Examples with Variable io.siddhi.query.api.expression.Variable used on opensource projects

Example 16 with Variable

use of io.siddhi.query.api.expression.Variable in project siddhi by wso2.

the class AbstractQueryableRecordTable method compileSelection.

public CompiledSelection compileSelection(Selector selector, List<Attribute> expectedOutputAttributes, MatchingMetaInfoHolder matchingMetaInfoHolder, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String, Table> tableMap, SiddhiQueryContext siddhiQueryContext) {
    selectorForTestOnDemandQuery = selector;
    siddhiQueryContextForTestOnDemandQuery = siddhiQueryContext;
    matchingMetaInfoHolderForTestOnDemandQuery = matchingMetaInfoHolder;
    List<OutputAttribute> outputAttributes = selector.getSelectionList();
    if (outputAttributes.size() == 0) {
        MetaStreamEvent metaStreamEvent = matchingMetaInfoHolder.getMetaStateEvent().getMetaStreamEvent(matchingMetaInfoHolder.getStoreEventIndex());
        List<Attribute> attributeList = metaStreamEvent.getLastInputDefinition().getAttributeList();
        for (Attribute attribute : attributeList) {
            outputAttributes.add(new OutputAttribute(new Variable(attribute.getName())));
        }
    }
    List<SelectAttributeBuilder> selectAttributeBuilders = new ArrayList<>(outputAttributes.size());
    for (OutputAttribute outputAttribute : outputAttributes) {
        ExpressionBuilder expressionBuilder = new ExpressionBuilder(outputAttribute.getExpression(), matchingMetaInfoHolder, variableExpressionExecutors, tableMap, null, null, siddhiQueryContext);
        selectAttributeBuilders.add(new SelectAttributeBuilder(expressionBuilder, outputAttribute.getRename()));
    }
    MatchingMetaInfoHolder metaInfoHolderAfterSelect = new MatchingMetaInfoHolder(matchingMetaInfoHolder.getMetaStateEvent(), matchingMetaInfoHolder.getMatchingStreamEventIndex(), matchingMetaInfoHolder.getStoreEventIndex(), matchingMetaInfoHolder.getMatchingStreamDefinition(), matchingMetaInfoHolder.getMatchingStreamDefinition(), matchingMetaInfoHolder.getCurrentState());
    List<ExpressionBuilder> groupByExpressionBuilders = null;
    if (selector.getGroupByList().size() != 0) {
        groupByExpressionBuilders = new ArrayList<>(outputAttributes.size());
        for (Variable variable : selector.getGroupByList()) {
            groupByExpressionBuilders.add(new ExpressionBuilder(variable, metaInfoHolderAfterSelect, variableExpressionExecutors, tableMap, null, null, siddhiQueryContext));
        }
    }
    ExpressionBuilder havingExpressionBuilder = null;
    if (selector.getHavingExpression() != null) {
        havingExpressionBuilder = new ExpressionBuilder(selector.getHavingExpression(), metaInfoHolderAfterSelect, variableExpressionExecutors, tableMap, null, null, siddhiQueryContext);
    }
    List<OrderByAttributeBuilder> orderByAttributeBuilders = null;
    if (selector.getOrderByList().size() != 0) {
        orderByAttributeBuilders = new ArrayList<>(selector.getOrderByList().size());
        for (OrderByAttribute orderByAttribute : selector.getOrderByList()) {
            ExpressionBuilder expressionBuilder = new ExpressionBuilder(orderByAttribute.getVariable(), metaInfoHolderAfterSelect, variableExpressionExecutors, tableMap, null, null, siddhiQueryContext);
            orderByAttributeBuilders.add(new OrderByAttributeBuilder(expressionBuilder, orderByAttribute.getOrder()));
        }
    }
    Long limit = null;
    Long offset = null;
    if (selector.getLimit() != null) {
        ExpressionExecutor expressionExecutor = ExpressionParser.parseExpression((Expression) selector.getLimit(), metaInfoHolderAfterSelect.getMetaStateEvent(), SiddhiConstants.HAVING_STATE, tableMap, variableExpressionExecutors, false, 0, ProcessingMode.BATCH, false, siddhiQueryContext);
        limit = ((Number) (((ConstantExpressionExecutor) expressionExecutor).getValue())).longValue();
        if (limit < 0) {
