Examples of org.modeshape.jcr.query.model.Query.columns()

            }
            orderByBuilder.end();
        }
        // Try building this query, because we need to check the # of columns selected and the # of sources ...
        Query query = (Query)builder.query();
        if (query.columns().isEmpty() && query.source() instanceof AllNodes) {
            // This is basically 'SELECT * FROM __ALLNODES__", which means that no type was explicitly specified and
            // nothing was selected from that type. According to JCR 1.0 Section 6.6.3.1, this equates to
            // 'SELECT * FROM [nt:base]', and since there is just one property on nt:base (but many on __ALLNODES__)
            // this really equates to 'SELECT [jcr:primaryType] FROM __ALLNODES__'.
            builder.select("jcr:primaryType");

        // See if we have to rewrite the JCR-SQL-style join ...
        if (query.source() instanceof JoinableSources) {
            JoinableSources joinableSources = (JoinableSources)query.source();
            // Rewrite the joins ...
            Source newSource = rewrite(joinableSources);
            query = new Query(newSource, query.constraint(), query.orderings(), query.columns(), query.getLimits(),
                              query.isDistinct());
        }
        return query;
    }

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