Examples with CommonExecSink org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecSink used on opensource projects

Example 1 with CommonExecSink

use of org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecSink in project flink by apache.

the class ExecNodePlanDumper method dagToString.

/**
 * Converts an {@link ExecNode} DAG to a string as a tree style.
 *
 * <p>The following DAG of {@link ExecNode}
 *
 * <pre>{@code
 *    Sink1    Sink2
 *     |        |
 *  Filter3  Filter4
 *      \     /
 *       Join
 *     /      \
 * Filter1  Filter2
 *    \     /
 *    Project
 *      |
 *    Scan
 * }</pre>
 *
 * <p>would be converted to the tree style as following:
 *
 * <pre>{@code
 * Join(reuse_id=[2])
 * :- Filter1
 * :  +- Project(reuse_id=[1])
 * :     +- Scan
 * +- Filter2
 *    +- Reused(reference_id=[1])
 *
 * Sink1
 * +- Filter3
 *    +- Reused(reference_id=[2])
 *
 * Sink2
 * +- Filter4
 *    +- Reused(reference_id=[2])
 * }</pre>
 *
 * @param nodes the ExecNodes to convert
 * @return the plan of ExecNode
 */
public static String dagToString(List<ExecNode<?>> nodes) {
    Preconditions.checkArgument(nodes != null && !nodes.isEmpty(), "nodes should not be null or empty.");
    if (nodes.size() == 1) {
        return treeToString(nodes.get(0));
    }
    // nodes that stop visit when meet them
    final List<ExecNode<?>> stopVisitNodes = new ArrayList<>();
    final StringBuilder sb = new StringBuilder();
    final DagReuseInfo reuseInfo = new DagReuseInfo(nodes, new ArrayList<>());
    final ExecNodeVisitor visitor = new ExecNodeVisitorImpl() {

        @Override
        public void visit(ExecNode<?> node) {
            int visitedTimes = reuseInfo.addVisitedTimes(node);
            boolean isFirstVisit = visitedTimes == 1;
            if (isFirstVisit) {
                super.visit(node);
            }
            int reuseId = reuseInfo.getReuseId(node);
            boolean isReuseNode = reuseId >= 0;
            if (node instanceof CommonExecLegacySink || node instanceof CommonExecSink || (isReuseNode && isFirstVisit)) {
                if (isReuseNode) {
                    reuseInfo.setFirstVisited(node, true);
                }
                String reusePlan = doConvertTreeToString(node, reuseInfo, false, stopVisitNodes, false);
                sb.append(reusePlan).append(System.lineSeparator());
                if (isReuseNode) {
                    // update visit info after the reuse node visited
                    stopVisitNodes.add(node);
                    reuseInfo.setFirstVisited(node, false);
                }
            }
        }
    };
    nodes.forEach(visitor::visit);
    if (sb.length() > 0) {
        // delete last line separator
        sb.deleteCharAt(sb.length() - 1);
    }
    return sb.toString();
}