(hop) branch main updated: Issue #8755 : Allow FalkorDB vector scores within 1e-3 of the exact similarity (#8837)

[mcasters]

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mattcasters pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/hop.git


The following commit(s) were added to refs/heads/main by this push:
     new 950d0264f6 Issue #8755 : Allow FalkorDB vector scores within 1e-3 of 
the exact similarity (#8837)
950d0264f6 is described below

commit 950d0264f6a543688458dedd52c86f7b45344b22
Author: Matt Casters <mattcast...@gmail.com>
AuthorDate: Sat Oct 10 11:06:19 2026 +0200

    Issue #8755 : Allow FalkorDB vector scores within 1e-3 of the exact 
similarity (#8837)
    
    Nightly integration build 2336 fails FalkorDbIT on the cosine score of the
    second hit: 0.780990362167358 against an exact 0.7808688094430303, past the
    1e-4 tolerance. The same image returns the exact cosine here, so the index
    distance depends on the host. 1e-3 covers that result and stays more than
    0.01 away from the euclidean score for these vectors.
    
    fixes #8755
---
 .../src/test/java/org/apache/hop/falkordb/FalkorDbIT.java         | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git 
a/plugins/tech/falkordb/src/test/java/org/apache/hop/falkordb/FalkorDbIT.java 
b/plugins/tech/falkordb/src/test/java/org/apache/hop/falkordb/FalkorDbIT.java
index 18dd97b3df..79f94b7137 100644
--- 
a/plugins/tech/falkordb/src/test/java/org/apache/hop/falkordb/FalkorDbIT.java
+++ 
b/plugins/tech/falkordb/src/test/java/org/apache/hop/falkordb/FalkorDbIT.java
@@ -397,8 +397,12 @@ class FalkorDbIT {
     }
   }
 
-  /** The vectors are stored as 32 bit floats. */
-  private static final double SCORE_TOLERANCE = 1e-4;
+  /**
+   * FalkorDB stores the vectors as 32-bit floats. Its vector index has 
returned the cosine
+   * similarity 1.2e-4 away from the exact value, which nightly integration 
build 2336 rejected at
+   * 1e-4. 1e-3 still leaves the cosine and euclidean scores for these vectors 
more than 0.01 apart.
+   */
+  private static final double SCORE_TOLERANCE = 1e-3;
 
   /**
    * The score for the query vector [0.9, 0.1, 0] and the stored vectors [1, 
0, 0] and [0.7, 0.7,