Merge branch 'master' into debug_cpu_usage

br/pkg/lightning/backend/kv/sql2kv.go

@@ -169,7 +169,7 @@ func collectGeneratedColumns(se *session, meta *model.TableInfo, cols []*table.C
 	var genCols []genCol
 	for i, col := range cols {
 		if col.GeneratedExpr != nil {
-			expr, err := expression.RewriteAstExpr(se, col.GeneratedExpr, schema, names)
+			expr, err := expression.RewriteAstExpr(se, col.GeneratedExpr, schema, names, false)
 			if err != nil {
 				return nil, err
 			}

ddl/ddl_api.go

@@ -6164,7 +6164,7 @@ func (d *ddl) CreatePrimaryKey(ctx sessionctx.Context, ti ast.Ident, indexName m
 	// After DDL job is put to the queue, and if the check fail, TiDB will run the DDL cancel logic.
 	// The recover step causes DDL wait a few seconds, makes the unit test painfully slow.
 	// For same reason, decide whether index is global here.
-	indexColumns, err := buildIndexColumns(ctx, tblInfo.Columns, indexPartSpecifications)
+	indexColumns, _, err := buildIndexColumns(ctx, tblInfo.Columns, indexPartSpecifications)
 	if err != nil {
 		return errors.Trace(err)
 	}
@@ -6274,7 +6274,7 @@ func BuildHiddenColumnInfo(ctx sessionctx.Context, indexPartSpecifications []*as
 		if err != nil {
 			return nil, errors.Trace(err)
 		}
-		expr, err := expression.RewriteSimpleExprWithTableInfo(ctx, tblInfo, idxPart.Expr)
+		expr, err := expression.RewriteSimpleExprWithTableInfo(ctx, tblInfo, idxPart.Expr, true)
 		if err != nil {
 			// TODO: refine the error message.
 			return nil, err
@@ -6389,7 +6389,7 @@ func (d *ddl) createIndex(ctx sessionctx.Context, ti ast.Ident, keyType ast.Inde
 	// After DDL job is put to the queue, and if the check fail, TiDB will run the DDL cancel logic.
 	// The recover step causes DDL wait a few seconds, makes the unit test painfully slow.
 	// For same reason, decide whether index is global here.
-	indexColumns, err := buildIndexColumns(ctx, finalColumns, indexPartSpecifications)
+	indexColumns, _, err := buildIndexColumns(ctx, finalColumns, indexPartSpecifications)
 	if err != nil {
 		return errors.Trace(err)
 	}

ddl/ddl_worker.go

@@ -536,16 +536,20 @@ func cleanMDLInfo(pool *sessionPool, jobID int64, ec *clientv3.Client) {
 }
 
 // checkMDLInfo checks if metadata lock info exists. It means the schema is locked by some TiDBs if exists.
-func checkMDLInfo(jobID int64, pool *sessionPool) (bool, error) {
-	sql := fmt.Sprintf("select * from mysql.tidb_mdl_info where job_id = %d", jobID)
+func checkMDLInfo(jobID int64, pool *sessionPool) (bool, int64, error) {
+	sql := fmt.Sprintf("select version from mysql.tidb_mdl_info where job_id = %d", jobID)
 	sctx, _ := pool.get()
 	defer pool.put(sctx)
 	sess := newSession(sctx)
 	rows, err := sess.execute(context.Background(), sql, "check-mdl-info")
 	if err != nil {
-		return false, err
+		return false, 0, err
 	}
-	return len(rows) > 0, nil
+	if len(rows) == 0 {
+		return false, 0, nil
+	}
+	ver := rows[0].GetInt64(0)
+	return true, ver, nil
 }
 
 func needUpdateRawArgs(job *model.Job, meetErr bool) bool {
@@ -1377,6 +1381,32 @@ func waitSchemaChanged(ctx context.Context, d *ddlCtx, waitTime time.Duration, l
 		zap.String("job", job.String()))
 }
 
