Search in sources :

Example 1 with OriginalExpressionUtils.castToRowExpression

use of io.prestosql.sql.relational.OriginalExpressionUtils.castToRowExpression in project hetu-core by openlookeng.

the class AggregationRewriteWithCube method rewrite.

public PlanNode rewrite(AggregationNode originalAggregationNode, PlanNode filterNode) {
    QualifiedObjectName starTreeTableName = QualifiedObjectName.valueOf(cubeMetadata.getCubeName());
    TableHandle cubeTableHandle = metadata.getTableHandle(session, starTreeTableName).orElseThrow(() -> new CubeNotFoundException(starTreeTableName.toString()));
    Map<String, ColumnHandle> cubeColumnsMap = metadata.getColumnHandles(session, cubeTableHandle);
    TableMetadata cubeTableMetadata = metadata.getTableMetadata(session, cubeTableHandle);
    List<ColumnMetadata> cubeColumnMetadataList = cubeTableMetadata.getColumns();
    // Add group by
    List<Symbol> groupings = new ArrayList<>(originalAggregationNode.getGroupingKeys().size());
    for (Symbol symbol : originalAggregationNode.getGroupingKeys()) {
        Object column = symbolMappings.get(symbol.getName());
        if (column instanceof ColumnHandle) {
            groupings.add(new Symbol(((ColumnHandle) column).getColumnName()));
        }
    }
    Set<String> cubeGroups = cubeMetadata.getGroup();
    boolean exactGroupsMatch = false;
    if (groupings.size() == cubeGroups.size()) {
        exactGroupsMatch = groupings.stream().map(Symbol::getName).map(String::toLowerCase).allMatch(cubeGroups::contains);
    }
    CubeRewriteResult cubeRewriteResult = createScanNode(originalAggregationNode, filterNode, cubeTableHandle, cubeColumnsMap, cubeColumnMetadataList, exactGroupsMatch);
    PlanNode planNode = cubeRewriteResult.getTableScanNode();
    // Add filter node
    if (filterNode != null) {
        Expression expression = castToExpression(((FilterNode) filterNode).getPredicate());
        expression = rewriteExpression(expression, rewrittenMappings);
        planNode = new FilterNode(idAllocator.getNextId(), planNode, castToRowExpression(expression));
    }
    if (!exactGroupsMatch) {
        Map<Symbol, Symbol> cubeScanToAggOutputMap = new HashMap<>();
        // Rewrite AggregationNode using Cube table
        ImmutableMap.Builder<Symbol, AggregationNode.Aggregation> aggregationsBuilder = ImmutableMap.builder();
        for (CubeRewriteResult.AggregatorSource aggregatorSource : cubeRewriteResult.getAggregationColumns()) {
            ColumnHandle cubeColHandle = cubeRewriteResult.getTableScanNode().getAssignments().get(aggregatorSource.getScanSymbol());
            ColumnMetadata cubeColumnMetadata = cubeRewriteResult.getSymbolMetadataMap().get(aggregatorSource.getScanSymbol());
            Type type = cubeColumnMetadata.getType();
            AggregationSignature aggregationSignature = cubeMetadata.getAggregationSignature(cubeColumnMetadata.getName()).orElseThrow(() -> new ColumnNotFoundException(new SchemaTableName(starTreeTableName.getSchemaName(), starTreeTableName.getObjectName()), cubeColHandle.getColumnName()));
            String aggFunction = COUNT.getName().equals(aggregationSignature.getFunction()) ? "sum" : aggregationSignature.getFunction();
            SymbolReference argument = toSymbolReference(aggregatorSource.getScanSymbol());
            FunctionHandle functionHandle = metadata.getFunctionAndTypeManager().lookupFunction(aggFunction, TypeSignatureProvider.fromTypeSignatures(type.getTypeSignature()));
            cubeScanToAggOutputMap.put(aggregatorSource.getScanSymbol(), aggregatorSource.getOriginalAggSymbol());