            throw new SiddhiAppCreationException("'limit' cannot have negative value, but found '" + limit + "'", selector, siddhiQueryContext.getSiddhiAppContext());
        }
    }
    if (selector.getOffset() != null) {
        ExpressionExecutor expressionExecutor = ExpressionParser.parseExpression((Expression) selector.getOffset(), metaInfoHolderAfterSelect.getMetaStateEvent(), SiddhiConstants.HAVING_STATE, tableMap, variableExpressionExecutors, false, 0, ProcessingMode.BATCH, false, siddhiQueryContext);
        offset = ((Number) (((ConstantExpressionExecutor) expressionExecutor).getValue())).longValue();
        if (offset < 0) {
            throw new SiddhiAppCreationException("'offset' cannot have negative value, but found '" + offset + "'", selector, siddhiQueryContext.getSiddhiAppContext());
        }
    }
    CompiledSelection compiledSelection = compileSelection(selectAttributeBuilders, groupByExpressionBuilders, havingExpressionBuilder, orderByAttributeBuilders, limit, offset);
    Map<String, ExpressionExecutor> expressionExecutorMap = new HashMap<>();
    if (selectAttributeBuilders.size() != 0) {
        for (SelectAttributeBuilder selectAttributeBuilder : selectAttributeBuilders) {
            expressionExecutorMap.putAll(selectAttributeBuilder.getExpressionBuilder().getVariableExpressionExecutorMap());
        }
    }
    if (groupByExpressionBuilders != null && groupByExpressionBuilders.size() != 0) {
        for (ExpressionBuilder groupByExpressionBuilder : groupByExpressionBuilders) {
            expressionExecutorMap.putAll(groupByExpressionBuilder.getVariableExpressionExecutorMap());
        }
    }
    if (havingExpressionBuilder != null) {
        expressionExecutorMap.putAll(havingExpressionBuilder.getVariableExpressionExecutorMap());
    }
    if (orderByAttributeBuilders != null && orderByAttributeBuilders.size() != 0) {
        for (OrderByAttributeBuilder orderByAttributeBuilder : orderByAttributeBuilders) {
            expressionExecutorMap.putAll(orderByAttributeBuilder.getExpressionBuilder().getVariableExpressionExecutorMap());
        }
    }
    if (cacheEnabled) {
        CompiledSelectionWithCache compiledSelectionWithCache;
        MetaStateEvent metaStateEventForCacheSelection = matchingMetaInfoHolder.getMetaStateEvent().clone();
        ReturnStream returnStream = new ReturnStream(OutputStream.OutputEventType.CURRENT_EVENTS);
        int metaPosition = SiddhiConstants.UNKNOWN_STATE;
        List<VariableExpressionExecutor> variableExpressionExecutorsForQuerySelector = new ArrayList<>();
        QuerySelector querySelector = SelectorParser.parse(selector, returnStream, metaStateEventForCacheSelection, tableMap, variableExpressionExecutorsForQuerySelector, metaPosition, ProcessingMode.BATCH, false, siddhiQueryContext);
        if (matchingMetaInfoHolder.getMetaStateEvent().getOutputDataAttributes().size() == 0) {
            for (MetaStateEventAttribute outputDataAttribute : metaStateEventForCacheSelection.getOutputDataAttributes()) {
                matchingMetaInfoHolder.getMetaStateEvent().addOutputDataAllowingDuplicate(outputDataAttribute);
            }
        }
        QueryParserHelper.updateVariablePosition(metaStateEventForCacheSelection, variableExpressionExecutorsForQuerySelector);
        querySelector.setEventPopulator(StateEventPopulatorFactory.constructEventPopulator(metaStateEventForCacheSelection));
        RecordStoreCompiledSelection recordStoreCompiledSelection = new RecordStoreCompiledSelection(expressionExecutorMap, compiledSelection);
        compiledSelectionWithCache = new CompiledSelectionWithCache(recordStoreCompiledSelection, querySelector, metaStateEventForCacheSelection, matchingMetaInfoHolder.getStoreEventIndex(), variableExpressionExecutorsForQuerySelector);
        return compiledSelectionWithCache;
    } else {
        return new RecordStoreCompiledSelection(expressionExecutorMap, compiledSelection);
    }
}

Example 17 with Variable

use of io.siddhi.query.api.expression.Variable in project siddhi by wso2.

