Package org.jboss.dna.graph.query.model

Examples of org.jboss.dna.graph.query.model.Join

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                context.getProblems().addError(GraphI18n.tableDoesNotExist, selector.getName());
            }
            return node;
        }
        if (source instanceof Join) {
            Join join = (Join)source;
            // Set up new join node corresponding to this join predicate
            PlanNode node = new PlanNode(Type.JOIN);
            node.setProperty(Property.JOIN_TYPE, join.getType());
            node.setProperty(Property.JOIN_ALGORITHM, JoinAlgorithm.NESTED_LOOP);
            node.setProperty(Property.JOIN_CONDITION, join.getJoinCondition());

            context.getHints().hasJoin = true;
            if (join.getType() == JoinType.LEFT_OUTER) {
                context.getHints().hasOptionalJoin = true;
            }

            // Handle each child
            Source[] clauses = new Source[] {join.getLeft(), join.getRight()};
            for (int i = 0; i < 2; i++) {
                PlanNode sourceNode = createPlanNode(context, clauses[i], usedSelectors);
                node.addLastChild(sourceNode);

                // Add selectors to the joinNode
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        protected QueryBuilder createJoin( JoinCondition condition ) {
            // CROSS joins have a higher precedence, so we may need to adjust the existing left side in this case...
            if (type == JoinType.CROSS && source instanceof Join && ((Join)source).getType() != JoinType.CROSS) {
                // A CROSS join follows a non-CROSS join, so the CROSS join becomes precendent ...
                Join left = (Join)source;
                Join cross = new Join(left.getRight(), type, rightSource, condition);
                source = new Join(left.getLeft(), left.getType(), cross, left.getJoinCondition());
            } else {
                // Otherwise, just create using usual precedence ...
                source = new Join(source, type, rightSource, condition);
            }
            return QueryBuilder.this;
        }
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            // Read the name of the selector on the right side of the join ...
            NamedSelector right = parseNamedSelector(tokens);
            // Read the join condition ...
            JoinCondition joinCondition = parseJoinCondition(tokens, typeSystem);
            // Create the join ...
            source = new Join(source, joinType, right, joinCondition);
        }
        return source;
    }
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Related Classes of org.jboss.dna.graph.query.model.Join

  • org.jboss.dna.graph.query.parse.SqlQueryParser
  • org.jboss.dna.graph.query.plan.CanonicalPlanner
  • org.jboss.dna.graph.query.QueryBuilder$JoinClause
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