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

Example 16 with RexProgramBuilder

use of org.apache.calcite.rex.RexProgramBuilder in project apex-malhar by apache.

the class ExpressionCompiler method getExpression.

/**
 * Create quasi-Java expression from given {@link RexNode}
 *
 * @param node Expression in the form of {@link RexNode}
 * @param inputRowType Input Data type to expression in the form of {@link RelDataType}
 * @param outputRowType Output data type of expression in the form of {@link RelDataType}
 *
 * @return Returns quasi-Java expression
 */
public String getExpression(RexNode node, RelDataType inputRowType, RelDataType outputRowType) {
    final RexProgramBuilder programBuilder = new RexProgramBuilder(inputRowType, rexBuilder);
    programBuilder.addProject(node, null);
    final RexProgram program = programBuilder.getProgram();
    final BlockBuilder builder = new BlockBuilder();
    final JavaTypeFactory javaTypeFactory = (JavaTypeFactory) rexBuilder.getTypeFactory();
    final RexToLixTranslator.InputGetter inputGetter = new RexToLixTranslator.InputGetterImpl(ImmutableList.of(Pair.<Expression, PhysType>of(Expressions.variable(Object[].class, "inputValues"), PhysTypeImpl.of(javaTypeFactory, inputRowType, JavaRowFormat.ARRAY, false))));
    final Function1<String, RexToLixTranslator.InputGetter> correlates = new Function1<String, RexToLixTranslator.InputGetter>() {

        public RexToLixTranslator.InputGetter apply(String a0) {
            throw new UnsupportedOperationException();
        }
    };
    final List<Expression> list = RexToLixTranslator.translateProjects(program, javaTypeFactory, builder, PhysTypeImpl.of(javaTypeFactory, outputRowType, JavaRowFormat.ARRAY, false), null, inputGetter, correlates);
    for (int i = 0; i < list.size(); i++) {
        Statement statement = Expressions.statement(list.get(i));
        builder.add(statement);
    }
    return finalizeExpression(builder.toBlock(), inputRowType);
}

Example 17 with RexProgramBuilder

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

the class EnumerableThetaJoin method predicate.

Expression predicate(EnumerableRelImplementor implementor, BlockBuilder builder, PhysType leftPhysType, PhysType rightPhysType, RexNode condition) {
    final ParameterExpression left_ = Expressions.parameter(leftPhysType.getJavaRowType(), "left");
    final ParameterExpression right_ = Expressions.parameter(rightPhysType.getJavaRowType(), "right");
    final RexProgramBuilder program = new RexProgramBuilder(implementor.getTypeFactory().builder().addAll(left.getRowType().getFieldList()).addAll(right.getRowType().getFieldList()).build(), getCluster().getRexBuilder());
    program.addCondition(condition);
    builder.add(Expressions.return_(null, RexToLixTranslator.translateCondition(program.getProgram(), implementor.getTypeFactory(), builder, new RexToLixTranslator.InputGetterImpl(ImmutableList.of(Pair.of((Expression) left_, leftPhysType), Pair.of((Expression) right_, rightPhysType))), implementor.allCorrelateVariables)));
    return Expressions.lambda(Predicate2.class, builder.toBlock(), left_, right_);
}

Example 18 with RexProgramBuilder

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

the class EnumerableFilterToCalcRule method onMatch.

public void onMatch(RelOptRuleCall call) {
    final EnumerableFilter filter = call.rel(0);
    final RelNode input = filter.getInput();
    // Create a program containing a filter.
    final RexBuilder rexBuilder = filter.getCluster().getRexBuilder();
    final RelDataType inputRowType = input.getRowType();
    final RexProgramBuilder programBuilder = new RexProgramBuilder(inputRowType, rexBuilder);
    programBuilder.addIdentity();
    programBuilder.addCondition(filter.getCondition());
    final RexProgram program = programBuilder.getProgram();
    final EnumerableCalc calc = EnumerableCalc.create(input, program);
    call.transformTo(calc);
}

Example 19 with RexProgramBuilder

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

the class ProjectCalcMergeRule method onMatch.