the class AbstractQueryableRecordTable method generateCSForSelectAll.

private CompiledSelection generateCSForSelectAll() {
    MetaStreamEvent metaStreamEventForSelectAll = new MetaStreamEvent();
    for (Attribute attribute : tableDefinition.getAttributeList()) {
        metaStreamEventForSelectAll.addOutputData(attribute);
    }
    metaStreamEventForSelectAll.addInputDefinition(tableDefinition);
    MetaStateEvent metaStateEventForSelectAll = new MetaStateEvent(1);
    metaStateEventForSelectAll.addEvent(metaStreamEventForSelectAll);
    MatchingMetaInfoHolder matchingMetaInfoHolderForSlectAll = new MatchingMetaInfoHolder(metaStateEventForSelectAll, -1, 0, tableDefinition, tableDefinition, 0);
    List<OutputAttribute> outputAttributesAll = new ArrayList<>();
    List<Attribute> attributeList = tableDefinition.getAttributeList();
    for (Attribute attribute : attributeList) {
        outputAttributesAll.add(new OutputAttribute(new Variable(attribute.getName())));
    }
    List<SelectAttributeBuilder> selectAttributeBuilders = new ArrayList<>(outputAttributesAll.size());
    List<VariableExpressionExecutor> variableExpressionExecutors = new ArrayList<>();
    for (OutputAttribute outputAttribute : outputAttributesAll) {
        ExpressionBuilder expressionBuilder = new ExpressionBuilder(outputAttribute.getExpression(), matchingMetaInfoHolderForSlectAll, variableExpressionExecutors, tableMap, null, null, null);
        selectAttributeBuilders.add(new SelectAttributeBuilder(expressionBuilder, outputAttribute.getRename()));
    }
    return compileSelection(selectAttributeBuilders, null, null, null, null, null);
}

Example 18 with Variable

use of io.siddhi.query.api.expression.Variable in project siddhi by wso2.

the class CacheExpirer method generateExpiryCompiledCondition.

private CompiledCondition generateExpiryCompiledCondition() {
    MetaStreamEvent tableMetaStreamEvent = new MetaStreamEvent();
    tableMetaStreamEvent.setEventType(MetaStreamEvent.EventType.TABLE);
    TableDefinition matchingTableDefinition = TableDefinition.id(cacheTable.getTableDefinition().getId());
    for (Attribute attribute : cacheTable.getTableDefinition().getAttributeList()) {
        tableMetaStreamEvent.addOutputData(attribute);
        matchingTableDefinition.attribute(attribute.getName(), attribute.getType());
    }
    tableMetaStreamEvent.addInputDefinition(matchingTableDefinition);
    streamEventFactory = new StreamEventFactory(tableMetaStreamEvent);
    Variable rightExpressionForSubtract = new Variable(CACHE_TABLE_TIMESTAMP_ADDED);
    rightExpressionForSubtract.setStreamId(cacheTable.getTableDefinition().getId());
    Expression rightExpressionForCompare = new LongConstant(retentionPeriod);
    Compare.Operator greaterThanOperator = Compare.Operator.GREATER_THAN;
    MetaStreamEvent currentTimeMetaStreamEvent = new MetaStreamEvent();
    currentTimeMetaStreamEvent.setEventType(MetaStreamEvent.EventType.TABLE);
    Attribute currentTimeAttribute = new Attribute(CACHE_EXPIRE_CURRENT_TIME, Attribute.Type.LONG);
    currentTimeMetaStreamEvent.addOutputData(currentTimeAttribute);
    TableDefinition currentTimeTableDefinition = TableDefinition.id("");
    currentTimeTableDefinition.attribute(CACHE_EXPIRE_CURRENT_TIME, Attribute.Type.LONG);
    currentTimeMetaStreamEvent.addInputDefinition(currentTimeTableDefinition);
    MetaStateEvent metaStateEvent = new MetaStateEvent(2);
    metaStateEvent.addEvent(currentTimeMetaStreamEvent);
    metaStateEvent.addEvent(tableMetaStreamEvent);
    MatchingMetaInfoHolder matchingMetaInfoHolder = MatcherParser.constructMatchingMetaStateHolder(metaStateEvent, 0, cacheTable.getTableDefinition(), 0);
    List<VariableExpressionExecutor> variableExpressionExecutors = new ArrayList<>();
    Expression leftExpressionForSubtract = new Variable(CACHE_EXPIRE_CURRENT_TIME);
    Expression leftExpressionForCompare = new Subtract(leftExpressionForSubtract, rightExpressionForSubtract);
    Expression deleteCondition = new Compare(leftExpressionForCompare, greaterThanOperator, rightExpressionForCompare);
    SiddhiQueryContext siddhiQueryContext = new SiddhiQueryContext(siddhiAppContext, "expiryDeleteQuery");
    return cacheTable.compileCondition(deleteCondition, matchingMetaInfoHolder, variableExpressionExecutors, tableMap, siddhiQueryContext);
}