            aggregationsBuilder.put(aggregatorSource.getOriginalAggSymbol(), new AggregationNode.Aggregation(new CallExpression(aggFunction, functionHandle, type, ImmutableList.of(OriginalExpressionUtils.castToRowExpression(argument))), ImmutableList.of(OriginalExpressionUtils.castToRowExpression(argument)), false, Optional.empty(), Optional.empty(), Optional.empty()));
        }
        List<Symbol> groupingKeys = originalAggregationNode.getGroupingKeys().stream().map(Symbol::getName).map(rewrittenMappings::get).collect(Collectors.toList());
        planNode = new AggregationNode(idAllocator.getNextId(), planNode, aggregationsBuilder.build(), singleGroupingSet(groupingKeys), ImmutableList.of(), AggregationNode.Step.SINGLE, Optional.empty(), Optional.empty(), AggregationNode.AggregationType.HASH, Optional.empty());
        AggregationNode aggNode = (AggregationNode) planNode;
        if (!cubeRewriteResult.getAvgAggregationColumns().isEmpty()) {
            if (!cubeRewriteResult.getComputeAvgDividingSumByCount()) {
                Map<Symbol, Expression> aggregateAssignments = new HashMap<>();
                for (CubeRewriteResult.AggregatorSource aggregatorSource : cubeRewriteResult.getAggregationColumns()) {
                    aggregateAssignments.put(aggregatorSource.getOriginalAggSymbol(), toSymbolReference(aggregatorSource.getScanSymbol()));
                }
                planNode = new ProjectNode(idAllocator.getNextId(), aggNode, new Assignments(aggregateAssignments.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, entry -> castToRowExpression(entry.getValue())))));
            } else {
                // If there was an AVG aggregation, map it to AVG = SUM/COUNT
                Map<Symbol, Expression> projections = new HashMap<>();
                aggNode.getGroupingKeys().forEach(symbol -> projections.put(symbol, toSymbolReference(symbol)));
                aggNode.getAggregations().keySet().stream().filter(symbol -> symbolMappings.containsValue(symbol.getName())).forEach(aggSymbol -> projections.put(aggSymbol, toSymbolReference(aggSymbol)));
                // Add AVG = SUM / COUNT
                for (CubeRewriteResult.AverageAggregatorSource avgAggSource : cubeRewriteResult.getAvgAggregationColumns()) {
                    Symbol sumSymbol = cubeScanToAggOutputMap.get(avgAggSource.getSum());
                    Symbol countSymbol = cubeScanToAggOutputMap.get(avgAggSource.getCount());
                    Type avgResultType = typeProvider.get(avgAggSource.getOriginalAggSymbol());
                    ArithmeticBinaryExpression division = new ArithmeticBinaryExpression(ArithmeticBinaryExpression.Operator.DIVIDE, new Cast(toSymbolReference(sumSymbol), avgResultType.getTypeSignature().toString()), new Cast(toSymbolReference(countSymbol), avgResultType.getTypeSignature().toString()));
                    projections.put(avgAggSource.getOriginalAggSymbol(), division);
                }
                planNode = new ProjectNode(idAllocator.getNextId(), aggNode, new Assignments(projections.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, entry -> castToRowExpression(entry.getValue())))));
            }
        }
    }
    // Safety check to remove redundant symbols and rename original column names to intermediate names
    if (!planNode.getOutputSymbols().equals(originalAggregationNode.getOutputSymbols())) {
        // Map new symbol names to the old symbols
        Map<Symbol, Expression> assignments = new HashMap<>();
