Examples with GenericLiteral io.trino.sql.tree.GenericLiteral used on opensource projects

Example 21 with GenericLiteral

use of io.trino.sql.tree.GenericLiteral in project trino by trinodb.

the class QueryPlanner method planExpand.

public RelationPlan planExpand(Query query) {
    checkArgument(analysis.isExpandableQuery(query), "query is not registered as expandable");
    Union union = (Union) query.getQueryBody();
    ImmutableList.Builder<NodeAndMappings> recursionSteps = ImmutableList.builder();
    // plan anchor relation
    Relation anchorNode = union.getRelations().get(0);
    RelationPlan anchorPlan = new RelationPlanner(analysis, symbolAllocator, idAllocator, lambdaDeclarationToSymbolMap, plannerContext, outerContext, session, recursiveSubqueries).process(anchorNode, null);
    // prune anchor plan outputs to contain only the symbols exposed in the scope
    NodeAndMappings prunedAnchorPlan = pruneInvisibleFields(anchorPlan, idAllocator);
    // if the anchor plan has duplicate output symbols, add projection on top to make the symbols unique
    // This is necessary to successfully unroll recursion: the recursion step relation must follow
    // the same layout while it might not have duplicate outputs where the anchor plan did
    NodeAndMappings disambiguatedAnchorPlan = disambiguateOutputs(prunedAnchorPlan, symbolAllocator, idAllocator);
    anchorPlan = new RelationPlan(disambiguatedAnchorPlan.getNode(), analysis.getScope(query), disambiguatedAnchorPlan.getFields(), outerContext);
    recursionSteps.add(copy(anchorPlan.getRoot(), anchorPlan.getFieldMappings()));
    // plan recursion step
    Relation recursionStepRelation = union.getRelations().get(1);
    RelationPlan recursionStepPlan = new RelationPlanner(analysis, symbolAllocator, idAllocator, lambdaDeclarationToSymbolMap, plannerContext, outerContext, session, ImmutableMap.of(NodeRef.of(analysis.getRecursiveReference(query)), anchorPlan)).process(recursionStepRelation, null);
    // coerce recursion step outputs and prune them to contain only the symbols exposed in the scope
    NodeAndMappings coercedRecursionStep;
    List<Type> types = analysis.getRelationCoercion(recursionStepRelation);
    if (types == null) {
        coercedRecursionStep = pruneInvisibleFields(recursionStepPlan, idAllocator);
    } else {
        coercedRecursionStep = coerce(recursionStepPlan, types, symbolAllocator, idAllocator);
    }
    NodeAndMappings replacementSpot = new NodeAndMappings(anchorPlan.getRoot(), anchorPlan.getFieldMappings());
    PlanNode recursionStep = coercedRecursionStep.getNode();
    List<Symbol> mappings = coercedRecursionStep.getFields();
    // unroll recursion
    int maxRecursionDepth = getMaxRecursionDepth(session);
    for (int i = 0; i < maxRecursionDepth; i++) {
        recursionSteps.add(copy(recursionStep, mappings));
        NodeAndMappings replacement = copy(recursionStep, mappings);
        // if the recursion step plan has duplicate output symbols, add projection on top to make the symbols unique
        // This is necessary to successfully unroll recursion: the relation on the next recursion step must follow
        // the same layout while it might not have duplicate outputs where the plan for this step did
        replacement = disambiguateOutputs(replacement, symbolAllocator, idAllocator);
        recursionStep = replace(recursionStep, replacementSpot, replacement);
        replacementSpot = replacement;
    }
    // after the last recursion step, check if the recursion converged. the last step is expected to return empty result
    // 1. append window to count rows
    NodeAndMappings checkConvergenceStep = copy(recursionStep, mappings);
    Symbol countSymbol = symbolAllocator.newSymbol("count", BIGINT);
    ResolvedFunction function = plannerContext.getMetadata().resolveFunction(session, QualifiedName.of("count"), ImmutableList.of());
    WindowNode.Function countFunction = new WindowNode.Function(function, ImmutableList.of(), DEFAULT_FRAME, false);
    WindowNode windowNode = new WindowNode(idAllocator.getNextId(), checkConvergenceStep.getNode(), new WindowNode.Specification(ImmutableList.of(), Optional.empty()), ImmutableMap.of(countSymbol, countFunction), Optional.empty(), ImmutableSet.of(), 0);
    // 2. append filter to fail on non-empty result
    ResolvedFunction fail = plannerContext.getMetadata().resolveFunction(session, QualifiedName.of("fail"), fromTypes(VARCHAR));
    String recursionLimitExceededMessage = format("Recursion depth limit exceeded (%s). Use 'max_recursion_depth' session property to modify the limit.", maxRecursionDepth);
    Expression predicate = new IfExpression(new ComparisonExpression(GREATER_THAN_OR_EQUAL, countSymbol.toSymbolReference(), new GenericLiteral("BIGINT", "0")), new Cast(new FunctionCall(fail.toQualifiedName(), ImmutableList.of(new Cast(new StringLiteral(recursionLimitExceededMessage), toSqlType(VARCHAR)))), toSqlType(BOOLEAN)), TRUE_LITERAL);
    FilterNode filterNode = new FilterNode(idAllocator.getNextId(), windowNode, predicate);
    recursionSteps.add(new NodeAndMappings(filterNode, checkConvergenceStep.getFields()));
    // union all the recursion steps
    List<NodeAndMappings> recursionStepsToUnion = recursionSteps.build();
    List<Symbol> unionOutputSymbols = anchorPlan.getFieldMappings().stream().map(symbol -> symbolAllocator.newSymbol(symbol, "_expanded")).collect(toImmutableList());
    ImmutableListMultimap.Builder<Symbol, Symbol> unionSymbolMapping = ImmutableListMultimap.builder();
    for (NodeAndMappings plan : recursionStepsToUnion) {
        for (int i = 0; i < unionOutputSymbols.size(); i++) {
            unionSymbolMapping.put(unionOutputSymbols.get(i), plan.getFields().get(i));
        }
    }
    List<PlanNode> nodesToUnion = recursionStepsToUnion.stream().map(NodeAndMappings::getNode).collect(toImmutableList());
    PlanNode result = new UnionNode(idAllocator.getNextId(), nodesToUnion, unionSymbolMapping.build(), unionOutputSymbols);
    if (union.isDistinct()) {
        result = new AggregationNode(idAllocator.getNextId(), result, ImmutableMap.of(), singleGroupingSet(result.getOutputSymbols()), ImmutableList.of(), AggregationNode.Step.SINGLE, Optional.empty(), Optional.empty());
    }
    return new RelationPlan(result, anchorPlan.getScope(), unionOutputSymbols, outerContext);
}