Example 19 with Variable

use of io.siddhi.query.api.expression.Variable in project siddhi by wso2.

the class IncrementalDataPurger method getOnDemandQuery.

private OnDemandQuery getOnDemandQuery(Table table, long timeFrom, long timeTo) {
    List<OutputAttribute> outputAttributes = new ArrayList<>();
    outputAttributes.add(new OutputAttribute(new Variable(AGG_START_TIMESTAMP_COL)));
    Selector selector = Selector.selector().addSelectionList(outputAttributes).groupBy(Expression.variable(AGG_START_TIMESTAMP_COL)).orderBy(Expression.variable(AGG_START_TIMESTAMP_COL), OrderByAttribute.Order.DESC).limit(Expression.value(1));
    InputStore inputStore;
    if (timeTo != 0) {
        inputStore = InputStore.store(table.getTableDefinition().getId()).on(Expression.and(Expression.compare(Expression.variable(AGG_START_TIMESTAMP_COL), Compare.Operator.GREATER_THAN_EQUAL, Expression.value(timeFrom)), Expression.compare(Expression.variable(AGG_START_TIMESTAMP_COL), Compare.Operator.LESS_THAN_EQUAL, Expression.value(timeTo))));
    } else {
        inputStore = InputStore.store(table.getTableDefinition().getId()).on(Expression.compare(Expression.variable(AGG_START_TIMESTAMP_COL), Compare.Operator.LESS_THAN_EQUAL, Expression.value(timeFrom)));
    }
    return OnDemandQuery.query().from(inputStore).select(selector);
}

Example 20 with Variable

use of io.siddhi.query.api.expression.Variable in project siddhi by wso2.

the class ExpressionParser method parseExpression.