+// waitSchemaSyncedForMDL likes waitSchemaSynced, but it waits for getting the metadata lock of the latest version of this DDL.
+func waitSchemaSyncedForMDL(d *ddlCtx, job *model.Job, latestSchemaVersion int64) error {
+	failpoint.Inject("checkDownBeforeUpdateGlobalVersion", func(val failpoint.Value) {
+		if val.(bool) {
+			if mockDDLErrOnce > 0 && mockDDLErrOnce != latestSchemaVersion {
+				panic("check down before update global version failed")
+			} else {
+				mockDDLErrOnce = -1
+			}
+		}
+	})
+
+	timeStart := time.Now()
+	// OwnerCheckAllVersions returns only when all TiDB schemas are synced(exclude the isolated TiDB).
+	err := d.schemaSyncer.OwnerCheckAllVersions(context.Background(), job.ID, latestSchemaVersion)
+	if err != nil {
+		logutil.Logger(d.ctx).Info("[ddl] wait latest schema version encounter error", zap.Int64("ver", latestSchemaVersion), zap.Error(err))
+		return err
+	}
+	logutil.Logger(d.ctx).Info("[ddl] wait latest schema version changed(get the metadata lock if tidb_enable_metadata_lock is true)",
+		zap.Int64("ver", latestSchemaVersion),
+		zap.Duration("take time", time.Since(timeStart)),
+		zap.String("job", job.String()))
+	return nil
+}
+
 // waitSchemaSynced handles the following situation:
 // If the job enters a new state, and the worker crashs when it's in the process of waiting for 2 * lease time,
 // Then the worker restarts quickly, we may run the job immediately again,

ddl/fktest/foreign_key_test.go

@@ -319,6 +319,24 @@ func TestCreateTableWithForeignKeyPrivilegeCheck(t *testing.T) {
 	tk2.MustExec("create table t4 (a int, foreign key fk(a) references t1(id), foreign key (a) references t3(id));")
 }
 
+func TestAlterTableWithForeignKeyPrivilegeCheck(t *testing.T) {
+	store, _ := testkit.CreateMockStoreAndDomain(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("create user 'u1'@'%' identified by '';")
+	tk.MustExec("grant create,alter on *.* to 'u1'@'%';")
+	tk.MustExec("create table t1 (id int key);")
+	tk2 := testkit.NewTestKit(t, store)
+	tk2.MustExec("use test")
+	tk2.Session().Auth(&auth.UserIdentity{Username: "u1", Hostname: "localhost", CurrentUser: true, AuthUsername: "u1", AuthHostname: "%"}, nil, []byte("012345678901234567890"))
+	tk2.MustExec("create table t2 (a int)")
+	err := tk2.ExecToErr("alter table t2 add foreign key (a) references t1 (id) on update cascade")
+	require.Error(t, err)
+	require.Equal(t, "[planner:1142]REFERENCES command denied to user 'u1'@'%' for table 't1'", err.Error())
+	tk.MustExec("grant references on test.t1 to 'u1'@'%';")
+	tk2.MustExec("alter table t2 add foreign key (a) references t1 (id) on update cascade")
+}
+
 func TestRenameTableWithForeignKeyMetaInfo(t *testing.T) {
 	store, dom := testkit.CreateMockStoreAndDomain(t)
 	tk := testkit.NewTestKit(t, store)

ddl/generated_column.go

@@ -268,12 +268,14 @@ func checkModifyGeneratedColumn(sctx sessionctx.Context, tbl table.Table, oldCol
 }
 
 type illegalFunctionChecker struct {
-	hasIllegalFunc       bool
-	hasAggFunc           bool
-	hasRowVal            bool // hasRowVal checks whether the functional index refers to a row value
-	hasWindowFunc        bool
-	hasNotGAFunc4ExprIdx bool
-	otherErr             error
+	hasIllegalFunc        bool
+	hasAggFunc            bool
+	hasRowVal             bool // hasRowVal checks whether the functional index refers to a row value
+	hasWindowFunc         bool
+	hasNotGAFunc4ExprIdx  bool
+	hasCastArrayFunc      bool
+	disallowCastArrayFunc bool
+	otherErr              error
 }
 
