Examples with RelationId io.trino.sql.analyzer.RelationId used on opensource projects

Example 1 with RelationId

use of io.trino.sql.analyzer.RelationId 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")));
    }
}