Examples with DimFilter io.druid.query.filter.DimFilter used on opensource projects

Example 6 with DimFilter

use of io.druid.query.filter.DimFilter in project druid by druid-io.

the class DumpSegment method runDump.

private void runDump(final Injector injector, final QueryableIndex index) throws IOException {
    final ObjectMapper objectMapper = injector.getInstance(Key.get(ObjectMapper.class, Json.class));
    final QueryableIndexStorageAdapter adapter = new QueryableIndexStorageAdapter(index);
    final List<String> columnNames = getColumnsToInclude(index);
    final DimFilter filter = filterJson != null ? objectMapper.readValue(filterJson, DimFilter.class) : null;
    final Sequence<Cursor> cursors = adapter.makeCursors(Filters.toFilter(filter), index.getDataInterval().withChronology(ISOChronology.getInstanceUTC()), VirtualColumns.EMPTY, Granularities.ALL, false);
    withOutputStream(new Function<OutputStream, Object>() {

        @Override
        public Object apply(final OutputStream out) {
            final Sequence<Object> sequence = Sequences.map(cursors, new Function<Cursor, Object>() {

                @Override
                public Object apply(Cursor cursor) {
                    final List<ObjectColumnSelector> selectors = Lists.newArrayList();
                    for (String columnName : columnNames) {
                        selectors.add(makeSelector(columnName, index.getColumn(columnName), cursor));
                    }
                    while (!cursor.isDone()) {
                        final Map<String, Object> row = Maps.newLinkedHashMap();
                        for (int i = 0; i < columnNames.size(); i++) {
                            final String columnName = columnNames.get(i);
                            final Object value = selectors.get(i).get();
                            if (timeISO8601 && columnNames.get(i).equals(Column.TIME_COLUMN_NAME)) {
                                row.put(columnName, new DateTime(value, DateTimeZone.UTC).toString());
                            } else {
                                row.put(columnName, value);
                            }
                        }
                        try {
                            out.write(objectMapper.writeValueAsBytes(row));
                            out.write('\n');
                        } catch (IOException e) {
                            throw Throwables.propagate(e);
                        }
                        cursor.advance();
                    }
                    return null;
                }
            });
            evaluateSequenceForSideEffects(sequence);
            return null;
        }
    });
}

Example 7 with DimFilter

use of io.druid.query.filter.DimFilter in project druid by druid-io.

the class DruidFilterRule method onMatch.

@Override
public void onMatch(RelOptRuleCall call) {
    final Filter filter = call.rel(0);
    final DruidRel druidRel = call.rel(1);
    if (druidRel.getQueryBuilder().getFilter() != null || druidRel.getQueryBuilder().getSelectProjection() != null || druidRel.getQueryBuilder().getGrouping() != null) {
        return;
    }
    final DimFilter dimFilter = Expressions.toFilter(operatorTable, druidRel.getPlannerContext(), druidRel.getSourceRowSignature(), filter.getCondition());
    if (dimFilter != null) {
        call.transformTo(druidRel.withQueryBuilder(druidRel.getQueryBuilder().withFilter(dimFilter)));
    }
}

Example 8 with DimFilter

use of io.druid.query.filter.DimFilter 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 9 with DimFilter

use of io.druid.query.filter.DimFilter in project druid by druid-io.

the class Expressions method toFilter.

/**
   * Translates "condition" to a Druid filter, or returns null if we cannot translate the condition.
   *
   * @param plannerContext planner context
   * @param rowSignature   row signature of the dataSource to be filtered
   * @param expression     Calcite row expression
   */
public static DimFilter toFilter(final DruidOperatorTable operatorTable, final PlannerContext plannerContext, final RowSignature rowSignature, final RexNode expression) {
    if (expression.getKind() == SqlKind.AND || expression.getKind() == SqlKind.OR || expression.getKind() == SqlKind.NOT) {
        final List<DimFilter> filters = Lists.newArrayList();
        for (final RexNode rexNode : ((RexCall) expression).getOperands()) {
            final DimFilter nextFilter = toFilter(operatorTable, plannerContext, rowSignature, rexNode);
            if (nextFilter == null) {
                return null;
            }
            filters.add(nextFilter);
        }
        if (expression.getKind() == SqlKind.AND) {
            return new AndDimFilter(filters);
        } else if (expression.getKind() == SqlKind.OR) {
            return new OrDimFilter(filters);
        } else {
            assert expression.getKind() == SqlKind.NOT;
            return new NotDimFilter(Iterables.getOnlyElement(filters));
        }
    } else {
        // Handle filter conditions on everything else.
        return toLeafFilter(operatorTable, plannerContext, rowSignature, expression);
    }
}

Example 10 with DimFilter

use of io.druid.query.filter.DimFilter in project druid by druid-io.

the class CombineAndSimplifyBounds method process.

@Override
public DimFilter process(DimFilter filter) {
    if (filter instanceof AndDimFilter) {
        final List<DimFilter> children = getAndFilterChildren((AndDimFilter) filter);
        final DimFilter one = doSimplifyAnd(children);
        final DimFilter two = negate(doSimplifyOr(negateAll(children)));
        return computeCost(one) <= computeCost(two) ? one : two;
    } else if (filter instanceof OrDimFilter) {
        final List<DimFilter> children = getOrFilterChildren((OrDimFilter) filter);
        final DimFilter one = doSimplifyOr(children);
        final DimFilter two = negate(doSimplifyAnd(negateAll(children)));
        return computeCost(one) <= computeCost(two) ? one : two;
    } else if (filter instanceof NotDimFilter) {
        final DimFilter field = ((NotDimFilter) filter).getField();
        final DimFilter candidate;
        if (field instanceof OrDimFilter) {
            candidate = doSimplifyAnd(negateAll(getOrFilterChildren((OrDimFilter) field)));
        } else if (field instanceof AndDimFilter) {
            candidate = doSimplifyOr(negateAll(getAndFilterChildren((AndDimFilter) field)));
        } else {
            candidate = negate(field);
        }
        return computeCost(filter) <= computeCost(candidate) ? filter : candidate;
    } else {
        return filter;
    }
}