        Set<Symbol> planNodeOutput = new HashSet<>(planNode.getOutputSymbols());
        for (Symbol originalAggOutputSymbol : originalAggregationNode.getOutputSymbols()) {
            if (!planNodeOutput.contains(originalAggOutputSymbol)) {
                // Must be grouping key
                assignments.put(originalAggOutputSymbol, toSymbolReference(rewrittenMappings.get(originalAggOutputSymbol.getName())));
            } else {
                // Should be an expression and must have the same name in the new plan node
                assignments.put(originalAggOutputSymbol, toSymbolReference(originalAggOutputSymbol));
            }
        }
        planNode = new ProjectNode(idAllocator.getNextId(), planNode, new Assignments(assignments.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, entry -> castToRowExpression(entry.getValue())))));
    }
    return planNode;
}
Also used : TypeProvider(io.prestosql.sql.planner.TypeProvider) ColumnNotFoundException(io.prestosql.spi.connector.ColumnNotFoundException) AggregationNode(io.prestosql.spi.plan.AggregationNode) CallExpression(io.prestosql.spi.relation.CallExpression) Cast(io.prestosql.sql.tree.Cast) FilterNode(io.prestosql.spi.plan.FilterNode) Map(java.util.Map) OriginalExpressionUtils.castToRowExpression(io.prestosql.sql.relational.OriginalExpressionUtils.castToRowExpression) Type(io.prestosql.spi.type.Type) OriginalExpressionUtils.castToExpression(io.prestosql.sql.relational.OriginalExpressionUtils.castToExpression) AggregationNode.singleGroupingSet(io.prestosql.spi.plan.AggregationNode.singleGroupingSet) PrestoException(io.prestosql.spi.PrestoException) SymbolsExtractor(io.prestosql.sql.planner.SymbolsExtractor) SUM(io.hetu.core.spi.cube.CubeAggregateFunction.SUM) ImmutableMap(com.google.common.collect.ImmutableMap) CubeAggregateFunction(io.hetu.core.spi.cube.CubeAggregateFunction) TableScanNode(io.prestosql.spi.plan.TableScanNode) Set(java.util.Set) PlanNode(io.prestosql.spi.plan.PlanNode) UUID(java.util.UUID) ProjectNode(io.prestosql.spi.plan.ProjectNode) Collectors(java.util.stream.Collectors) Metadata(io.prestosql.metadata.Metadata) FunctionHandle(io.prestosql.spi.function.FunctionHandle) PlanSymbolAllocator(io.prestosql.sql.planner.PlanSymbolAllocator) SymbolUtils.toSymbolReference(io.prestosql.sql.planner.SymbolUtils.toSymbolReference) ReuseExchangeOperator(io.prestosql.spi.operator.ReuseExchangeOperator) List(java.util.List) LongLiteral(io.prestosql.sql.tree.LongLiteral) SymbolReference(io.prestosql.sql.tree.SymbolReference) AggregationSignature(io.hetu.core.spi.cube.aggregator.AggregationSignature) Optional(java.util.Optional) StandardErrorCode(io.prestosql.spi.StandardErrorCode) OriginalExpressionUtils(io.prestosql.sql.relational.OriginalExpressionUtils) COUNT(io.hetu.core.spi.cube.CubeAggregateFunction.COUNT) TableMetadata(io.prestosql.metadata.TableMetadata) Logger(io.airlift.log.Logger) TypeSignatureProvider(io.prestosql.sql.analyzer.TypeSignatureProvider) HashMap(java.util.HashMap) TableHandle(io.prestosql.spi.metadata.TableHandle) Function(java.util.function.Function) ExpressionTreeRewriter(io.prestosql.sql.tree.ExpressionTreeRewriter) QualifiedObjectName(io.prestosql.spi.connector.QualifiedObjectName) ArrayList(java.util.ArrayList) HashSet(java.util.HashSet) SchemaTableName(io.prestosql.spi.connector.SchemaTableName) ArithmeticBinaryExpression(io.prestosql.sql.tree.ArithmeticBinaryExpression) ImmutableList(com.google.common.collect.ImmutableList) Session(io.prestosql.Session) ExpressionRewriter