Examples with Pair org.apache.calcite.util.Pair used on opensource projects

Example 11 with Pair

use of org.apache.calcite.util.Pair in project hive by apache.

the class HiveUnionPullUpConstantsRule method onMatch.

@Override
public void onMatch(RelOptRuleCall call) {
    final Union union = call.rel(0);
    final int count = union.getRowType().getFieldCount();
    if (count == 1) {
        // Project operator.
        return;
    }
    final RexBuilder rexBuilder = union.getCluster().getRexBuilder();
    final RelMetadataQuery mq = RelMetadataQuery.instance();
    final RelOptPredicateList predicates = mq.getPulledUpPredicates(union);
    if (predicates == null) {
        return;
    }
    Map<RexNode, RexNode> conditionsExtracted = HiveReduceExpressionsRule.predicateConstants(RexNode.class, rexBuilder, predicates);
    Map<RexNode, RexNode> constants = new HashMap<>();
    for (int i = 0; i < count; i++) {
        RexNode expr = rexBuilder.makeInputRef(union, i);
        if (conditionsExtracted.containsKey(expr)) {
            constants.put(expr, conditionsExtracted.get(expr));
        }
    }
    // None of the expressions are constant. Nothing to do.
    if (constants.isEmpty()) {
        return;
    }
    // Create expressions for Project operators before and after the Union
    List<RelDataTypeField> fields = union.getRowType().getFieldList();
    List<RexNode> topChildExprs = new ArrayList<>();
    List<String> topChildExprsFields = new ArrayList<>();
    List<RexNode> refs = new ArrayList<>();
    ImmutableBitSet.Builder refsIndexBuilder = ImmutableBitSet.builder();
    for (int i = 0; i < count; i++) {
        RexNode expr = rexBuilder.makeInputRef(union, i);
        RelDataTypeField field = fields.get(i);
        if (constants.containsKey(expr)) {
            topChildExprs.add(constants.get(expr));
            topChildExprsFields.add(field.getName());
        } else {
            topChildExprs.add(expr);
            topChildExprsFields.add(field.getName());
            refs.add(expr);
            refsIndexBuilder.set(i);
        }
    }
    ImmutableBitSet refsIndex = refsIndexBuilder.build();
    // Update top Project positions
    final Mappings.TargetMapping mapping = RelOptUtil.permutation(refs, union.getInput(0).getRowType()).inverse();
    topChildExprs = ImmutableList.copyOf(RexUtil.apply(mapping, topChildExprs));
    // Create new Project-Union-Project sequences
    final RelBuilder relBuilder = call.builder();
    for (int i = 0; i < union.getInputs().size(); i++) {
        RelNode input = union.getInput(i);
        List<Pair<RexNode, String>> newChildExprs = new ArrayList<>();
        for (int j = 0; j < refsIndex.cardinality(); j++) {
            int pos = refsIndex.nth(j);
            newChildExprs.add(Pair.<RexNode, String>of(rexBuilder.makeInputRef(input, pos), input.getRowType().getFieldList().get(pos).getName()));
        }
        if (newChildExprs.isEmpty()) {
            // At least a single item in project is required.
            newChildExprs.add(Pair.<RexNode, String>of(topChildExprs.get(0), topChildExprsFields.get(0)));
        }
        // Add the input with project on top
        relBuilder.push(input);
        relBuilder.project(Pair.left(newChildExprs), Pair.right(newChildExprs));
    }
    relBuilder.union(union.all, union.getInputs().size());
    // Create top Project fixing nullability of fields
    relBuilder.project(topChildExprs, topChildExprsFields);
    relBuilder.convert(union.getRowType(), false);
    call.transformTo(relBuilder.build());
}

Example 12 with Pair

use of org.apache.calcite.util.Pair in project drill by apache.

the class NumberingRelWriter method done.

