Examples with VariableReferenceExpression org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression used on opensource projects

Example 91 with VariableReferenceExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression in project asterixdb by apache.

the class InlineAllNtsInSubplanVisitor method visitAssignOperator.

@Override
public ILogicalOperator visitAssignOperator(AssignOperator op, Void arg) throws AlgebricksException {
    visitSingleInputOperator(op);
    List<Mutable<ILogicalExpression>> assignedExprRefs = op.getExpressions();
    List<LogicalVariable> assignedVars = op.getVariables();
    // VariableReferenceExpressions.
    for (int index = 0; index < assignedVars.size(); ++index) {
        ILogicalExpression expr = assignedExprRefs.get(index).getValue();
        if (expr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
            VariableReferenceExpression varExpr = (VariableReferenceExpression) expr;
            LogicalVariable sourceVar = varExpr.getVariableReference();
            updateInputToOutputVarMapping(sourceVar, assignedVars.get(index), false);
        }
    }
    return op;
}

Example 92 with VariableReferenceExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression in project asterixdb by apache.

the class LangExpressionToPlanTranslator method visit.

@Override
public Pair<ILogicalOperator, LogicalVariable> visit(CallExpr fcall, Mutable<ILogicalOperator> tupSource) throws CompilationException {
    LogicalVariable v = context.newVar();
    FunctionSignature signature = fcall.getFunctionSignature();
    List<Mutable<ILogicalExpression>> args = new ArrayList<>();
    Mutable<ILogicalOperator> topOp = tupSource;
    for (Expression expr : fcall.getExprList()) {
        switch(expr.getKind()) {
            case VARIABLE_EXPRESSION:
                LogicalVariable var = context.getVar(((VariableExpr) expr).getVar().getId());
                args.add(new MutableObject<>(new VariableReferenceExpression(var)));
                break;
            case LITERAL_EXPRESSION:
                LiteralExpr val = (LiteralExpr) expr;
                args.add(new MutableObject<>(new ConstantExpression(new AsterixConstantValue(ConstantHelper.objectFromLiteral(val.getValue())))));
                break;
            default:
                Pair<ILogicalExpression, Mutable<ILogicalOperator>> eo = langExprToAlgExpression(expr, topOp);
                AbstractLogicalOperator o1 = (AbstractLogicalOperator) eo.second.getValue();
                args.add(new MutableObject<>(eo.first));
                if (o1 != null && !(o1.getOperatorTag() == LogicalOperatorTag.ASSIGN && hasOnlyChild(o1, topOp))) {
                    topOp = eo.second;
                }
                break;
        }
    }
    AbstractFunctionCallExpression f;
    if ((f = lookupUserDefinedFunction(signature, args)) == null) {
        f = lookupBuiltinFunction(signature.getName(), signature.getArity(), args);
    }
    if (f == null) {
        throw new CompilationException(" Unknown function " + signature.getName() + "@" + signature.getArity());
    }
    // Put hints into function call expr.
    if (fcall.hasHints()) {
        for (IExpressionAnnotation hint : fcall.getHints()) {
            f.getAnnotations().put(hint, hint);
        }
    }
    AssignOperator op = new AssignOperator(v, new MutableObject<>(f));
    if (topOp != null) {
        op.getInputs().add(topOp);
    }
    return new Pair<>(op, v);
}

Example 93 with VariableReferenceExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression in project asterixdb by apache.

the class LangExpressionToPlanTranslator method translateUpsert.

