planner/core: pass the elems info to fieldtype only for exchanger

executor/tiflash_test.go

@@ -271,3 +271,20 @@ func (s *tiflashTestSuite) TestPartitionTable(c *C) {
 	failpoint.Disable("github.com/pingcap/tidb/executor/checkTotalMPPTasks")
 	failpoint.Disable("github.com/pingcap/tidb/executor/checkUseMPP")
 }
+
+func (s *tiflashTestSuite) TestMppEnum(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t(a int not null primary key, b enum('aca','bca','zca'))")
+	tk.MustExec("alter table t set tiflash replica 1")
+	tb := testGetTableByName(c, tk.Se, "test", "t")
+	err := domain.GetDomain(tk.Se).DDL().UpdateTableReplicaInfo(tk.Se, tb.Meta().ID, true)
+	c.Assert(err, IsNil)
+	tk.MustExec("insert into t values(1,'aca')")
+	tk.MustExec("insert into t values(2,'bca')")
+	tk.MustExec("insert into t values(3,'zca')")
+	tk.MustExec("set @@session.tidb_isolation_read_engines=\"tiflash\"")
+	tk.MustExec("set @@session.tidb_allow_mpp=ON")
+	tk.MustQuery("select t1.b from t t1 join t t2 on t1.a = t2.a order by t1.b").Check(testkit.Rows("aca", "bca", "zca"))
+}

go.mod

@@ -49,7 +49,7 @@ require (
 	github.com/pingcap/parser v0.0.0-20210303061548-f6776f61e268
 	github.com/pingcap/sysutil v0.0.0-20210221112134-a07bda3bde99
 	github.com/pingcap/tidb-tools v4.0.9-0.20201127090955-2707c97b3853+incompatible
-	github.com/pingcap/tipb v0.0.0-20210308034246-066a76fd4e1b
+	github.com/pingcap/tipb v0.0.0-20210309080453-72c4feaa6da7
 	github.com/prometheus/client_golang v1.5.1
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.9.1

go.sum

@@ -422,8 +422,8 @@ github.com/pingcap/sysutil v0.0.0-20210221112134-a07bda3bde99 h1:/ogXgm4guJzow4U
 github.com/pingcap/sysutil v0.0.0-20210221112134-a07bda3bde99/go.mod h1:EB/852NMQ+aRKioCpToQ94Wl7fktV+FNnxf3CX/TTXI=
 github.com/pingcap/tidb-tools v4.0.9-0.20201127090955-2707c97b3853+incompatible h1:ceznmu/lLseGHP/jKyOa/3u/5H3wtLLLqkH2V3ssSjg=
 github.com/pingcap/tidb-tools v4.0.9-0.20201127090955-2707c97b3853+incompatible/go.mod h1:XGdcy9+yqlDSEMTpOXnwf3hiTeqrV6MN/u1se9N8yIM=
-github.com/pingcap/tipb v0.0.0-20210308034246-066a76fd4e1b h1:AvGm1DqSEwbGgiiu3KVuTtwLl3MqhbwwnJpx82l6/7M=
-github.com/pingcap/tipb v0.0.0-20210308034246-066a76fd4e1b/go.mod h1:nsEhnMokcn7MRqd2J60yxpn/ac3ZH8A6GOJ9NslabUo=
+github.com/pingcap/tipb v0.0.0-20210309080453-72c4feaa6da7 h1:j8MkWmy5tduhHVsdsgZJugN1U9OWTMSBQoZIpn8kqPc=
+github.com/pingcap/tipb v0.0.0-20210309080453-72c4feaa6da7/go.mod h1:nsEhnMokcn7MRqd2J60yxpn/ac3ZH8A6GOJ9NslabUo=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=

planner/core/plan_to_pb.go

@@ -16,6 +16,7 @@ package core
 import (
 	"github.com/pingcap/errors"
 	"github.com/pingcap/parser/model"
+	"github.com/pingcap/parser/mysql"
 	"github.com/pingcap/tidb/distsql"
 	"github.com/pingcap/tidb/expression"
 	"github.com/pingcap/tidb/expression/aggregation"
@@ -280,7 +281,13 @@ func (e *PhysicalExchangeReceiver) ToPB(ctx sessionctx.Context, storeType kv.Sto
 
 	fieldTypes := make([]*tipb.FieldType, 0, len(e.Schema().Columns))
 	for _, column := range e.Schema().Columns {
-		fieldTypes = append(fieldTypes, expression.ToPBFieldType(column.RetType))
+		pbType := expression.ToPBFieldType(column.RetType)
+		if column.RetType.Tp == mysql.TypeEnum {
+			for _, e := range column.RetType.Elems {
+				pbType.Elems = append(pbType.Elems, e)
+			}
+		}
+		fieldTypes = append(fieldTypes, pbType)
 	}
 	ecExec := &tipb.ExchangeReceiver{
 		EncodedTaskMeta: encodedTask,

store/mockstore/unistore/cophandler/mpp.go

@@ -132,7 +132,13 @@ func (b *mppExecBuilder) buildMPPExchangeReceiver(pb *tipb.ExchangeReceiver) (*e
 	}
 
 	for _, pbType := range pb.FieldTypes {
-		e.fieldTypes = append(e.fieldTypes, expression.FieldTypeFromPB(pbType))
+		tp := expression.FieldTypeFromPB(pbType)
+		if tp.Tp == mysql.TypeEnum {
+			for _, elem := range pbType.Elems {
+				tp.Elems = append(tp.Elems, elem)
+			}
+		}
+		e.fieldTypes = append(e.fieldTypes, tp)
 	}
 	return e, nil
 }