/**
 * Parse the given expression and create the appropriate Executor by recursively traversing the expression
 *
 * @param expression                 Expression to be parsed
 * @param metaEvent                  Meta Event
 * @param currentState               Current state number
 * @param tableMap                   Event Table Map
 * @param executorList               List to hold VariableExpressionExecutors to update after query parsing
 * @param groupBy                    is for groupBy expression
 * @param defaultStreamEventIndex    Default StreamEvent Index
 * @param processingMode             processing mode of the query
 * @param outputExpectsExpiredEvents is expired events sent as output
 * @param siddhiQueryContext         current siddhi query context
 * @return ExpressionExecutor
 */
public static ExpressionExecutor parseExpression(Expression expression, MetaComplexEvent metaEvent, int currentState, Map<String, Table> tableMap, List<VariableExpressionExecutor> executorList, boolean groupBy, int defaultStreamEventIndex, ProcessingMode processingMode, boolean outputExpectsExpiredEvents, SiddhiQueryContext siddhiQueryContext) {
    try {
        if (expression instanceof And) {
            return new AndConditionExpressionExecutor(parseExpression(((And) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((And) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
        } else if (expression instanceof Or) {
            return new OrConditionExpressionExecutor(parseExpression(((Or) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Or) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
        } else if (expression instanceof Not) {
            return new NotConditionExpressionExecutor(parseExpression(((Not) expression).getExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
        } else if (expression instanceof Compare) {
            if (((Compare) expression).getOperator() == Compare.Operator.EQUAL) {
                Expression leftExpression = ((Compare) expression).getLeftExpression();
                Expression rightExpression = ((Compare) expression).getRightExpression();
                ExpressionExecutor leftExpressionExecutor = parseExpression(leftExpression, metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
                ExpressionExecutor rightExpressionExecutor = parseExpression(rightExpression, metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
                return parseEqualCompare(leftExpressionExecutor, rightExpressionExecutor);
            } else if (((Compare) expression).getOperator() == Compare.Operator.NOT_EQUAL) {
                return parseNotEqualCompare(parseExpression(((Compare) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Compare) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
            } else if (((Compare) expression).getOperator() == Compare.Operator.GREATER_THAN) {
                return parseGreaterThanCompare(parseExpression(((Compare) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Compare) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
            } else if (((Compare) expression).getOperator() == Compare.Operator.GREATER_THAN_EQUAL) {
                return parseGreaterThanEqualCompare(parseExpression(((Compare) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Compare) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
            } else if (((Compare) expression).getOperator() == Compare.Operator.LESS_THAN) {
                return parseLessThanCompare(parseExpression(((Compare) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Compare) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
            } else if (((Compare) expression).getOperator() == Compare.Operator.LESS_THAN_EQUAL) {
                return parseLessThanEqualCompare(parseExpression(((Compare) expression).getLeftExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext), parseExpression(((Compare) expression).getRightExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext));
            }
        } else if (expression instanceof Constant) {
            if (expression instanceof BoolConstant) {
                return new ConstantExpressionExecutor(((BoolConstant) expression).getValue(), Attribute.Type.BOOL);
            } else if (expression instanceof StringConstant) {
                return new ConstantExpressionExecutor(((StringConstant) expression).getValue(), Attribute.Type.STRING);
            } else if (expression instanceof IntConstant) {
                return new ConstantExpressionExecutor(((IntConstant) expression).getValue(), Attribute.Type.INT);
            } else if (expression instanceof LongConstant) {
                return new ConstantExpressionExecutor(((LongConstant) expression).getValue(), Attribute.Type.LONG);
            } else if (expression instanceof FloatConstant) {
                return new ConstantExpressionExecutor(((FloatConstant) expression).getValue(), Attribute.Type.FLOAT);
            } else if (expression instanceof DoubleConstant) {
                return new ConstantExpressionExecutor(((DoubleConstant) expression).getValue(), Attribute.Type.DOUBLE);
            }
        } else if (expression instanceof Variable) {
            return parseVariable((Variable) expression, metaEvent, currentState, executorList, defaultStreamEventIndex, siddhiQueryContext);
        } else if (expression instanceof Multiply) {
            ExpressionExecutor left = parseExpression(((Multiply) expression).getLeftValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            ExpressionExecutor right = parseExpression(((Multiply) expression).getRightValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            Attribute.Type type = parseArithmeticOperationResultType(left, right);
            switch(type) {
                case INT:
                    return new MultiplyExpressionExecutorInt(left, right);
                case LONG:
                    return new MultiplyExpressionExecutorLong(left, right);
                case FLOAT:
                    return new MultiplyExpressionExecutorFloat(left, right);