private ILogicalOperator translateUpsert(DatasetDataSource targetDatasource, Mutable<ILogicalExpression> varRef, List<Mutable<ILogicalExpression>> varRefsForLoading, List<Mutable<ILogicalExpression>> additionalFilteringExpressions, ILogicalOperator assign, List<String> additionalFilteringField, LogicalVariable unnestVar, ILogicalOperator topOp, List<Mutable<ILogicalExpression>> exprs, LogicalVariable resVar, AssignOperator additionalFilteringAssign, ICompiledDmlStatement stmt) throws AlgebricksException {
    if (!targetDatasource.getDataset().allow(topOp, DatasetUtil.OP_UPSERT)) {
        throw new AlgebricksException(targetDatasource.getDataset().getDatasetName() + ": upsert into dataset is not supported on Datasets with Meta records");
    }
    ProjectOperator project = (ProjectOperator) topOp;
    CompiledUpsertStatement compiledUpsert = (CompiledUpsertStatement) stmt;
    Expression returnExpression = compiledUpsert.getReturnExpression();
    InsertDeleteUpsertOperator upsertOp;
    ILogicalOperator rootOperator;
    if (targetDatasource.getDataset().hasMetaPart()) {
        if (returnExpression != null) {
            throw new AlgebricksException("Returning not allowed on datasets with Meta records");
        }
        AssignOperator metaAndKeysAssign;
        List<LogicalVariable> metaAndKeysVars;
        List<Mutable<ILogicalExpression>> metaAndKeysExprs;
        List<Mutable<ILogicalExpression>> metaExpSingletonList;
        metaAndKeysVars = new ArrayList<>();
        metaAndKeysExprs = new ArrayList<>();
        // add the meta function
        IFunctionInfo finfoMeta = FunctionUtil.getFunctionInfo(BuiltinFunctions.META);
        ScalarFunctionCallExpression metaFunction = new ScalarFunctionCallExpression(finfoMeta, new MutableObject<>(new VariableReferenceExpression(unnestVar)));
        // create assign for the meta part
        LogicalVariable metaVar = context.newVar();
        metaExpSingletonList = new ArrayList<>(1);
        metaExpSingletonList.add(new MutableObject<>(new VariableReferenceExpression(metaVar)));
        metaAndKeysVars.add(metaVar);
        metaAndKeysExprs.add(new MutableObject<>(metaFunction));
        project.getVariables().add(metaVar);
        varRefsForLoading.clear();
        for (Mutable<ILogicalExpression> assignExpr : exprs) {
            if (assignExpr.getValue().getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
                AbstractFunctionCallExpression funcCall = (AbstractFunctionCallExpression) assignExpr.getValue();
                funcCall.substituteVar(resVar, unnestVar);
                LogicalVariable pkVar = context.newVar();
                metaAndKeysVars.add(pkVar);
                metaAndKeysExprs.add(new MutableObject<>(assignExpr.getValue()));
                project.getVariables().add(pkVar);
                varRefsForLoading.add(new MutableObject<>(new VariableReferenceExpression(pkVar)));
            }
        }
        // A change feed, we don't need the assign to access PKs
        upsertOp = new InsertDeleteUpsertOperator(targetDatasource, varRef, varRefsForLoading, metaExpSingletonList, InsertDeleteUpsertOperator.Kind.UPSERT, false);
        // Create and add a new variable used for representing the original record
        upsertOp.setPrevRecordVar(context.newVar());
        upsertOp.setPrevRecordType(targetDatasource.getItemType());
        if (targetDatasource.getDataset().hasMetaPart()) {
            List<LogicalVariable> metaVars = new ArrayList<>();
            metaVars.add(context.newVar());
            upsertOp.setPrevAdditionalNonFilteringVars(metaVars);
            List<Object> metaTypes = new ArrayList<>();
            metaTypes.add(targetDatasource.getMetaItemType());
            upsertOp.setPrevAdditionalNonFilteringTypes(metaTypes);
        }
        if (additionalFilteringField != null) {
            upsertOp.setPrevFilterVar(context.newVar());
            upsertOp.setPrevFilterType(((ARecordType) targetDatasource.getItemType()).getFieldType(additionalFilteringField.get(0)));
            additionalFilteringAssign.getInputs().clear();
            additionalFilteringAssign.getInputs().add(assign.getInputs().get(0));
            upsertOp.getInputs().add(new MutableObject<>(additionalFilteringAssign));
        } else {
            upsertOp.getInputs().add(assign.getInputs().get(0));
        }
        metaAndKeysAssign = new AssignOperator(metaAndKeysVars, metaAndKeysExprs);
        metaAndKeysAssign.getInputs().add(topOp.getInputs().get(0));
        topOp.getInputs().set(0, new MutableObject<>(metaAndKeysAssign));
        upsertOp.setAdditionalFilteringExpressions(additionalFilteringExpressions);
    } else {
        upsertOp = new InsertDeleteUpsertOperator(targetDatasource, varRef, varRefsForLoading, InsertDeleteUpsertOperator.Kind.UPSERT, false);
        upsertOp.setAdditionalFilteringExpressions(additionalFilteringExpressions);
        upsertOp.getInputs().add(new MutableObject<>(assign));
        // Create and add a new variable used for representing the original record
        ARecordType recordType = (ARecordType) targetDatasource.getItemType();
        upsertOp.setPrevRecordVar(context.newVar());
        upsertOp.setPrevRecordType(recordType);
        if (additionalFilteringField != null) {
            upsertOp.setPrevFilterVar(context.newVar());
            upsertOp.setPrevFilterType(recordType.getFieldType(additionalFilteringField.get(0)));
        }
    }
    rootOperator = new DelegateOperator(new CommitOperator(returnExpression == null));
    rootOperator.getInputs().add(new MutableObject<>(upsertOp));
    // Compiles the return expression.
    return processReturningExpression(rootOperator, upsertOp, compiledUpsert);
}

