reinit-opaque.patch

diff --git a/src/backend/access/brin/brin.c b/src/backend/access/brin/brin.c
index bd35cf6..441127f 100644
--- a/src/backend/access/brin/brin.c
+++ b/src/backend/access/brin/brin.c
@@ -519,6 +519,7 @@ brinrescan(PG_FUNCTION_ARGS)
 {
 	IndexScanDesc scan = (IndexScanDesc) PG_GETARG_POINTER(0);
 	ScanKey		scankey = (ScanKey) PG_GETARG_POINTER(1);
+	BrinOpaque *opaque;
 
 	/* other arguments ignored */
 
@@ -526,6 +527,14 @@ brinrescan(PG_FUNCTION_ARGS)
 		memmove(scan->keyData, scankey,
 				scan->numberOfKeys * sizeof(ScanKeyData));
 
+	/*
+	 * Reinitialize the opaque struct; some opclasses might choose to
+	 * cache per-scan info in there.
+	 */
+	opaque = (BrinOpaque *) scan->opaque;
+	brin_free_desc(opaque->bo_bdesc);
+	opaque->bo_bdesc = brin_build_desc(scan->indexRelation);
+
 	PG_RETURN_VOID();
 }