executor: forbid stale read table with tiflash (#25561)

pingcap · Jun 18, 2021 · 5794e8c · 5794e8c
1 parent 799591a
commit 5794e8c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/executor/builder.go b/executor/builder.go
@@ -2755,6 +2755,10 @@ func (b *executorBuilder) buildMPPGather(v *plannercore.PhysicalTableReader) Exe
 // buildTableReader builds a table reader executor. It first build a no range table reader,
 // and then update it ranges from table scan plan.
 func (b *executorBuilder) buildTableReader(v *plannercore.PhysicalTableReader) Executor {
+	if v.StoreType != kv.TiKV && b.explicitStaleness {
+		b.err = errors.New("stale requests require tikv backend")
+		return nil
+	}
 	failpoint.Inject("checkUseMPP", func(val failpoint.Value) {
 		if val.(bool) != useMPPExecution(b.ctx, v) {
 			if val.(bool) {