Fix a bug in the prefiltering.

joka921 · joka921 · commit caef3f99c934 · 2026-02-04T15:40:12.000+01:00
Signed-off-by: Johannes Kalmbach &lt;johannes.kalmbach@gmail.com&gt;
diff --git a/src/engine/IndexScan.cpp b/src/engine/IndexScan.cpp
@@ -836,7 +836,8 @@ std::pair<Result::LazyResult, Result::LazyResult> IndexScan::prefilterTables(
 
   if (!metaBlocks.has_value()) {
     // Return empty results
-    return {Result::LazyResult{}, Result::LazyResult{}};
+    return {filterLeftSide ? Result::LazyResult{} : std::move(input),
+            Result::LazyResult{}};
   }
 
   auto state = std::make_shared<SharedGeneratorState>(

Original file line number	Diff line number	Diff line change
`@@ -836,7 +836,8 @@ std::pair<Result::LazyResult, Result::LazyResult> IndexScan::prefilterTables(`
`836`	`836`
`837`	`837`	`if (!metaBlocks.has_value()) {`
`838`	`838`	`// Return empty results`
`839`		`- return {Result::LazyResult{}, Result::LazyResult{}};`
	`839`	`+ return {filterLeftSide ? Result::LazyResult{} : std::move(input),`
	`840`	`+ Result::LazyResult{}};`
`840`	`841`	`}`
`841`	`842`
`842`	`843`	`auto state = std::make_shared<SharedGeneratorState>(`