 func (c *illegalFunctionChecker) Enter(inNode ast.Node) (outNode ast.Node, skipChildren bool) {
@@ -308,7 +310,14 @@ func (c *illegalFunctionChecker) Enter(inNode ast.Node) (outNode ast.Node, skipC
 	case *ast.WindowFuncExpr:
 		c.hasWindowFunc = true
 		return inNode, true
+	case *ast.FuncCastExpr:
+		c.hasCastArrayFunc = c.hasCastArrayFunc || node.Tp.IsArray()
+		if c.disallowCastArrayFunc && node.Tp.IsArray() {
+			c.otherErr = expression.ErrNotSupportedYet.GenWithStackByArgs("Use of CAST( .. AS .. ARRAY) outside of functional index in CREATE(non-SELECT)/ALTER TABLE or in general expressions")
+			return inNode, true
+		}
 	}
+	c.disallowCastArrayFunc = true
 	return inNode, false
 }
 
@@ -355,6 +364,9 @@ func checkIllegalFn4Generated(name string, genType int, expr ast.ExprNode) error
 	if genType == typeIndex && c.hasNotGAFunc4ExprIdx && !config.GetGlobalConfig().Experimental.AllowsExpressionIndex {
 		return dbterror.ErrUnsupportedExpressionIndex
 	}
+	if genType == typeColumn && c.hasCastArrayFunc {
+		return expression.ErrNotSupportedYet.GenWithStackByArgs("Use of CAST( .. AS .. ARRAY) outside of functional index in CREATE(non-SELECT)/ALTER TABLE or in general expressions")
+	}
 	return nil
 }
 

ddl/index.go

@@ -64,26 +64,28 @@ var (
 	telemetryAddIndexIngestUsage = metrics.TelemetryAddIndexIngestCnt
 )
 
-func buildIndexColumns(ctx sessionctx.Context, columns []*model.ColumnInfo, indexPartSpecifications []*ast.IndexPartSpecification) ([]*model.IndexColumn, error) {
+func buildIndexColumns(ctx sessionctx.Context, columns []*model.ColumnInfo, indexPartSpecifications []*ast.IndexPartSpecification) ([]*model.IndexColumn, bool, error) {
 	// Build offsets.
 	idxParts := make([]*model.IndexColumn, 0, len(indexPartSpecifications))
 	var col *model.ColumnInfo
+	var mvIndex bool
 	maxIndexLength := config.GetGlobalConfig().MaxIndexLength
 	// The sum of length of all index columns.
 	sumLength := 0
 	for _, ip := range indexPartSpecifications {
 		col = model.FindColumnInfo(columns, ip.Column.Name.L)
 		if col == nil {
-			return nil, dbterror.ErrKeyColumnDoesNotExits.GenWithStack("column does not exist: %s", ip.Column.Name)
+			return nil, false, dbterror.ErrKeyColumnDoesNotExits.GenWithStack("column does not exist: %s", ip.Column.Name)
 		}
 
 		if err := checkIndexColumn(ctx, col, ip.Length); err != nil {
-			return nil, err
+			return nil, false, err
 		}
+		mvIndex = mvIndex || col.FieldType.IsArray()
 		indexColLen := ip.Length
 		indexColumnLength, err := getIndexColumnLength(col, ip.Length)
 		if err != nil {
-			return nil, err
+			return nil, false, err
 		}
 		sumLength += indexColumnLength
 
@@ -92,12 +94,12 @@ func buildIndexColumns(ctx sessionctx.Context, columns []*model.ColumnInfo, inde
 			// The multiple column index and the unique index in which the length sum exceeds the maximum size
 			// will return an error instead produce a warning.
 			if ctx == nil || ctx.GetSessionVars().StrictSQLMode || mysql.HasUniKeyFlag(col.GetFlag()) || len(indexPartSpecifications) > 1 {
-				return nil, dbterror.ErrTooLongKey.GenWithStackByArgs(maxIndexLength)
+				return nil, false, dbterror.ErrTooLongKey.GenWithStackByArgs(maxIndexLength)
 			}
 			// truncate index length and produce warning message in non-restrict sql mode.
 			colLenPerUint, err := getIndexColumnLength(col, 1)
 			if err != nil {
-				return nil, err
+				return nil, false, err
 			}
 			indexColLen = maxIndexLength / colLenPerUint
 			// produce warning message
@@ -111,7 +113,7 @@ func buildIndexColumns(ctx sessionctx.Context, columns []*model.ColumnInfo, inde
 		})
 	}
 
