip" is set, which negates the filter.
            final RexCall caseCall = (RexCall) rexNode;
            final boolean flip = RexLiteral.isNullLiteral(caseCall.getOperands().get(1)) && !RexLiteral.isNullLiteral(caseCall.getOperands().get(2));
            final RexNode arg1 = caseCall.getOperands().get(flip ? 2 : 1);
            final RexNode arg2 = caseCall.getOperands().get(flip ? 1 : 2);
            // Operand 1: Filter
            final DimFilter filter = Expressions.toFilter(operatorTable, plannerContext, sourceRowSignature, caseCall.getOperands().get(0));
            if (filter == null) {
                return null;
            } else {
                filters.add(flip ? new NotDimFilter(filter) : filter);
            }
            if (call.getAggregation().getKind() == SqlKind.COUNT && arg1 instanceof RexLiteral && !RexLiteral.isNullLiteral(arg1) && RexLiteral.isNullLiteral(arg2)) {
                // Case C
                forceCount = true;
                input = null;
            } else if (call.getAggregation().getKind() == SqlKind.SUM && arg1 instanceof RexLiteral && ((Number) RexLiteral.value(arg1)).intValue() == 1 && arg2 instanceof RexLiteral && ((Number) RexLiteral.value(arg2)).intValue() == 0) {
                // Case B
                forceCount = true;
                input = null;
            } else if (RexLiteral.isNullLiteral(arg2)) {
                // Maybe case A
                input = FieldOrExpression.fromRexNode(operatorTable, plannerContext, rowOrder, arg1);
                if (input == null) {
                    return null;
                }
            } else {
                // Can't translate CASE into a filter.
                return null;
            }
        } else {
            // Can't translate operand.
            return null;
        }
        if (!forceCount) {
            Preconditions.checkNotNull(input, "WTF?! input was null for non-COUNT aggregation");
        }
        if (forceCount || kind == SqlKind.COUNT) {
            // COUNT(x)
            return Aggregation.create(new CountAggregatorFactory(name)).filter(makeFilter(filters, sourceRowSignature));
        } else {
            // Built-in aggregator that is not COUNT.
            final Aggregation retVal;
            final String fieldName = input.getFieldName();
            final String expression = input.getExpression();
            final boolean isLong = SqlTypeName.INT_TYPES.contains(outputType) || SqlTypeName.TIMESTAMP == outputType || SqlTypeName.DATE == outputType;
            if (kind == SqlKind.SUM || kind == SqlKind.SUM0) {
                retVal = isLong ? Aggregation.create(new LongSumAggregatorFactory(name, fieldName, expression)) : Aggregation.create(new DoubleSumAggregatorFactory(name, fieldName, expression));
            } else if (kind == SqlKind.MIN) {
                retVal = isLong ? Aggregation.create(new LongMinAggregatorFactory(name, fieldName, expression)) : Aggregation.create(new DoubleMinAggregatorFactory(name, fieldName, expression));
            } else if (kind == SqlKind.MAX) {
                retVal = isLong ? Aggregation.create(new LongMaxAggregatorFactory(name, fieldName, expression)) : Aggregation.create(new DoubleMaxAggregatorFactory(name, fieldName, expression));
            } else if (kind == SqlKind.AVG) {
                final String sumName = aggInternalName(aggNumber, "sum");
                final String countName = aggInternalName(aggNumber, "count");
                final AggregatorFactory sum = isLong ? new LongSumAggregatorFactory(sumName, fieldName, expression) : new DoubleSumAggregatorFactory(sumName, fieldName, expression);
                final AggregatorFactory count = new CountAggregatorFactory(countName);
                retVal = Aggregation.create(ImmutableList.of(sum, count), new ArithmeticPostAggregator(name, "quotient", ImmutableList.<PostAggregator>of(new FieldAccessPostAggregator(null, sumName), new FieldAccessPostAggregator(null, countName))));
            } else {
                // Not reached.
                throw new ISE("WTF?! Kind[%s] got into the built-in aggregator path somehow?!", kind);
            }
            return retVal.filter(makeFilter(filters, sourceRowSignature));
        }
    } else {
        // Not a built-in aggregator, check operator table.
        final SqlAggregator sqlAggregator = operatorTable.lookupAggregator(call.getAggregation().getName());
        return sqlAggregator != null ? sqlAggregator.toDruidAggregation(name, sourceRowSignature, operatorTable, plannerContext, existingAggregations, project, call, makeFilter(filters, sourceRowSignature)) : null;
    }
}

Example 2 with SqlAggregator

use of io.druid.sql.calcite.aggregation.SqlAggregator in project druid by druid-io.

the class DruidOperatorTable method lookupOperatorOverloads.