public RelWriter done(RelNode node) {
    int i = 0;
    if (values.size() > 0 && values.get(0).left.equals("subset")) {
        ++i;
    }
    for (RelNode input : node.getInputs()) {
        assert values.get(i).right == input;
        ++i;
    }
    for (RexNode expr : node.getChildExps()) {
        assert values.get(i).right == expr;
        ++i;
    }
    final List<Pair<String, Object>> valuesCopy = ImmutableList.copyOf(values);
    values.clear();
    explain_(node, valuesCopy);
    pw.flush();
    return this;
}

Example 13 with Pair

use of org.apache.calcite.util.Pair in project lucene-solr by apache.

the class SolrAggregate method toSolrMetric.

private Pair<String, String> toSolrMetric(Implementor implementor, AggregateCall aggCall, List<String> inNames) {
    SqlAggFunction aggregation = aggCall.getAggregation();
    List<Integer> args = aggCall.getArgList();
    switch(args.size()) {
        case 0:
            if (aggregation.equals(SqlStdOperatorTable.COUNT)) {
                return new Pair<>(aggregation.getName(), "*");
            }
        case 1:
            String inName = inNames.get(args.get(0));
            String name = implementor.fieldMappings.getOrDefault(inName, inName);
            if (SUPPORTED_AGGREGATIONS.contains(aggregation)) {
                return new Pair<>(aggregation.getName(), name);
            }
        default:
            throw new AssertionError("Invalid aggregation " + aggregation + " with args " + args + " with names" + inNames);
    }
}

Example 14 with Pair

use of org.apache.calcite.util.Pair in project flink by apache.

the class FlinkAggregateExpandDistinctAggregatesRule method convertSingletonDistinct.