                case DOUBLE:
                    return new MultiplyExpressionExecutorDouble(left, right);
                // Will not happen. Handled in parseArithmeticOperationResultType()
                default:
            }
        } else if (expression instanceof Add) {
            ExpressionExecutor left = parseExpression(((Add) expression).getLeftValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            ExpressionExecutor right = parseExpression(((Add) expression).getRightValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            Attribute.Type type = parseArithmeticOperationResultType(left, right);
            switch(type) {
                case INT:
                    return new AddExpressionExecutorInt(left, right);
                case LONG:
                    return new AddExpressionExecutorLong(left, right);
                case FLOAT:
                    return new AddExpressionExecutorFloat(left, right);
                case DOUBLE:
                    return new AddExpressionExecutorDouble(left, right);
                // Will not happen. Handled in parseArithmeticOperationResultType()
                default:
            }
        } else if (expression instanceof Subtract) {
            ExpressionExecutor left = parseExpression(((Subtract) expression).getLeftValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            ExpressionExecutor right = parseExpression(((Subtract) expression).getRightValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            Attribute.Type type = parseArithmeticOperationResultType(left, right);
            switch(type) {
                case INT:
                    return new SubtractExpressionExecutorInt(left, right);
                case LONG:
                    return new SubtractExpressionExecutorLong(left, right);
                case FLOAT:
                    return new SubtractExpressionExecutorFloat(left, right);
                case DOUBLE:
                    return new SubtractExpressionExecutorDouble(left, right);
                // Will not happen. Handled in parseArithmeticOperationResultType()
                default:
            }
        } else if (expression instanceof Mod) {
            ExpressionExecutor left = parseExpression(((Mod) expression).getLeftValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            ExpressionExecutor right = parseExpression(((Mod) expression).getRightValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            Attribute.Type type = parseArithmeticOperationResultType(left, right);
            switch(type) {
                case INT:
                    return new ModExpressionExecutorInt(left, right);
                case LONG:
                    return new ModExpressionExecutorLong(left, right);
                case FLOAT:
                    return new ModExpressionExecutorFloat(left, right);
                case DOUBLE:
                    return new ModExpressionExecutorDouble(left, right);
                // Will not happen. Handled in parseArithmeticOperationResultType()
                default:
            }
        } else if (expression instanceof Divide) {
            ExpressionExecutor left = parseExpression(((Divide) expression).getLeftValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            ExpressionExecutor right = parseExpression(((Divide) expression).getRightValue(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
            Attribute.Type type = parseArithmeticOperationResultType(left, right);
            switch(type) {
                case INT:
                    return new DivideExpressionExecutorInt(left, right);
                case LONG:
                    return new DivideExpressionExecutorLong(left, right);
                case FLOAT:
                    return new DivideExpressionExecutorFloat(left, right);
                case DOUBLE:
                    return new DivideExpressionExecutorDouble(left, right);
                // Will not happen. Handled in parseArithmeticOperationResultType()
                default:
            }
        } else if (expression instanceof AttributeFunction) {
            // extensions
            Object executor;
            try {
                if ((siddhiQueryContext.getSiddhiAppContext().isFunctionExist(((AttributeFunction) expression).getName())) && (((AttributeFunction) expression).getNamespace()).isEmpty()) {
                    executor = new ScriptFunctionExecutor(((AttributeFunction) expression).getName());
                } else {
                    executor = SiddhiClassLoader.loadExtensionImplementation((AttributeFunction) expression, FunctionExecutorExtensionHolder.getInstance(siddhiQueryContext.getSiddhiAppContext()));
                }
            } catch (SiddhiAppCreationException ex) {
                try {
                    executor = SiddhiClassLoader.loadExtensionImplementation((AttributeFunction) expression, AttributeAggregatorExtensionHolder.getInstance(siddhiQueryContext.getSiddhiAppContext()));
                } catch (SiddhiAppCreationException e) {
                    throw new ExtensionNotFoundException("'" + ((AttributeFunction) expression).getName() + "' is" + " neither a function extension nor an aggregated attribute extension", expression.getQueryContextStartIndex(), expression.getQueryContextEndIndex());
                }
            }
            ConfigReader configReader = siddhiQueryContext.getSiddhiContext().getConfigManager().generateConfigReader(((AttributeFunction) expression).getNamespace(), ((AttributeFunction) expression).getName());
            if (executor instanceof FunctionExecutor) {
                FunctionExecutor expressionExecutor = (FunctionExecutor) executor;
                Expression[] innerExpressions = ((AttributeFunction) expression).getParameters();
                ExpressionExecutor[] innerExpressionExecutors = parseInnerExpression(innerExpressions, metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
