Faster indexed general join algorithm

1 files changed, 11 insertions, 0 deletions

diff --git a/vespajlib/src/test/java/com/yahoo/tensor/functions/JoinTestCase.java b/vespajlib/src/test/java/com/yahoo/tensor/functions/JoinTestCase.java
index f2b55c74066..bc2d1f21717 100644
--- a/vespajlib/src/test/java/com/yahoo/tensor/functions/JoinTestCase.java
+++ b/vespajlib/src/test/java/com/yahoo/tensor/functions/JoinTestCase.java
@@ -34,4 +34,15 @@ public class JoinTestCase {
                      t2.divide(t1));
     }
     
+    @Test
+    public void testGeneralJoin() {
+        assertEquals(Tensor.from("tensor(x[],y[]):{ {x:0,y:0}:1, {x:1,y:0}:2, {x:2,y:0}:3 }"), 
+                     Tensor.from("tensor(x[]):{ {x:0}:2, {x:1}:4, {x:2}:6 }")
+                                 .divide(Tensor.from("tensor(y[]):{{y:0}:2}")));
+
+        assertEquals(Tensor.from("tensor(x[],y[],z[]):{ {x:0,y:0,z:0}:3, {x:1,y:0,z:0}:4, {x:0,y:1,z:0}:5, {x:1,y:1,z:0}:6 }"),
+                     Tensor.from("tensor(x[],y[]):{ {x:0,y:0}:6, {x:1,y:0}:8, {x:0,y:1}:20, {x:1,y:1}:24 }")
+                             .divide(Tensor.from("tensor(y[],z[]):{ {y:0,z:0}:2, {y:1,z:0}:4, {y:2,z:0}:6 }")));
+    }
+    
 }