/**
	 * Converts an aggregate with one distinct aggregate and one or more
	 * non-distinct aggregates to multi-phase aggregates (see reference example
	 * below).
	 *
	 * @param relBuilder Contains the input relational expression
	 * @param aggregate  Original aggregate
	 * @param argLists   Arguments and filters to the distinct aggregate function
	 *
	 */
private RelBuilder convertSingletonDistinct(RelBuilder relBuilder, Aggregate aggregate, Set<Pair<List<Integer>, Integer>> argLists) {
    // For example,
    //	SELECT deptno, COUNT(*), SUM(bonus), MIN(DISTINCT sal)
    //	FROM emp
    //	GROUP BY deptno
    //
    // becomes
    //
    //	SELECT deptno, SUM(cnt), SUM(bonus), MIN(sal)
    //	FROM (
    //		  SELECT deptno, COUNT(*) as cnt, SUM(bonus), sal
    //		  FROM EMP
    //		  GROUP BY deptno, sal)			// Aggregate B
    //	GROUP BY deptno						// Aggregate A
    relBuilder.push(aggregate.getInput());
    final List<Pair<RexNode, String>> projects = new ArrayList<>();
    final Map<Integer, Integer> sourceOf = new HashMap<>();
    SortedSet<Integer> newGroupSet = new TreeSet<>();
    final List<RelDataTypeField> childFields = relBuilder.peek().getRowType().getFieldList();
    final boolean hasGroupBy = aggregate.getGroupSet().size() > 0;
    SortedSet<Integer> groupSet = new TreeSet<>(aggregate.getGroupSet().asList());
    // Add the distinct aggregate column(s) to the group-by columns,
    // if not already a part of the group-by
    newGroupSet.addAll(aggregate.getGroupSet().asList());
    for (Pair<List<Integer>, Integer> argList : argLists) {
        newGroupSet.addAll(argList.getKey());
    }
    // transformation.
    for (int arg : newGroupSet) {
        sourceOf.put(arg, projects.size());
        projects.add(RexInputRef.of2(arg, childFields));
    }
    // Generate the intermediate aggregate B
    final List<AggregateCall> aggCalls = aggregate.getAggCallList();
    final List<AggregateCall> newAggCalls = new ArrayList<>();
    final List<Integer> fakeArgs = new ArrayList<>();
    final Map<AggregateCall, Integer> callArgMap = new HashMap<>();
    // e.g. if real arguments are 0, 1, 3. Then the fake arguments will be 2, 4
    for (final AggregateCall aggCall : aggCalls) {
        if (!aggCall.isDistinct()) {
            for (int arg : aggCall.getArgList()) {
                if (!groupSet.contains(arg)) {
                    sourceOf.put(arg, projects.size());
                }
            }
        }
    }
    int fakeArg0 = 0;
    for (final AggregateCall aggCall : aggCalls) {
        // We will deal with non-distinct aggregates below
        if (!aggCall.isDistinct()) {
            boolean isGroupKeyUsedInAgg = false;
            for (int arg : aggCall.getArgList()) {
                if (groupSet.contains(arg)) {
                    isGroupKeyUsedInAgg = true;
                    break;
                }
            }
            if (aggCall.getArgList().size() == 0 || isGroupKeyUsedInAgg) {
                while (sourceOf.get(fakeArg0) != null) {
                    ++fakeArg0;
                }
                fakeArgs.add(fakeArg0);
                ++fakeArg0;
            }
        }
    }
    for (final AggregateCall aggCall : aggCalls) {
        if (!aggCall.isDistinct()) {
            for (int arg : aggCall.getArgList()) {
                if (!groupSet.contains(arg)) {
                    sourceOf.remove(arg);
                }
            }
        }
    }
    // Compute the remapped arguments using fake arguments for non-distinct
    // aggregates with no arguments e.g. count(*).
    int fakeArgIdx = 0;
    for (final AggregateCall aggCall : aggCalls) {
        // as-is all the non-distinct aggregates
        if (!aggCall.isDistinct()) {
            final AggregateCall newCall = AggregateCall.create(aggCall.getAggregation(), false, aggCall.getArgList(), -1, ImmutableBitSet.of(newGroupSet).cardinality(), relBuilder.peek(), null, aggCall.name);
            newAggCalls.add(newCall);
            if (newCall.getArgList().size() == 0) {
                int fakeArg = fakeArgs.get(fakeArgIdx);
                callArgMap.put(newCall, fakeArg);
                sourceOf.put(fakeArg, projects.size());
                projects.add(Pair.of((RexNode) new RexInputRef(fakeArg, newCall.getType()), newCall.getName()));
                ++fakeArgIdx;
            } else {
                for (int arg : newCall.getArgList()) {
                    if (groupSet.contains(arg)) {
                        int fakeArg = fakeArgs.get(fakeArgIdx);
                        callArgMap.put(newCall, fakeArg);
                        sourceOf.put(fakeArg, projects.size());
                        projects.add(Pair.of((RexNode) new RexInputRef(fakeArg, newCall.getType()), newCall.getName()));
                        ++fakeArgIdx;
                    } else {
                        sourceOf.put(arg, projects.size());
                        projects.add(Pair.of((RexNode) new RexInputRef(arg, newCall.getType()), newCall.getName()));
                    }
                }
            }
        }
    }
    // Generate the aggregate B (see the reference example above)
    relBuilder.push(aggregate.copy(aggregate.getTraitSet(), relBuilder.build(), false, ImmutableBitSet.of(newGroupSet), null, newAggCalls));
    // Convert the existing aggregate to aggregate A (see the reference example above)
    final List<AggregateCall> newTopAggCalls = Lists.newArrayList(aggregate.getAggCallList());
    // Use the remapped arguments for the (non)distinct aggregate calls
    for (int i = 0; i < newTopAggCalls.size(); i++) {
        // Re-map arguments.
        final AggregateCall aggCall = newTopAggCalls.get(i);
        final int argCount = aggCall.getArgList().size();
        final List<Integer> newArgs = new ArrayList<>(argCount);
        final AggregateCall newCall;
        for (int j = 0; j < argCount; j++) {
            final Integer arg = aggCall.getArgList().get(j);
            if (callArgMap.containsKey(aggCall)) {
                newArgs.add(sourceOf.get(callArgMap.get(aggCall)));
            } else {
                newArgs.add(sourceOf.get(arg));
            }
        }
        if (aggCall.isDistinct()) {
            newCall = AggregateCall.create(aggCall.getAggregation(), false, newArgs, -1, aggregate.getGroupSet().cardinality(), relBuilder.peek(), aggCall.getType(), aggCall.name);
        } else {
            // aggregate A must be SUM. For other aggregates, it remains the same.
            if (aggCall.getAggregation() instanceof SqlCountAggFunction) {
                if (aggCall.getArgList().size() == 0) {
                    newArgs.add(sourceOf.get(callArgMap.get(aggCall)));
                }
                if (hasGroupBy) {
                    SqlSumAggFunction sumAgg = new SqlSumAggFunction(null);
                    newCall = AggregateCall.create(sumAgg, false, newArgs, -1, aggregate.getGroupSet().cardinality(), relBuilder.peek(), aggCall.getType(), aggCall.getName());
                } else {
                    SqlSumEmptyIsZeroAggFunction sumAgg = new SqlSumEmptyIsZeroAggFunction();
                    newCall = AggregateCall.create(sumAgg, false, newArgs, -1, aggregate.getGroupSet().cardinality(), relBuilder.peek(), aggCall.getType(), aggCall.getName());
                }
            } else {
                newCall = AggregateCall.create(aggCall.getAggregation(), false, newArgs, -1, aggregate.getGroupSet().cardinality(), relBuilder.peek(), aggCall.getType(), aggCall.name);
            }
        }
        newTopAggCalls.set(i, newCall);
    }
    // Populate the group-by keys with the remapped arguments for aggregate A
    newGroupSet.clear();
    for (int arg : aggregate.getGroupSet()) {
        newGroupSet.add(sourceOf.get(arg));
    }
    relBuilder.push(aggregate.copy(aggregate.getTraitSet(), relBuilder.build(), aggregate.indicator, ImmutableBitSet.of(newGroupSet), null, newTopAggCalls));
    return relBuilder;
}

