Examples with RexLocalRef org.apache.calcite.rex.RexLocalRef used on opensource projects

Example 6 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class JoinProjectTransposeRule method onMatch.

// ~ Methods ----------------------------------------------------------------
// implement RelOptRule
public void onMatch(RelOptRuleCall call) {
    Join joinRel = call.rel(0);
    JoinRelType joinType = joinRel.getJoinType();
    Project leftProj;
    Project rightProj;
    RelNode leftJoinChild;
    RelNode rightJoinChild;
    // 2) input's projection doesn't generate nulls
    if (hasLeftChild(call) && (includeOuter || !joinType.generatesNullsOnLeft())) {
        leftProj = call.rel(1);
        leftJoinChild = getProjectChild(call, leftProj, true);
    } else {
        leftProj = null;
        leftJoinChild = call.rel(1);
    }
    if (hasRightChild(call) && (includeOuter || !joinType.generatesNullsOnRight())) {
        rightProj = getRightChild(call);
        rightJoinChild = getProjectChild(call, rightProj, false);
    } else {
        rightProj = null;
        rightJoinChild = joinRel.getRight();
    }
    if ((leftProj == null) && (rightProj == null)) {
        return;
    }
    // Construct two RexPrograms and combine them.  The bottom program
    // is a join of the projection expressions from the left and/or
    // right projects that feed into the join.  The top program contains
    // the join condition.
    // Create a row type representing a concatenation of the inputs
    // underneath the projects that feed into the join.  This is the input
    // into the bottom RexProgram.  Note that the join type is an inner
    // join because the inputs haven't actually been joined yet.
    RelDataType joinChildrenRowType = SqlValidatorUtil.deriveJoinRowType(leftJoinChild.getRowType(), rightJoinChild.getRowType(), JoinRelType.INNER, joinRel.getCluster().getTypeFactory(), null, Collections.<RelDataTypeField>emptyList());
    // Create projection expressions, combining the projection expressions
    // from the projects that feed into the join.  For the RHS projection
    // expressions, shift them to the right by the number of fields on
    // the LHS.  If the join input was not a projection, simply create
    // references to the inputs.
    int nProjExprs = joinRel.getRowType().getFieldCount();
    final List<Pair<RexNode, String>> projects = new ArrayList<>();
    final RexBuilder rexBuilder = joinRel.getCluster().getRexBuilder();
    createProjectExprs(leftProj, leftJoinChild, 0, rexBuilder, joinChildrenRowType.getFieldList(), projects);
    List<RelDataTypeField> leftFields = leftJoinChild.getRowType().getFieldList();
    int nFieldsLeft = leftFields.size();
    createProjectExprs(rightProj, rightJoinChild, nFieldsLeft, rexBuilder, joinChildrenRowType.getFieldList(), projects);
    final List<RelDataType> projTypes = new ArrayList<>();
    for (int i = 0; i < nProjExprs; i++) {
        projTypes.add(projects.get(i).left.getType());
    }
    RelDataType projRowType = rexBuilder.getTypeFactory().createStructType(projTypes, Pair.right(projects));
    // create the RexPrograms and merge them
    RexProgram bottomProgram = RexProgram.create(joinChildrenRowType, Pair.left(projects), null, projRowType, rexBuilder);
    RexProgramBuilder topProgramBuilder = new RexProgramBuilder(projRowType, rexBuilder);
    topProgramBuilder.addIdentity();
    topProgramBuilder.addCondition(joinRel.getCondition());
    RexProgram topProgram = topProgramBuilder.getProgram();
    RexProgram mergedProgram = RexProgramBuilder.mergePrograms(topProgram, bottomProgram, rexBuilder);
    // expand out the join condition and construct a new LogicalJoin that
    // directly references the join children without the intervening
    // ProjectRels
    RexNode newCondition = mergedProgram.expandLocalRef(mergedProgram.getCondition());
    Join newJoinRel = joinRel.copy(joinRel.getTraitSet(), newCondition, leftJoinChild, rightJoinChild, joinRel.getJoinType(), joinRel.isSemiJoinDone());
    // expand out the new projection expressions; if the join is an
    // outer join, modify the expressions to reference the join output
    final List<RexNode> newProjExprs = new ArrayList<>();
    List<RexLocalRef> projList = mergedProgram.getProjectList();
    List<RelDataTypeField> newJoinFields = newJoinRel.getRowType().getFieldList();
    int nJoinFields = newJoinFields.size();
    int[] adjustments = new int[nJoinFields];
    for (int i = 0; i < nProjExprs; i++) {
        RexNode newExpr = mergedProgram.expandLocalRef(projList.get(i));
        if (joinType != JoinRelType.INNER) {
            newExpr = newExpr.accept(new RelOptUtil.RexInputConverter(rexBuilder, joinChildrenRowType.getFieldList(), newJoinFields, adjustments));
        }
        newProjExprs.add(newExpr);
    }
    // finally, create the projection on top of the join
    final RelBuilder relBuilder = call.builder();
    relBuilder.push(newJoinRel);
    relBuilder.project(newProjExprs, joinRel.getRowType().getFieldNames());
    // projection to fix differences wrt nullability of fields
    if (joinType != JoinRelType.INNER) {
        relBuilder.convert(joinRel.getRowType(), false);
    }
    call.transformTo(relBuilder.build());
}

