ddl: persist index info after changing backfill state (#40229)

ddl/index.go

@@ -774,6 +774,9 @@ func doReorgWorkForCreateIndexMultiSchema(w *worker, d *ddlCtx, t *meta.Meta, jo
 		done, ver, err = doReorgWorkForCreateIndex(w, d, t, job, tbl, indexInfo)
 		if done {
 			job.MarkNonRevertible()
+			if err == nil {
+				ver, err = updateVersionAndTableInfo(d, t, job, tbl.Meta(), true)
+			}
 		}
 		// We need another round to wait for all the others sub-jobs to finish.
 		return false, ver, err
@@ -857,7 +860,7 @@ func doReorgWorkForCreateIndex(w *worker, d *ddlCtx, t *meta.Meta, job *model.Jo
 			return false, ver, err
 		}
 		indexInfo.BackfillState = model.BackfillStateInapplicable // Prevent double-write on this index.
-		return true, ver, nil
+		return true, ver, err
 	default:
 		return false, 0, dbterror.ErrInvalidDDLState.GenWithStackByArgs("backfill", indexInfo.BackfillState)
 	}

ddl/multi_schema_change_test.go

@@ -1208,6 +1208,17 @@ func TestMultiSchemaChangeSchemaVersion(t *testing.T) {
 	dom.DDL().SetHook(originHook)
 }
 
+func TestMultiSchemaChangeAddIndexChangeColumn(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test;")
+	tk.MustExec("CREATE TABLE t (a SMALLINT DEFAULT '30219', b TIME NULL DEFAULT '02:45:06', PRIMARY KEY (a));")
+	tk.MustExec("ALTER TABLE t ADD unique INDEX idx4 (b), change column a e MEDIUMINT DEFAULT '5280454' FIRST;")
+	tk.MustExec("insert ignore into t (e) values (5586359),(501788),(-5961048),(220083),(-4917129),(-7267211),(7750448);")
+	tk.MustQuery("select * from t;").Check(testkit.Rows("5586359 02:45:06"))
+	tk.MustExec("admin check table t;")
+}
+
 func TestMultiSchemaChangeMixedWithUpdate(t *testing.T) {
 	store, dom := testkit.CreateMockStoreAndDomain(t)
 	tk := testkit.NewTestKit(t, store)

executor/batch_checker.go

@@ -181,7 +181,7 @@ func getKeysNeedCheckOneRow(ctx sessionctx.Context, t table.Table, row []types.D
 			continue
 		}
 		// If index is used ingest ways, then we should check key from temp index.
-		if v.Meta().BackfillState != model.BackfillStateInapplicable {
+		if v.Meta().State != model.StatePublic && v.Meta().BackfillState != model.BackfillStateInapplicable {
 			_, key, _ = tables.GenTempIdxKeyByState(v.Meta(), key)
 		}
 		colValStr, err1 := formatDataForDupError(colVals)