Example 15 with Pair

use of org.apache.calcite.util.Pair in project flink by apache.

the class FlinkAggregateExpandDistinctAggregatesRule method rewriteUsingGroupingSets.

/*
	public RelBuilder convertSingletonDistinct(RelBuilder relBuilder,
											   Aggregate aggregate, Set<Pair<List<Integer>, Integer>> argLists) {
		// For example,
		//	SELECT deptno, COUNT(*), SUM(bonus), MIN(DISTINCT sal)
		//	FROM emp
		//	GROUP BY deptno
		//
		// becomes
		//
		//	SELECT deptno, SUM(cnt), SUM(bonus), MIN(sal)
		//	FROM (
		//		  SELECT deptno, COUNT(*) as cnt, SUM(bonus), sal
		//		  FROM EMP
		//		  GROUP BY deptno, sal)			// Aggregate B
		//	GROUP BY deptno						// Aggregate A
		relBuilder.push(aggregate.getInput());
		final List<Pair<RexNode, String>> projects = new ArrayList<>();
		final Map<Integer, Integer> sourceOf = new HashMap<>();
		SortedSet<Integer> newGroupSet = new TreeSet<>();
		final List<RelDataTypeField> childFields =
				relBuilder.peek().getRowType().getFieldList();
		final boolean hasGroupBy = aggregate.getGroupSet().size() > 0;

		// Add the distinct aggregate column(s) to the group-by columns,
		// if not already a part of the group-by
		newGroupSet.addAll(aggregate.getGroupSet().asList());
		for (Pair<List<Integer>, Integer> argList : argLists) {
			newGroupSet.addAll(argList.getKey());
		}

