Examples with RelNode org.apache.calcite.rel.RelNode used on opensource projects

Example 31 with RelNode

use of org.apache.calcite.rel.RelNode in project hive by apache.

the class ASTConverter method convert.

public static ASTNode convert(final RelNode relNode, List<FieldSchema> resultSchema, boolean alignColumns) throws CalciteSemanticException {
    RelNode root = PlanModifierForASTConv.convertOpTree(relNode, resultSchema, alignColumns);
    ASTConverter c = new ASTConverter(root, 0);
    return c.convert();
}

Example 32 with RelNode

use of org.apache.calcite.rel.RelNode in project hive by apache.

the class HiveRelColumnsAlignment method align.

public RelNode align(Project rel, List<RelFieldCollation> collations) {
    // 1) We extract the collations indices
    boolean containsWindowing = false;
    for (RexNode childExp : rel.getChildExps()) {
        if (childExp instanceof RexOver) {
            // TODO: support propagation for partitioning/ordering in windowing
            containsWindowing = true;
            break;
        }
    }
    ImmutableList.Builder<RelFieldCollation> propagateCollations = ImmutableList.builder();
    if (!containsWindowing) {
        for (RelFieldCollation c : collations) {
            RexNode rexNode = rel.getChildExps().get(c.getFieldIndex());
            if (rexNode instanceof RexInputRef) {
                int newIdx = ((RexInputRef) rexNode).getIndex();
                propagateCollations.add(c.copy((newIdx)));
            }
        }
    }
    // 2) We propagate
    final RelNode child = dispatchAlign(rel.getInput(), propagateCollations.build());
    // 3) Return new Project
    return rel.copy(rel.getTraitSet(), ImmutableList.of(child));
}

Example 33 with RelNode

use of org.apache.calcite.rel.RelNode in project hive by apache.

the class HiveRelDecorrelator method getCorRel.

//this returns the source of corVar i.e. Rel which produces cor var
// value. Therefore it is always LogicalCorrelate's left input which is outer query
private RelNode getCorRel(CorRef corVar) {
    final RelNode r = cm.mapCorToCorRel.get(corVar.corr);
    RelNode ret = r.getInput(0);
    return ret;
}

Example 34 with RelNode

use of org.apache.calcite.rel.RelNode in project hive by apache.

the class HiveRelDecorrelator method decorrelateRel.

/**
   * Rewrite LogicalProject.
   *
   * @param rel the project rel to rewrite
   */
public Frame decorrelateRel(LogicalProject rel) throws SemanticException {
    //
    // Rewrite logic:
    //
    // 1. Pass along any correlated variables coming from the input.
    //
    final RelNode oldInput = rel.getInput();
    Frame frame = getInvoke(oldInput, rel);
    if (frame == null) {
        // If input has not been rewritten, do not rewrite this rel.
        return null;
    }
    final List<RexNode> oldProjects = rel.getProjects();
    final List<RelDataTypeField> relOutput = rel.getRowType().getFieldList();
    // LogicalProject projects the original expressions,
    // plus any correlated variables the input wants to pass along.
    final List<Pair<RexNode, String>> projects = Lists.newArrayList();
    // and produce the correlated variables in the new output.
    if (cm.mapRefRelToCorRef.containsKey(rel)) {
        frame = decorrelateInputWithValueGenerator(rel);
    }
    // LogicalProject projects the original expressions
    final Map<Integer, Integer> mapOldToNewOutputs = new HashMap<>();
    int newPos;
    for (newPos = 0; newPos < oldProjects.size(); newPos++) {
        projects.add(newPos, Pair.of(decorrelateExpr(oldProjects.get(newPos)), relOutput.get(newPos).getName()));
        mapOldToNewOutputs.put(newPos, newPos);
    }
    // Project any correlated variables the input wants to pass along.
    final SortedMap<CorDef, Integer> corDefOutputs = new TreeMap<>();
    for (Map.Entry<CorDef, Integer> entry : frame.corDefOutputs.entrySet()) {
        projects.add(RexInputRef.of2(entry.getValue(), frame.r.getRowType().getFieldList()));
        corDefOutputs.put(entry.getKey(), newPos);
        newPos++;
    }
    RelNode newProject = HiveProject.create(frame.r, Pair.left(projects), Pair.right(projects));
    return register(rel, newProject, mapOldToNewOutputs, corDefOutputs);
}

Example 35 with RelNode

use of org.apache.calcite.rel.RelNode in project hive by apache.

the class HiveRelDecorrelator method decorrelate.

private RelNode decorrelate(RelNode root) {
    // first adjust count() expression if any
    HepProgram program = HepProgram.builder().addRuleInstance(new AdjustProjectForCountAggregateRule(false)).addRuleInstance(new AdjustProjectForCountAggregateRule(true)).addRuleInstance(FilterJoinRule.FILTER_ON_JOIN).addRuleInstance(FilterProjectTransposeRule.INSTANCE).build();
    HepPlanner planner = createPlanner(program);
    planner.setRoot(root);
    root = planner.findBestExp();
    // Perform decorrelation.
    map.clear();
    final Frame frame = getInvoke(root, null);
    if (frame != null) {
        // has been rewritten; apply rules post-decorrelation
        final HepProgram program2 = HepProgram.builder().addRuleInstance(FilterJoinRule.FILTER_ON_JOIN).addRuleInstance(FilterJoinRule.JOIN).build();
        final HepPlanner planner2 = createPlanner(program2);
        final RelNode newRoot = frame.r;
        planner2.setRoot(newRoot);
        return planner2.findBestExp();
    }
    return root;
}