Add an error message to append precondition

trinodb · Jun 13, 2023 · 858af73 · 858af73
1 parent c208ad8
commit 858af73
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/core/trino-main/src/main/java/io/trino/operator/output/RleAwarePositionsAppender.java b/core/trino-main/src/main/java/io/trino/operator/output/RleAwarePositionsAppender.java
@@ -54,7 +54,7 @@ public void append(IntArrayList positions, Block source)
     {
         // RleAwarePositionsAppender should be used with UnnestingPositionsAppender that makes sure
         // append is called only with flat block
-        checkArgument(!(source instanceof RunLengthEncodedBlock));
+        checkArgument(!(source instanceof RunLengthEncodedBlock), "Append should be called with flat block but got %s", source);
         switchToFlat();
         delegate.append(positions, source);
     }