		// Re-map the arguments to the aggregate A. These arguments will get
		// remapped because of the intermediate aggregate B generated as part of the
		// transformation.
		for (int arg : newGroupSet) {
			sourceOf.put(arg, projects.size());
			projects.add(RexInputRef.of2(arg, childFields));
		}
		// Generate the intermediate aggregate B
		final List<AggregateCall> aggCalls = aggregate.getAggCallList();
		final List<AggregateCall> newAggCalls = new ArrayList<>();
		final List<Integer> fakeArgs = new ArrayList<>();
		final Map<AggregateCall, Integer> callArgMap = new HashMap<>();
		// First identify the real arguments, then use the rest for fake arguments
		// e.g. if real arguments are 0, 1, 3. Then the fake arguments will be 2, 4
		for (final AggregateCall aggCall : aggCalls) {
			if (!aggCall.isDistinct()) {
				for (int arg : aggCall.getArgList()) {
					if (!sourceOf.containsKey(arg)) {
						sourceOf.put(arg, projects.size());
					}
				}
			}
		}
		int fakeArg0 = 0;
		for (final AggregateCall aggCall : aggCalls) {
			// We will deal with non-distinct aggregates below
			if (!aggCall.isDistinct()) {
				boolean isGroupKeyUsedInAgg = false;
				for (int arg : aggCall.getArgList()) {
					if (sourceOf.containsKey(arg)) {
						isGroupKeyUsedInAgg = true;
						break;
					}
				}
				if (aggCall.getArgList().size() == 0 || isGroupKeyUsedInAgg) {
					while (sourceOf.get(fakeArg0) != null) {
						++fakeArg0;
					}
					fakeArgs.add(fakeArg0);
				}
			}
		}
		for (final AggregateCall aggCall : aggCalls) {
			if (!aggCall.isDistinct()) {
				for (int arg : aggCall.getArgList()) {
					if (!sourceOf.containsKey(arg)) {
						sourceOf.remove(arg);
					}
				}
			}
		}
		// Compute the remapped arguments using fake arguments for non-distinct
		// aggregates with no arguments e.g. count(*).
		int fakeArgIdx = 0;
		for (final AggregateCall aggCall : aggCalls) {
			// Project the column corresponding to the distinct aggregate. Project
			// as-is all the non-distinct aggregates
			if (!aggCall.isDistinct()) {
				final AggregateCall newCall =
						AggregateCall.create(aggCall.getAggregation(), false,
								aggCall.getArgList(), -1,
								ImmutableBitSet.of(newGroupSet).cardinality(),
								relBuilder.peek(), null, aggCall.name);
				newAggCalls.add(newCall);
				if (newCall.getArgList().size() == 0) {
					int fakeArg = fakeArgs.get(fakeArgIdx);
					callArgMap.put(newCall, fakeArg);
					sourceOf.put(fakeArg, projects.size());
					projects.add(
							Pair.of((RexNode) new RexInputRef(fakeArg, newCall.getType()),
									newCall.getName()));
					++fakeArgIdx;
				} else {
					for (int arg : newCall.getArgList()) {
						if (sourceOf.containsKey(arg)) {
							int fakeArg = fakeArgs.get(fakeArgIdx);
							callArgMap.put(newCall, fakeArg);
							sourceOf.put(fakeArg, projects.size());
							projects.add(
									Pair.of((RexNode) new RexInputRef(fakeArg, newCall.getType()),
											newCall.getName()));
							++fakeArgIdx;
						} else {
							sourceOf.put(arg, projects.size());
							projects.add(
									Pair.of((RexNode) new RexInputRef(arg, newCall.getType()),
											newCall.getName()));
						}
					}
				}
			}
		}
		// Generate the aggregate B (see the reference example above)
		relBuilder.push(
				aggregate.copy(
						aggregate.getTraitSet(), relBuilder.build(),
						false, ImmutableBitSet.of(newGroupSet), null, newAggCalls));
		// Convert the existing aggregate to aggregate A (see the reference example above)
		final List<AggregateCall> newTopAggCalls =
				Lists.newArrayList(aggregate.getAggCallList());
		// Use the remapped arguments for the (non)distinct aggregate calls
		for (int i = 0; i < newTopAggCalls.size(); i++) {
			// Re-map arguments.
			final AggregateCall aggCall = newTopAggCalls.get(i);
			final int argCount = aggCall.getArgList().size();
			final List<Integer> newArgs = new ArrayList<>(argCount);
			final AggregateCall newCall;