// ~ Methods ----------------------------------------------------------------
public void onMatch(RelOptRuleCall call) {
    final LogicalProject project = call.rel(0);
    final LogicalCalc calc = call.rel(1);
    // Don't merge a project which contains windowed aggregates onto a
    // calc. That would effectively be pushing a windowed aggregate down
    // through a filter. Transform the project into an identical calc,
    // which we'll have chance to merge later, after the over is
    // expanded.
    final RelOptCluster cluster = project.getCluster();
    RexProgram program = RexProgram.create(calc.getRowType(), project.getProjects(), null, project.getRowType(), cluster.getRexBuilder());
    if (RexOver.containsOver(program)) {
        LogicalCalc projectAsCalc = LogicalCalc.create(calc, program);
        call.transformTo(projectAsCalc);
        return;
    }
    // Create a program containing the project node's expressions.
    final RexBuilder rexBuilder = cluster.getRexBuilder();
    final RexProgramBuilder progBuilder = new RexProgramBuilder(calc.getRowType(), rexBuilder);
    for (Pair<RexNode, String> field : project.getNamedProjects()) {
        progBuilder.addProject(field.left, field.right);
    }
    RexProgram topProgram = progBuilder.getProgram();
    RexProgram bottomProgram = calc.getProgram();
    // Merge the programs together.
    RexProgram mergedProgram = RexProgramBuilder.mergePrograms(topProgram, bottomProgram, rexBuilder);
    final LogicalCalc newCalc = LogicalCalc.create(calc.getInput(), mergedProgram);
    call.transformTo(newCalc);
}

Example 20 with RexProgramBuilder

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

the class SemiJoinProjectTransposeRule method adjustCondition.

/**
 * Pulls the project above the semijoin and returns the resulting semijoin
 * condition. As a result, the semijoin condition should be modified such
 * that references to the LHS of a semijoin should now reference the
 * children of the project that's on the LHS.
 *
 * @param project  LogicalProject on the LHS of the semijoin
 * @param semiJoin the semijoin
 * @return the modified semijoin condition
 */
private RexNode adjustCondition(LogicalProject project, SemiJoin semiJoin) {
    // create two RexPrograms -- the bottom one representing a
    // concatenation of the project and the RHS of the semijoin and the
    // top one representing the semijoin condition
    RexBuilder rexBuilder = project.getCluster().getRexBuilder();
    RelDataTypeFactory typeFactory = rexBuilder.getTypeFactory();
    RelNode rightChild = semiJoin.getRight();
    // for the bottom RexProgram, the input is a concatenation of the
    // child of the project and the RHS of the semijoin
    RelDataType bottomInputRowType = SqlValidatorUtil.deriveJoinRowType(project.getInput().getRowType(), rightChild.getRowType(), JoinRelType.INNER, typeFactory, null, semiJoin.getSystemFieldList());
    RexProgramBuilder bottomProgramBuilder = new RexProgramBuilder(bottomInputRowType, rexBuilder);
    // of the semijoin
    for (Pair<RexNode, String> pair : project.getNamedProjects()) {
        bottomProgramBuilder.addProject(pair.left, pair.right);
    }
    int nLeftFields = project.getInput().getRowType().getFieldCount();
    List<RelDataTypeField> rightFields = rightChild.getRowType().getFieldList();
    int nRightFields = rightFields.size();
    for (int i = 0; i < nRightFields; i++) {
        final RelDataTypeField field = rightFields.get(i);
        RexNode inputRef = rexBuilder.makeInputRef(field.getType(), i + nLeftFields);
        bottomProgramBuilder.addProject(inputRef, field.getName());
    }
    RexProgram bottomProgram = bottomProgramBuilder.getProgram();
    // input rowtype into the top program is the concatenation of the
    // project and the RHS of the semijoin
    RelDataType topInputRowType = SqlValidatorUtil.deriveJoinRowType(project.getRowType(), rightChild.getRowType(), JoinRelType.INNER, typeFactory, null, semiJoin.getSystemFieldList());
    RexProgramBuilder topProgramBuilder = new RexProgramBuilder(topInputRowType, rexBuilder);
    topProgramBuilder.addIdentity();
    topProgramBuilder.addCondition(semiJoin.getCondition());
    RexProgram topProgram = topProgramBuilder.getProgram();
    // merge the programs and expand out the local references to form
    // the new semijoin condition; it now references a concatenation of
    // the project's child and the RHS of the semijoin
    RexProgram mergedProgram = RexProgramBuilder.mergePrograms(topProgram, bottomProgram, rexBuilder);
    return mergedProgram.expandLocalRef(mergedProgram.getCondition());
}