parser: add support for SHUTDOWN syntax (#580)

ast/misc.go

@@ -49,6 +49,7 @@ var (
 	_ StmtNode = &KillStmt{}
 	_ StmtNode = &CreateBindingStmt{}
 	_ StmtNode = &DropBindingStmt{}
+	_ StmtNode = &ShutdownStmt{}
 
 	_ Node = &PrivElem{}
 	_ Node = &VariableAssignment{}
@@ -1991,6 +1992,28 @@ func (n *GrantRoleStmt) SecureText() string {
 	return text
 }
 
+// ShutdownStmt is a statement to stop the TiDB server.
+// See https://dev.mysql.com/doc/refman/5.7/en/shutdown.html
+type ShutdownStmt struct {
+	stmtNode
+}
+
+// Restore implements Node interface.
+func (n *ShutdownStmt) Restore(ctx *RestoreCtx) error {
+	ctx.WriteKeyWord("SHUTDOWN")
+	return nil
+}
+
+// Accept implements Node Accept interface.
+func (n *ShutdownStmt) Accept(v Visitor) (Node, bool) {
+	newNode, skipChildren := v.Enter(n)
+	if skipChildren {
+		return v.Leave(newNode)
+	}
+	n = newNode.(*ShutdownStmt)
+	return v.Leave(n)
+}
+
 // Ident is the table identifier composed of schema name and table name.
 type Ident struct {
 	Schema model.CIStr

ast/misc_test.go

@@ -76,6 +76,7 @@ func (ts *testMiscSuite) TestMiscVisitorCover(c *C) {
 		&VariableAssignment{Value: valueExpr},
 		&KillStmt{},
 		&DropStatsStmt{Table: &TableName{}},
+		&ShutdownStmt{},
 	}
 
 	for _, v := range stmts {
@@ -130,7 +131,8 @@ load data infile '/tmp/t.csv' into table t fields terminated by 'ab' enclosed by
 // test Change Pump or drainer status sql parser
 func (ts *testMiscSuite) TestChangeStmt(c *C) {
 	sql := `change pump to node_state='paused' for node_id '127.0.0.1:8249';
-change drainer to node_state='paused' for node_id '127.0.0.1:8249';`
+change drainer to node_state='paused' for node_id '127.0.0.1:8249';
+shutdown;`
 
 	p := parser.New()
 	stmts, _, err := p.Parse(sql, "", "")

misc.go

@@ -470,6 +470,7 @@ var tokenMap = map[string]int{
 	"SHARE":                    share,
 	"SHARED":                   shared,
 	"SHOW":                     show,
+	"SHUTDOWN":                 shutdown,
 	"SIGNED":                   signed,
 	"SIMPLE":                   simple,
 	"SLAVE":                    slave,

mysql/const.go

@@ -240,6 +240,9 @@ const (
 	AlterRoutinePriv
 	EventPriv
 
+	// ShutdownPriv the privilege to shutdown a server.
+	ShutdownPriv
+
 	// AllPriv is the privilege for all actions.
 	AllPriv
 )
@@ -311,6 +314,7 @@ var Priv2UserCol = map[PrivilegeType]string{
 	CreateRoutinePriv:  "Create_routine_priv",
 	AlterRoutinePriv:   "Alter_routine_priv",
 	EventPriv:          "Event_priv",
+	ShutdownPriv:       "Shutdown_priv",
 }
 
 // Col2PrivType is the privilege tables column name to privilege type.
@@ -340,6 +344,7 @@ var Col2PrivType = map[string]PrivilegeType{
 	"Create_routine_priv":   CreateRoutinePriv,
 	"Alter_routine_priv":    AlterRoutinePriv,
 	"Event_priv":            EventPriv,
+	"Shutdown_priv":         ShutdownPriv,
 }
 
 // Command2Str is the command information to command name.
@@ -405,6 +410,7 @@ var Priv2Str = map[PrivilegeType]string{
 	CreateRoutinePriv:  "CREATE ROUTINE",
 	AlterRoutinePriv:   "ALTER ROUTINE",
 	EventPriv:          "EVENT",
+	ShutdownPriv:       "SHUTDOWN",
 }
 
 // Priv2SetStr is the map for privilege to string.
@@ -423,6 +429,7 @@ var Priv2SetStr = map[PrivilegeType]string{
 	ShowViewPriv:   "Show View",
 	CreateRolePriv: "Create Role",
 	DropRolePriv:   "Drop Role",
+	ShutdownPriv:   "Shutdown Role",
 }
 
 // SetStr2Priv is the map for privilege set string to privilege type.
@@ -442,7 +449,7 @@ var SetStr2Priv = map[string]PrivilegeType{
 }
 
 // AllGlobalPrivs is all the privileges in global scope.
-var AllGlobalPrivs = []PrivilegeType{SelectPriv, InsertPriv, UpdatePriv, DeletePriv, CreatePriv, DropPriv, ProcessPriv, ReferencesPriv, AlterPriv, ShowDBPriv, SuperPriv, ExecutePriv, IndexPriv, CreateUserPriv, TriggerPriv, CreateViewPriv, ShowViewPriv, CreateRolePriv, DropRolePriv, CreateTMPTablePriv, LockTablesPriv, CreateRoutinePriv, AlterRoutinePriv, EventPriv}
+var AllGlobalPrivs = []PrivilegeType{SelectPriv, InsertPriv, UpdatePriv, DeletePriv, CreatePriv, DropPriv, ProcessPriv, ReferencesPriv, AlterPriv, ShowDBPriv, SuperPriv, ExecutePriv, IndexPriv, CreateUserPriv, TriggerPriv, CreateViewPriv, ShowViewPriv, CreateRolePriv, DropRolePriv, CreateTMPTablePriv, LockTablesPriv, CreateRoutinePriv, AlterRoutinePriv, EventPriv, ShutdownPriv}
 
 // AllDBPrivs is all the privileges in database scope.
 var AllDBPrivs = []PrivilegeType{SelectPriv, InsertPriv, UpdatePriv, DeletePriv, CreatePriv, DropPriv, AlterPriv, ExecutePriv, IndexPriv, CreateViewPriv, ShowViewPriv}