Example 7 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project calcite by apache.

the class RelOptUtil method permute.

/**
 * Creates a relational expression which permutes the output fields of a
 * relational expression according to a permutation.
 *
 * <p>Optimizations:</p>
 *
 * <ul>
 * <li>If the relational expression is a
 * {@link org.apache.calcite.rel.logical.LogicalCalc} or
 * {@link org.apache.calcite.rel.logical.LogicalProject} that is already
 * acting as a permutation, combines the new permutation with the old;</li>
 *
 * <li>If the permutation is the identity, returns the original relational
 * expression.</li>
 * </ul>
 *
 * <p>If a permutation is combined with its inverse, these optimizations
 * would combine to remove them both.
 *
 * @param rel         Relational expression
 * @param permutation Permutation to apply to fields
 * @param fieldNames  Field names; if null, or if a particular entry is null,
 *                    the name of the permuted field is used
 * @return relational expression which permutes its input fields
 */
public static RelNode permute(RelNode rel, Permutation permutation, List<String> fieldNames) {
    if (permutation.isIdentity()) {
        return rel;
    }
    if (rel instanceof LogicalCalc) {
        LogicalCalc calc = (LogicalCalc) rel;
        Permutation permutation1 = calc.getProgram().getPermutation();
        if (permutation1 != null) {
            Permutation permutation2 = permutation.product(permutation1);
            return permute(rel, permutation2, null);
        }
    }
    if (rel instanceof LogicalProject) {
        Permutation permutation1 = ((LogicalProject) rel).getPermutation();
        if (permutation1 != null) {
            Permutation permutation2 = permutation.product(permutation1);
            return permute(rel, permutation2, null);
        }
    }
    final List<RelDataType> outputTypeList = new ArrayList<>();
    final List<String> outputNameList = new ArrayList<>();
    final List<RexNode> exprList = new ArrayList<>();
    final List<RexLocalRef> projectRefList = new ArrayList<>();
    final List<RelDataTypeField> fields = rel.getRowType().getFieldList();
    final RelOptCluster cluster = rel.getCluster();
    for (int i = 0; i < permutation.getTargetCount(); i++) {
        int target = permutation.getTarget(i);
        final RelDataTypeField targetField = fields.get(target);
        outputTypeList.add(targetField.getType());
        outputNameList.add(((fieldNames == null) || (fieldNames.size() <= i) || (fieldNames.get(i) == null)) ? targetField.getName() : fieldNames.get(i));
        exprList.add(cluster.getRexBuilder().makeInputRef(fields.get(i).getType(), i));
        final int source = permutation.getSource(i);
        projectRefList.add(new RexLocalRef(source, fields.get(source).getType()));
    }
    final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
    final RexProgram program = new RexProgram(rel.getRowType(), exprList, projectRefList, null, typeFactory.createStructType(outputTypeList, outputNameList));
    return LogicalCalc.create(rel, program);
}

Example 8 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project storm by apache.

the class StreamsCalcRel method streamsPlan.

