constraint example

Author: JPryce-Aklundh

modules/ROOT/pages/patterns/shortest-paths.adoc

@@ -690,7 +690,7 @@ As a result, the simpler shortest path query (without a `CALL` subquery) will no
 ----
 PROFILE
 MATCH p = ANY SHORTEST
-  (source:N {trail: ["C", "C", "A", "C", "A", "B", "B", "B", "A"]})--+
+  (source:N {trail: ["C", "C", "A", "C", "A", "B", "B", "B", "A"]})--{2,}
   (target:N {trail: ["A", "B", "C", "A", "B", "C", "A", "B", "C"]})
 RETURN length(p) AS pathLength
 ----
@@ -701,13 +701,13 @@ RETURN length(p) AS pathLength
 +------------------------------------+----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------+
 | Operator                           | Id | Details                                                                                            | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline      |
 +------------------------------------+----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------+
-| +ProduceResults                    |  0 | `length(p)`                                                                                        |              1 |    1 |       0 |              0 |                    0/0 |     0.034 |               |
+| +ProduceResults                    |  0 | pathLength                                                                                         |              1 |    1 |       0 |              0 |                    0/0 |     0.104 |               |
 | |                                  +----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+               |
-| +Projection                        |  1 | length((source)-[anon_19*]-(target)) AS `length(p)`                                                |              1 |    1 |      17 |                |                    9/0 |     0.057 |               |
+| +Projection                        |  1 | length((source)-[anon_23*]-(target)) AS pathLength                                                 |              1 |    1 |      17 |                |                    9/0 |     0.133 |               |
 | |                                  +----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+               |
-| +StatefulShortestPath(Into, Trail) |  2 | SHORTEST 1 (source) ((`anon_15`)-[`anon_16`]-(`anon_17`)){1, } (target)                            |              1 |    1 |    1936 |         990288 |                  205/0 |     1.658 | In Pipeline 1 |
+| +StatefulShortestPath(Into, Trail) |  2 | SHORTEST 1 (source) ((`anon_19`)-[`anon_20`]-(`anon_21`)){2, } (target)                            |              1 |    1 |    1952 |        1337584 |                  209/0 |     2.274 | In Pipeline 1 |
 | |                                  +----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------+
-| +MultiNodeIndexSeek                |  3 | UNIQUE source:N(trail) WHERE trail = $autolist_0, UNIQUE target:N(trail) WHERE trail = $autolist_1 |              1 |    1 |       4 |            376 |                    4/2 |     0.332 | In Pipeline 0 |
+| +MultiNodeIndexSeek                |  3 | UNIQUE source:N(trail) WHERE trail = $autolist_0, UNIQUE target:N(trail) WHERE trail = $autolist_1 |              1 |    1 |       4 |            376 |                    1/5 |     3.688 | In Pipeline 0 |
 +------------------------------------+----+----------------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------+
 
 Total database accesses: 1957, total allocated memory: 990608