Example 22 with GenericLiteral

use of io.trino.sql.tree.GenericLiteral in project trino by trinodb.

the class LogicalPlanner method planStatement.

public PlanNode planStatement(Analysis analysis, Statement statement) {
    if ((statement instanceof CreateTableAsSelect && analysis.getCreate().orElseThrow().isCreateTableAsSelectNoOp()) || statement instanceof RefreshMaterializedView && analysis.isSkipMaterializedViewRefresh()) {
        Symbol symbol = symbolAllocator.newSymbol("rows", BIGINT);
        PlanNode source = new ValuesNode(idAllocator.getNextId(), ImmutableList.of(symbol), ImmutableList.of(new Row(ImmutableList.of(new GenericLiteral("BIGINT", "0")))));
        return new OutputNode(idAllocator.getNextId(), source, ImmutableList.of("rows"), ImmutableList.of(symbol));
    }
    return createOutputPlan(planStatementWithoutOutput(analysis, statement), analysis);
}

Example 23 with GenericLiteral

use of io.trino.sql.tree.GenericLiteral in project trino by trinodb.

the class GroupingOperationRewriter method rewriteGroupingOperation.

public static Expression rewriteGroupingOperation(GroupingOperation expression, List<Set<Integer>> groupingSets, Map<NodeRef<Expression>, ResolvedField> columnReferenceFields, Optional<Symbol> groupIdSymbol) {
    requireNonNull(groupIdSymbol, "groupIdSymbol is null");
    // See SQL:2011:4.16.2 and SQL:2011:6.9.10.
    if (groupingSets.size() == 1) {
        return new LongLiteral("0");
    } else {
        checkState(groupIdSymbol.isPresent(), "groupId symbol is missing");
        RelationId relationId = columnReferenceFields.get(NodeRef.of(expression.getGroupingColumns().get(0))).getFieldId().getRelationId();
        List<Integer> columns = expression.getGroupingColumns().stream().map(NodeRef::of).peek(groupingColumn -> checkState(columnReferenceFields.containsKey(groupingColumn), "the grouping column is not in the columnReferencesField map")).map(columnReferenceFields::get).map(ResolvedField::getFieldId).map(fieldId -> translateFieldToInteger(fieldId, relationId)).collect(toImmutableList());
        List<Expression> groupingResults = groupingSets.stream().map(groupingSet -> String.valueOf(calculateGrouping(groupingSet, columns))).map(LongLiteral::new).collect(toImmutableList());
        // It is necessary to add a 1 to the groupId because the underlying array is indexed starting at 1
        return new SubscriptExpression(new ArrayConstructor(groupingResults), new ArithmeticBinaryExpression(ADD, groupIdSymbol.get().toSymbolReference(), new GenericLiteral("BIGINT", "1")));
    }
}