Example 94 with VariableReferenceExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression in project asterixdb by apache.

the class LangExpressionToPlanTranslator method langExprToAlgExpression.

protected Pair<ILogicalExpression, Mutable<ILogicalOperator>> langExprToAlgExpression(Expression expr, Mutable<ILogicalOperator> topOpRef) throws CompilationException {
    switch(expr.getKind()) {
        case VARIABLE_EXPRESSION:
            VariableReferenceExpression ve = new VariableReferenceExpression(context.getVar(((VariableExpr) expr).getVar().getId()));
            return new Pair<>(ve, topOpRef);
        case LITERAL_EXPRESSION:
            LiteralExpr val = (LiteralExpr) expr;
            return new Pair<>(new ConstantExpression(new AsterixConstantValue(ConstantHelper.objectFromLiteral(val.getValue()))), topOpRef);
        default:
            if (expressionNeedsNoNesting(expr)) {
                Pair<ILogicalOperator, LogicalVariable> p = expr.accept(this, topOpRef);
                ILogicalExpression exp = ((AssignOperator) p.first).getExpressions().get(0).getValue();
                return new Pair<>(exp, p.first.getInputs().get(0));
            } else {
                Mutable<ILogicalOperator> srcRef = new MutableObject<>();
                Pair<ILogicalOperator, LogicalVariable> p = expr.accept(this, srcRef);
                if (p.first.getOperatorTag() == LogicalOperatorTag.SUBPLAN) {
                    if (topOpRef.getValue() != null) {
                        srcRef.setValue(topOpRef.getValue());
                    } else {
                        // Re-binds the bottom operator reference to {@code topOpRef}.
                        rebindBottomOpRef(p.first, srcRef, topOpRef);
                    }
                    Mutable<ILogicalOperator> top2 = new MutableObject<>(p.first);
                    return new Pair<>(new VariableReferenceExpression(p.second), top2);
                } else {
                    SubplanOperator s = new SubplanOperator();
                    s.getInputs().add(topOpRef);
                    srcRef.setValue(new NestedTupleSourceOperator(new MutableObject<>(s)));
                    Mutable<ILogicalOperator> planRoot = new MutableObject<>(p.first);
                    s.setRootOp(planRoot);
                    return new Pair<>(new VariableReferenceExpression(p.second), new MutableObject<>(s));
                }
            }
    }
}

Example 95 with VariableReferenceExpression

use of org.apache.hyracks.algebricks.core.algebra.expressions.VariableReferenceExpression in project asterixdb by apache.

the class AqlExpressionToPlanTranslator method produceFlworPlan.

private Pair<ILogicalOperator, LogicalVariable> produceFlworPlan(boolean noForClause, boolean isTop, Mutable<ILogicalOperator> resOpRef, LogicalVariable resVar) {
    if (isTop) {
        ProjectOperator pr = new ProjectOperator(resVar);
        pr.getInputs().add(resOpRef);
        return new Pair<>(pr, resVar);
    } else if (noForClause) {
        ILogicalOperator resOp = resOpRef.getValue();
        if (resOp.getOperatorTag() == LogicalOperatorTag.ASSIGN) {
            return new Pair<>(resOp, resVar);
        }
        LogicalVariable newResVar = context.newVar();
        ILogicalOperator assign = new AssignOperator(newResVar, new MutableObject<>(new VariableReferenceExpression(resVar)));
        assign.getInputs().add(resOpRef);
        return new Pair<>(assign, newResVar);
    } else {
        return aggListifyForSubquery(resVar, resOpRef, false);
    }
}