-	return idxParts, nil
+	return idxParts, mvIndex, nil
 }
 
 // CheckPKOnGeneratedColumn checks the specification of PK is valid.
@@ -154,7 +156,7 @@ func checkIndexColumn(ctx sessionctx.Context, col *model.ColumnInfo, indexColumn
 	}
 
 	// JSON column cannot index.
-	if col.FieldType.GetType() == mysql.TypeJSON {
+	if col.FieldType.GetType() == mysql.TypeJSON && !col.FieldType.IsArray() {
 		if col.Hidden {
 			return dbterror.ErrFunctionalIndexOnJSONOrGeometryFunction
 		}
@@ -263,7 +265,7 @@ func BuildIndexInfo(
 		return nil, errors.Trace(err)
 	}
 
-	idxColumns, err := buildIndexColumns(ctx, allTableColumns, indexPartSpecifications)
+	idxColumns, mvIndex, err := buildIndexColumns(ctx, allTableColumns, indexPartSpecifications)
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
@@ -276,6 +278,7 @@ func BuildIndexInfo(
 		Primary: isPrimary,
 		Unique:  isUnique,
 		Global:  isGlobal,
+		MVIndex: mvIndex,
 	}
 
 	if indexOption != nil {

ddl/job_table.go

@@ -237,7 +237,7 @@ func (d *ddl) delivery2worker(wk *worker, pool *workerPool, job *model.Job) {
 		// check if this ddl job is synced to all servers.
 		if !d.isSynced(job) || d.once.Load() {
 			if variable.EnableMDL.Load() {
-				exist, err := checkMDLInfo(job.ID, d.sessPool)
+				exist, version, err := checkMDLInfo(job.ID, d.sessPool)
 				if err != nil {
 					logutil.BgLogger().Warn("[ddl] check MDL info failed", zap.Error(err), zap.String("job", job.String()))
 					// Release the worker resource.
@@ -246,10 +246,8 @@ func (d *ddl) delivery2worker(wk *worker, pool *workerPool, job *model.Job) {
 				} else if exist {
 					// Release the worker resource.
 					pool.put(wk)
-					err = waitSchemaSynced(d.ddlCtx, job, 2*d.lease)
+					err = waitSchemaSyncedForMDL(d.ddlCtx, job, version)
 					if err != nil {
-						logutil.BgLogger().Warn("[ddl] wait ddl job sync failed", zap.Error(err), zap.String("job", job.String()))
-						time.Sleep(time.Second)
 						return
 					}
 					d.once.Store(false)

ddl/partition.go

@@ -1375,7 +1375,7 @@ func checkPartitionFuncType(ctx sessionctx.Context, expr ast.ExprNode, tblInfo *
 		return nil
 	}
 
-	e, err := expression.RewriteSimpleExprWithTableInfo(ctx, tblInfo, expr)
+	e, err := expression.RewriteSimpleExprWithTableInfo(ctx, tblInfo, expr, false)
 	if err != nil {
 		return errors.Trace(err)
 	}

docs/design/2020-08-04-global-index.md

@@ -183,7 +183,7 @@ In TiDB, operators in the partitioned table will be translated to UnionAll in th
 
 ## Compatibility
 
-MySQL does not support global index, which means this feature may cause some compatibility issues. We add an option  `enable_global_index` in `config.Config`  to control it. The default value of this option is `false`, so TiDB will keep consistent with MySQL, unless the user open global index feature manually.
+MySQL does not support global index, which means this feature may cause some compatibility issues. We add an option  `enable-global-index` in `config.Config`  to control it. The default value of this option is `false`, so TiDB will keep consistent with MySQL, unless the user open global index feature manually.
 
 ## Implementation
 

executor/analyzetest/BUILD.bazel

@@ -8,7 +8,6 @@ go_test(
         "main_test.go",
     ],
     flaky = True,
-    race = "on",
     shard_count = 50,
     deps = [
         "//domain",
@@ -30,6 +29,7 @@ go_test(
         "//tablecodec",
         "//testkit",
         "//types",
+        "//util",
         "//util/codec",
         "@com_github_pingcap_errors//:errors",
         "@com_github_pingcap_failpoint//:failpoint",