(io.prestosql.sql.tree.ExpressionRewriter) Symbol(io.prestosql.spi.plan.Symbol) Assignments(io.prestosql.spi.plan.Assignments) ColumnMetadata(io.prestosql.spi.connector.ColumnMetadata) SymbolAllocator(io.prestosql.spi.SymbolAllocator) ColumnHandle(io.prestosql.spi.connector.ColumnHandle) CUBE_ERROR(io.prestosql.spi.StandardErrorCode.CUBE_ERROR) PlanNodeIdAllocator(io.prestosql.spi.plan.PlanNodeIdAllocator) CubeMetadata(io.hetu.core.spi.cube.CubeMetadata) CubeNotFoundException(io.prestosql.spi.connector.CubeNotFoundException) Comparator(java.util.Comparator) Expression(io.prestosql.sql.tree.Expression) ArithmeticBinaryExpression(io.prestosql.sql.tree.ArithmeticBinaryExpression) Cast(io.prestosql.sql.tree.Cast) ColumnMetadata(io.prestosql.spi.connector.ColumnMetadata) HashMap(java.util.HashMap) Symbol(io.prestosql.spi.plan.Symbol) SymbolUtils.toSymbolReference(io.prestosql.sql.planner.SymbolUtils.toSymbolReference) SymbolReference(io.prestosql.sql.tree.SymbolReference) FilterNode(io.prestosql.spi.plan.FilterNode) ArrayList(java.util.ArrayList) Assignments(io.prestosql.spi.plan.Assignments) PlanNode(io.prestosql.spi.plan.PlanNode) CubeNotFoundException(io.prestosql.spi.connector.CubeNotFoundException) FunctionHandle(io.prestosql.spi.function.FunctionHandle) CallExpression(io.prestosql.spi.relation.CallExpression) HashSet(java.util.HashSet) TableMetadata(io.prestosql.metadata.TableMetadata) ColumnHandle(io.prestosql.spi.connector.ColumnHandle) AggregationSignature(io.hetu.core.spi.cube.aggregator.AggregationSignature) AggregationNode(io.prestosql.spi.plan.AggregationNode) SchemaTableName(io.prestosql.spi.connector.SchemaTableName) QualifiedObjectName(io.prestosql.spi.connector.QualifiedObjectName) ImmutableMap(com.google.common.collect.ImmutableMap) Type(io.prestosql.spi.type.Type) ColumnNotFoundException(io.prestosql.spi.connector.ColumnNotFoundException) CallExpression(io.prestosql.spi.relation.CallExpression) OriginalExpressionUtils.castToRowExpression(io.prestosql.sql.relational.OriginalExpressionUtils.castToRowExpression) OriginalExpressionUtils.castToExpression(io.prestosql.sql.relational.OriginalExpressionUtils.castToExpression) ArithmeticBinaryExpression(io.prestosql.sql.tree.ArithmeticBinaryExpression) Expression(io.prestosql.sql.tree.Expression) TableHandle(io.prestosql.spi.metadata.TableHandle) ProjectNode(io.prestosql.spi.plan.ProjectNode)

Aggregations

ImmutableList (com.google.common.collect.ImmutableList)1 ImmutableMap (com.google.common.collect.ImmutableMap)1 Logger (io.airlift.log.Logger)1 CubeAggregateFunction (io.hetu.core.spi.cube.CubeAggregateFunction)1 COUNT (io.hetu.core.spi.cube.CubeAggregateFunction.COUNT)1 SUM (io.hetu.core.spi.cube.CubeAggregateFunction.SUM)1 CubeMetadata (io.hetu.core.spi.cube.CubeMetadata)1 AggregationSignature (io.hetu.core.spi.cube.aggregator.AggregationSignature)1 Session (io.prestosql.Session)1 Metadata (io.prestosql.metadata.Metadata)1 TableMetadata (io.prestosql.metadata.TableMetadata)1 PrestoException (io.prestosql.spi.PrestoException)1 StandardErrorCode (io.prestosql.spi.StandardErrorCode)1 CUBE_ERROR (io.prestosql.spi.StandardErrorCode.CUBE_ERROR)1 SymbolAllocator (io.prestosql.spi.SymbolAllocator)1 ColumnHandle (io.prestosql.spi.connector.ColumnHandle)1 ColumnMetadata (io.prestosql.spi.connector.ColumnMetadata)1 ColumnNotFoundException (io.prestosql.spi.connector.ColumnNotFoundException)1 CubeNotFoundException (io.prestosql.spi.connector.CubeNotFoundException)1 QualifiedObjectName (io.prestosql.spi.connector.QualifiedObjectName)1