@Override
public void lookupOperatorOverloads(final SqlIdentifier opName, final SqlFunctionCategory category, final SqlSyntax syntax, final List<SqlOperator> operatorList) {
    if (opName.names.size() == 1 && syntax == SqlSyntax.FUNCTION) {
        final SqlAggregator aggregator = aggregators.get(opName.getSimple().toLowerCase());
        if (aggregator != null) {
            operatorList.add(aggregator.calciteFunction());
        }
        final SqlExtractionOperator extractionFunction = extractionOperators.get(opName.getSimple().toLowerCase());
        if (extractionFunction != null) {
            operatorList.add(extractionFunction.calciteFunction());
        }
    }
    STANDARD_TABLE.lookupOperatorOverloads(opName, category, syntax, operatorList);
}

Example 3 with SqlAggregator

use of io.druid.sql.calcite.aggregation.SqlAggregator in project druid by druid-io.

the class CalciteTests method createOperatorTable.

public static DruidOperatorTable createOperatorTable() {
    try {
        final Injector injector = Guice.createInjector(new Module() {

            @Override
            public void configure(final Binder binder) {
                // This Module is just to get a LookupReferencesManager with a usable "lookyloo" lookup.
                final LookupReferencesManager mock = EasyMock.createMock(LookupReferencesManager.class);
                EasyMock.expect(mock.get(EasyMock.eq("lookyloo"))).andReturn(new LookupExtractorFactory() {

                    @Override
                    public boolean start() {
                        throw new UnsupportedOperationException();
                    }

                    @Override
                    public boolean close() {
                        throw new UnsupportedOperationException();
                    }

                    @Override
                    public boolean replaces(@Nullable final LookupExtractorFactory other) {
                        throw new UnsupportedOperationException();
                    }

                    @Nullable
                    @Override
                    public LookupIntrospectHandler getIntrospectHandler() {
                        throw new UnsupportedOperationException();
                    }

                    @Override
                    public LookupExtractor get() {
                        return new MapLookupExtractor(ImmutableMap.of("a", "xa", "abc", "xabc"), false);
                    }
                }).anyTimes();
                EasyMock.replay(mock);
                binder.bind(LookupReferencesManager.class).toInstance(mock);
            }
        });
        final Set<SqlAggregator> aggregators = new HashSet<>();
        final Set<SqlExtractionOperator> extractionOperators = new HashSet<>();
        for (Class<? extends SqlAggregator> clazz : SqlModule.DEFAULT_AGGREGATOR_CLASSES) {
            aggregators.add(injector.getInstance(clazz));
        }
        for (Class<? extends SqlExtractionOperator> clazz : SqlModule.DEFAULT_EXTRACTION_OPERATOR_CLASSES) {
            extractionOperators.add(injector.getInstance(clazz));
        }
        return new DruidOperatorTable(aggregators, extractionOperators);
    } catch (Exception e) {
        throw Throwables.propagate(e);
    }
}

Example 4 with SqlAggregator

use of io.druid.sql.calcite.aggregation.SqlAggregator in project druid by druid-io.

the class DruidOperatorTable method getOperatorList.

@Override
public List<SqlOperator> getOperatorList() {
    final List<SqlOperator> retVal = new ArrayList<>();
    for (SqlAggregator aggregator : aggregators.values()) {
        retVal.add(aggregator.calciteFunction());
    }
    for (SqlExtractionOperator extractionFunction : extractionOperators.values()) {
        retVal.add(extractionFunction.calciteFunction());
    }
    retVal.addAll(STANDARD_TABLE.getOperatorList());
    return retVal;
}