Address review feedback

Author: JamesGuthrie

pkg/pgmodel/querier/query_builder.go

@@ -260,7 +260,7 @@ func canAttemptPushdown(metadata *promqlMetadata) bool {
 
 	// We can't handle offsets in pushdowns
 	vs, isVectorSelector := queryHints.CurrentNode.(*parser.VectorSelector)
-	if isVectorSelector && (vs.Offset != 0 || vs.OriginalOffset != 0) {
+	if isVectorSelector && vs.Offset != 0 {
 		return false
 	}
 

pkg/tests/end_to_end_tests/promql_query_endpoint_test.go

@@ -2507,7 +2507,7 @@ func TestPromQLQueryEndpoint(t *testing.T) {
 			query: `sum(rate(metric_2{foo = "bar"}[5m]))/sum(rate(metric_2[5m]))`,
 		},
 		{
-			name:  "pushdown with offset",
+			name:  "delta function over range selector with offset",
 			query: `delta(metric_2[1m] offset 3m)`,
 		},
 	}