			for (int j = 0; j < argCount; j++) {
				final Integer arg = aggCall.getArgList().get(j);
				if (callArgMap.containsKey(aggCall)) {
					newArgs.add(sourceOf.get(callArgMap.get(aggCall)));
				}
				else {
					newArgs.add(sourceOf.get(arg));
				}
			}
			if (aggCall.isDistinct()) {
				newCall =
						AggregateCall.create(aggCall.getAggregation(), false, newArgs,
								-1, aggregate.getGroupSet().cardinality(), relBuilder.peek(),
								aggCall.getType(), aggCall.name);
			} else {
				// If aggregate B had a COUNT aggregate call the corresponding aggregate at
				// aggregate A must be SUM. For other aggregates, it remains the same.
				if (aggCall.getAggregation() instanceof SqlCountAggFunction) {
					if (aggCall.getArgList().size() == 0) {
						newArgs.add(sourceOf.get(callArgMap.get(aggCall)));
					}
					if (hasGroupBy) {
						SqlSumAggFunction sumAgg = new SqlSumAggFunction(null);
						newCall =
								AggregateCall.create(sumAgg, false, newArgs, -1,
										aggregate.getGroupSet().cardinality(), relBuilder.peek(),
										aggCall.getType(), aggCall.getName());
					} else {
						SqlSumEmptyIsZeroAggFunction sumAgg = new SqlSumEmptyIsZeroAggFunction();
						newCall =
								AggregateCall.create(sumAgg, false, newArgs, -1,
										aggregate.getGroupSet().cardinality(), relBuilder.peek(),
										aggCall.getType(), aggCall.getName());
					}
				} else {
					newCall =
							AggregateCall.create(aggCall.getAggregation(), false, newArgs, -1,
									aggregate.getGroupSet().cardinality(),
									relBuilder.peek(), aggCall.getType(), aggCall.name);
				}
			}
			newTopAggCalls.set(i, newCall);
		}
		// Populate the group-by keys with the remapped arguments for aggregate A
		newGroupSet.clear();
		for (int arg : aggregate.getGroupSet()) {
			newGroupSet.add(sourceOf.get(arg));
		}
		relBuilder.push(
				aggregate.copy(aggregate.getTraitSet(),
						relBuilder.build(), aggregate.indicator,
						ImmutableBitSet.of(newGroupSet), null, newTopAggCalls));
		return relBuilder;
	}
	*/
@SuppressWarnings("DanglingJavadoc")
private void rewriteUsingGroupingSets(RelOptRuleCall call, Aggregate aggregate, Set<Pair<List<Integer>, Integer>> argLists) {
    final Set<ImmutableBitSet> groupSetTreeSet = new TreeSet<>(ImmutableBitSet.ORDERING);
    groupSetTreeSet.add(aggregate.getGroupSet());
    for (Pair<List<Integer>, Integer> argList : argLists) {
        groupSetTreeSet.add(ImmutableBitSet.of(argList.left).setIf(argList.right, argList.right >= 0).union(aggregate.getGroupSet()));
    }
    final ImmutableList<ImmutableBitSet> groupSets = ImmutableList.copyOf(groupSetTreeSet);
    final ImmutableBitSet fullGroupSet = ImmutableBitSet.union(groupSets);
    final List<AggregateCall> distinctAggCalls = new ArrayList<>();
    for (Pair<AggregateCall, String> aggCall : aggregate.getNamedAggCalls()) {
        if (!aggCall.left.isDistinct()) {
            distinctAggCalls.add(aggCall.left.rename(aggCall.right));
        }
    }
    final RelBuilder relBuilder = call.builder();
    relBuilder.push(aggregate.getInput());
    relBuilder.aggregate(relBuilder.groupKey(fullGroupSet, groupSets.size() > 1, groupSets), distinctAggCalls);
    final RelNode distinct = relBuilder.peek();
    final int groupCount = fullGroupSet.cardinality();
    final int indicatorCount = groupSets.size() > 1 ? groupCount : 0;
    final RelOptCluster cluster = aggregate.getCluster();
    final RexBuilder rexBuilder = cluster.getRexBuilder();
    final RelDataTypeFactory typeFactory = cluster.getTypeFactory();
    final RelDataType booleanType = typeFactory.createTypeWithNullability(typeFactory.createSqlType(SqlTypeName.BOOLEAN), false);
    final List<Pair<RexNode, String>> predicates = new ArrayList<>();
    final Map<ImmutableBitSet, Integer> filters = new HashMap<>();
    /** Function to register a filter for a group set. */
    class Registrar {