                expressionExecutor.initExecutor(innerExpressionExecutors, processingMode, configReader, groupBy, siddhiQueryContext);
                if (expressionExecutor.getReturnType() == Attribute.Type.BOOL) {
                    return new BoolConditionExpressionExecutor(expressionExecutor);
                }
                return expressionExecutor;
            } else {
                AttributeAggregatorExecutor attributeAggregatorExecutor = (AttributeAggregatorExecutor) executor;
                Expression[] innerExpressions = ((AttributeFunction) expression).getParameters();
                ExpressionExecutor[] innerExpressionExecutors = parseInnerExpression(innerExpressions, metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
                attributeAggregatorExecutor.initAggregator(innerExpressionExecutors, processingMode, outputExpectsExpiredEvents, configReader, groupBy, siddhiQueryContext);
                // AbstractAggregationAttributeExecutor aggregationAttributeProcessor;
                // if (groupBy) {
                // aggregationAttributeProcessor = new GroupByAggregationAttributeExecutor(attributeAggregatorExecutor,
                // innerExpressionExecutors, configReader, siddhiQueryContext);
                // } else {
                // aggregationAttributeProcessor = new AggregationAttributeExecutor(attributeAggregatorExecutor,
                // innerExpressionExecutors, siddhiQueryContext);
                // }
                SelectorParser.getContainsAggregatorThreadLocal().set("true");
                return attributeAggregatorExecutor;
            }
        } else if (expression instanceof In) {
            Table table = tableMap.get(((In) expression).getSourceId());
            MatchingMetaInfoHolder matchingMetaInfoHolder = MatcherParser.constructMatchingMetaStateHolder(metaEvent, defaultStreamEventIndex, table.getTableDefinition(), defaultStreamEventIndex);
            CompiledCondition compiledCondition = table.compileCondition(((In) expression).getExpression(), matchingMetaInfoHolder, executorList, tableMap, siddhiQueryContext);
            return new InConditionExpressionExecutor(table, compiledCondition, matchingMetaInfoHolder.getMetaStateEvent().getMetaStreamEvents().length, metaEvent instanceof StateEvent, 0);
        } else if (expression instanceof IsNull) {
            IsNull isNull = (IsNull) expression;
            if (isNull.getExpression() != null) {
                ExpressionExecutor innerExpressionExecutor = parseExpression(isNull.getExpression(), metaEvent, currentState, tableMap, executorList, groupBy, defaultStreamEventIndex, processingMode, outputExpectsExpiredEvents, siddhiQueryContext);
                return new IsNullConditionExpressionExecutor(innerExpressionExecutor);
            } else {
                String streamId = isNull.getStreamId();
                Integer streamIndex = isNull.getStreamIndex();
                if (metaEvent instanceof MetaStateEvent) {
                    int[] eventPosition = new int[2];
                    if (streamIndex != null) {
                        if (streamIndex <= SiddhiConstants.LAST) {
                            eventPosition[SiddhiConstants.STREAM_EVENT_INDEX_IN_CHAIN] = streamIndex + 1;
                        } else {
                            eventPosition[SiddhiConstants.STREAM_EVENT_INDEX_IN_CHAIN] = streamIndex;
                        }
                    } else {
                        eventPosition[SiddhiConstants.STREAM_EVENT_INDEX_IN_CHAIN] = defaultStreamEventIndex;
                    }
                    eventPosition[SiddhiConstants.STREAM_EVENT_CHAIN_INDEX] = SiddhiConstants.UNKNOWN_STATE;
                    MetaStateEvent metaStateEvent = (MetaStateEvent) metaEvent;
                    if (streamId == null) {
                        throw new SiddhiAppCreationException("IsNull does not support streamId being null", expression.getQueryContextStartIndex(), expression.getQueryContextEndIndex());
                    } else {
                        MetaStreamEvent[] metaStreamEvents = metaStateEvent.getMetaStreamEvents();
                        for (int i = 0, metaStreamEventsLength = metaStreamEvents.length; i < metaStreamEventsLength; i++) {
                            MetaStreamEvent metaStreamEvent = metaStreamEvents[i];
                            AbstractDefinition definition = metaStreamEvent.getLastInputDefinition();
                            if (metaStreamEvent.getInputReferenceId() == null) {
                                if (definition.getId().equals(streamId)) {
                                    eventPosition[SiddhiConstants.STREAM_EVENT_CHAIN_INDEX] = i;
                                    break;
                                }
                            } else {
                                if (metaStreamEvent.getInputReferenceId().equals(streamId)) {
                                    eventPosition[SiddhiConstants.STREAM_EVENT_CHAIN_INDEX] = i;
                                    if (currentState > -1 && metaStreamEvents[currentState].getInputReferenceId() != null && streamIndex != null && streamIndex <= SiddhiConstants.LAST) {
                                        if (streamId.equals(metaStreamEvents[currentState].getInputReferenceId())) {
                                            eventPosition[SiddhiConstants.STREAM_EVENT_INDEX_IN_CHAIN] = streamIndex;
                                        }
                                    }
                                    break;
                                }
                            }
                        }
                    }
                    return new IsNullStreamConditionExpressionExecutor(eventPosition);
                } else {
                    return new IsNullStreamConditionExpressionExecutor(null);
                }
            }
        }
        throw new UnsupportedOperationException(expression.toString() + " not supported!");
    } catch (Throwable t) {
        ExceptionUtil.populateQueryContext(t, expression, siddhiQueryContext.getSiddhiAppContext(), siddhiQueryContext);
        throw t;
    }
}