@Override
public void streamsPlan(StreamsPlanCreator planCreator) throws Exception {
    // SingleRel
    RelNode input = getInput();
    StormRelUtils.getStormRelInput(input).streamsPlan(planCreator);
    RelDataType inputRowType = getInput(0).getRowType();
    // filter
    ExecutableExpression filterInstance = null;
    RexLocalRef condition = program.getCondition();
    if (condition != null) {
        RexNode conditionNode = program.expandLocalRef(condition);
        filterInstance = planCreator.createScalarInstance(Lists.newArrayList(conditionNode), inputRowType, StormRelUtils.getClassName(this));
    }
    // projection
    ExecutableExpression projectionInstance = null;
    List<RexLocalRef> projectList = program.getProjectList();
    if (projectList != null && !projectList.isEmpty()) {
        List<RexNode> expandedNodes = new ArrayList<>();
        for (RexLocalRef project : projectList) {
            expandedNodes.add(program.expandLocalRef(project));
        }
        projectionInstance = planCreator.createScalarInstance(expandedNodes, inputRowType, StormRelUtils.getClassName(this));
    }
    if (projectionInstance == null && filterInstance == null) {
        // it shouldn't be happen
        throw new IllegalStateException("Either projection or condition, or both should be provided.");
    }
    List<String> outputFieldNames = getRowType().getFieldNames();
    int outputCount = outputFieldNames.size();
    EvaluationCalc evalCalc = new EvaluationCalc(filterInstance, projectionInstance, outputCount, planCreator.getDataContext());
    final Stream<Values> inputStream = planCreator.pop();
    final Stream finalStream = inputStream.flatMap(evalCalc);
    planCreator.addStream(finalStream);
}

Example 9 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project flink by apache.

the class WatermarkAssignerChangelogNormalizeTransposeRule method buildMapping.

private Mappings.TargetMapping buildMapping(RexProgram program) {
    final Map<Integer, Integer> mapInToOutPos = new HashMap<>();
    final List<RexLocalRef> projects = program.getProjectList();
    for (int idx = 0; idx < projects.size(); idx++) {
        RexNode rexNode = program.expandLocalRef(projects.get(idx));
        if (rexNode instanceof RexInputRef) {
            mapInToOutPos.put(((RexInputRef) rexNode).getIndex(), idx);
        }
    }
    return Mappings.target(mapInToOutPos, program.getInputRowType().getFieldCount(), program.getOutputRowType().getFieldCount());
}

Example 10 with RexLocalRef

use of org.apache.calcite.rex.RexLocalRef in project beam by apache.

the class BeamCalcRelType method canImplement.

@Override
protected boolean canImplement(RexCall call) {
    final SqlOperator operator = call.getOperator();
    RexImpTable.RexCallImplementor implementor = RexImpTable.INSTANCE.get(operator);
    if (implementor == null) {
        // Reject methods with no implementation
        return false;
    }
    if (operator instanceof SqlUserDefinedFunction) {
        SqlUserDefinedFunction udf = (SqlUserDefinedFunction) call.op;
        if (udf.function instanceof ZetaSqlScalarFunctionImpl) {
            ZetaSqlScalarFunctionImpl scalarFunction = (ZetaSqlScalarFunctionImpl) udf.function;
            if (!scalarFunction.functionGroup.equals(BeamZetaSqlCatalog.USER_DEFINED_JAVA_SCALAR_FUNCTIONS)) {
                // Reject ZetaSQL Builtin Scalar Functions
                return false;
            }
            for (RexNode operand : call.getOperands()) {
                if (operand instanceof RexLocalRef) {
                    if (!supportsType(operand.getType())) {
                        LOG.error("User-defined function {} received unsupported operand type {}.", call.op.getName(), ((RexLocalRef) operand).getType());
                        return false;
                    }
                } else {
                    LOG.error("User-defined function {} received unrecognized operand kind {}.", call.op.getName(), operand.getKind());
                    return false;
                }
            }
        } else {
            // Reject other UDFs
            return false;
        }
    } else {
        // Reject Calcite implementations
        return false;
    }
    return true;
}