From 7ad03e8b96e9a09fcca04dd5c926abae6a69f5df Mon Sep 17 00:00:00 2001
From: Alex Kasko <alex@staticlibs.net>
Date: Tue, 20 Oct 2026 17:10:59 +0100
Subject: [PATCH] Fix floating point comparison in Spark test

---
 src/test/external/RunSpark.java | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/test/external/RunSpark.java b/src/test/external/RunSpark.java
index bd75f8e6d..37a44b517 100644
--- a/src/test/external/RunSpark.java
+++ b/src/test/external/RunSpark.java
@@ -18,7 +18,7 @@ public static void main(String[] args) throws Exception {
         System.out.print(output);
         int status = ps.waitFor();
         String[] lines = output.split("\n");
-        if (lines.length < 2 || !"7433139".equals(lines[0]) || !"1.429378704487457E8".equals(lines[1])) {
+        if (lines.length < 2 || !"7433139".equals(lines[0]) || !sumMatches(lines[1])) {
             throw new RuntimeException("Spark SQL test output check failed");
         }
         if (status == 0) {
@@ -27,6 +27,18 @@ public static void main(String[] args) throws Exception {
         System.exit(status);
     }
 
+    // Sum of FLOAT values depends on the order in which they are added, physical row order
+    // of the DuckLake table is not stable across setups, so the last digits can differ.
+    static boolean sumMatches(String line) {
+        double expected = 1.429378704487457E8;
+        try {
+            double actual = Double.parseDouble(line.trim());
+            return Math.abs(actual - expected) <= Math.abs(expected) * 1e-9;
+        } catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
     static String fromEnv(String envVarName, String defaultValue) {
         String env = System.getenv(envVarName);
         if (null != env) {