        RexNode group = null;

        private int register(ImmutableBitSet groupSet) {
            if (group == null) {
                group = makeGroup(groupCount - 1);
            }
            final RexNode node = rexBuilder.makeCall(SqlStdOperatorTable.EQUALS, group, rexBuilder.makeExactLiteral(toNumber(remap(fullGroupSet, groupSet))));
            predicates.add(Pair.of(node, toString(groupSet)));
            return groupCount + indicatorCount + distinctAggCalls.size() + predicates.size() - 1;
        }

        private RexNode makeGroup(int i) {
            final RexInputRef ref = rexBuilder.makeInputRef(booleanType, groupCount + i);
            final RexNode kase = rexBuilder.makeCall(SqlStdOperatorTable.CASE, ref, rexBuilder.makeExactLiteral(BigDecimal.ZERO), rexBuilder.makeExactLiteral(TWO.pow(i)));
            if (i == 0) {
                return kase;
            } else {
                return rexBuilder.makeCall(SqlStdOperatorTable.PLUS, makeGroup(i - 1), kase);
            }
        }

        private BigDecimal toNumber(ImmutableBitSet bitSet) {
            BigDecimal n = BigDecimal.ZERO;
            for (int key : bitSet) {
                n = n.add(TWO.pow(key));
            }
            return n;
        }

        private String toString(ImmutableBitSet bitSet) {
            final StringBuilder buf = new StringBuilder("$i");
            for (int key : bitSet) {
                buf.append(key).append('_');
            }
            return buf.substring(0, buf.length() - 1);
        }
    }
    final Registrar registrar = new Registrar();
    for (ImmutableBitSet groupSet : groupSets) {
        filters.put(groupSet, registrar.register(groupSet));
    }
    if (!predicates.isEmpty()) {
        List<Pair<RexNode, String>> nodes = new ArrayList<>();
        for (RelDataTypeField f : relBuilder.peek().getRowType().getFieldList()) {
            final RexNode node = rexBuilder.makeInputRef(f.getType(), f.getIndex());
            nodes.add(Pair.of(node, f.getName()));
        }
        nodes.addAll(predicates);
        relBuilder.project(Pair.left(nodes), Pair.right(nodes));
    }
    int x = groupCount + indicatorCount;
    final List<AggregateCall> newCalls = new ArrayList<>();
    for (AggregateCall aggCall : aggregate.getAggCallList()) {
        final int newFilterArg;
        final List<Integer> newArgList;
        final SqlAggFunction aggregation;
        if (!aggCall.isDistinct()) {
            aggregation = SqlStdOperatorTable.MIN;
            newArgList = ImmutableIntList.of(x++);
            newFilterArg = filters.get(aggregate.getGroupSet());
        } else {
            aggregation = aggCall.getAggregation();
            newArgList = remap(fullGroupSet, aggCall.getArgList());
            newFilterArg = filters.get(ImmutableBitSet.of(aggCall.getArgList()).setIf(aggCall.filterArg, aggCall.filterArg >= 0).union(aggregate.getGroupSet()));
        }
        final AggregateCall newCall = AggregateCall.create(aggregation, false, newArgList, newFilterArg, aggregate.getGroupCount(), distinct, null, aggCall.name);
        newCalls.add(newCall);
    }
    relBuilder.aggregate(relBuilder.groupKey(remap(fullGroupSet, aggregate.getGroupSet()), aggregate.indicator, remap(fullGroupSet, aggregate.getGroupSets())), newCalls);
    relBuilder.convert(aggregate.getRowType(), true);
    call.transformTo(relBuilder.build());
}