sql: process list now shows client address

Previously it was showing server address but should be the client:

https://dev.mysql.com/doc/refman/8.0/en/processlist-table.html

Also merged client user and address as Client struct in session.

Signed-off-by: Javi Fontan <jfontan@gmail.com>

auth/common_test.go

@@ -153,7 +153,7 @@ func testAuthorization(
 		t.Run(fmt.Sprintf("%s-%s", c.user, c.query), func(t *testing.T) {
 			req := require.New(t)
 
-			session := sql.NewSession("localhost", c.user, uint32(i))
+			session := sql.NewSession("localhost", "client", c.user, uint32(i))
 			ctx := sql.NewContext(context.TODO(),
 				sql.WithSession(session),
 				sql.WithPid(uint64(i)))

engine_test.go

@@ -1674,7 +1674,7 @@ func insertRows(t *testing.T, table sql.Inserter, rows ...sql.Row) {
 var pid uint64
 
 func newCtx() *sql.Context {
-	session := sql.NewSession("address", "user", 1)
+	session := sql.NewSession("address", "client", "user", 1)
 	return sql.NewContext(
 		context.Background(),
 		sql.WithPid(atomic.AddUint64(&pid, 1)),

server/context.go

@@ -18,7 +18,8 @@ type DoneFunc func()
 
 // DefaultSessionBuilder is a SessionBuilder that returns a base session.
 func DefaultSessionBuilder(c *mysql.Conn, addr string) sql.Session {
-	return sql.NewSession(addr, c.User, c.ConnectionID)
+	client := c.RemoteAddr().String()
+	return sql.NewSession(addr, client, c.User, c.ConnectionID)
 }
 
 // SessionManager is in charge of creating new sessions for the given

server/handler_test.go

@@ -36,9 +36,16 @@ func setupMemDB(require *require.Assertions) *sqle.Engine {
 }
 
 func TestHandlerOutput(t *testing.T) {
+	// This session builder is used as dummy mysql Conn is not complete and
+	// causes panic when accessing remote address.
+	testSessionBuilder := func(c *mysql.Conn, addr string) sql.Session {
+		client := "127.0.0.1:34567"
+		return sql.NewSession(addr, client, c.User, c.ConnectionID)
+	}
+
 	e := setupMemDB(require.New(t))
 	dummyConn := &mysql.Conn{ConnectionID: 1}
-	handler := NewHandler(e, NewSessionManager(DefaultSessionBuilder, opentracing.NoopTracer{}, "foo"))
+	handler := NewHandler(e, NewSessionManager(testSessionBuilder, opentracing.NoopTracer{}, "foo"))
 	handler.NewConnection(dummyConn)
 
 	type exptectedValues struct {

sql/analyzer/check_auth.go

@@ -21,7 +21,7 @@ func CheckAuthorization(au auth.Auth) RuleFunc {
 			perm = auth.ReadPerm
 		}
 
-		err := au.Allowed(ctx.User(), perm)
+		err := au.Allowed(ctx.Client().User, perm)
 		if err != nil {
 			return nil, err
 		}

sql/expression/function/connection_id_test.go

@@ -11,7 +11,7 @@ import (
 func TestConnectionID(t *testing.T) {
 	require := require.New(t)
 
-	session := sql.NewSession("", "", 2)
+	session := sql.NewSession("", "", "", 2)
 	ctx := sql.NewContext(context.Background(), sql.WithSession(session))
 
 	f := NewConnectionID()

sql/plan/processlist.go

@@ -94,7 +94,7 @@ func (p *ShowProcessList) RowIter(ctx *sql.Context) (sql.RowIter, error) {
 			time:    int64(proc.Seconds()),
 			state:   strings.Join(status, ", "),
 			command: proc.Type.String(),
-			host:    ctx.Session.Address(),
+			host:    ctx.Session.Client().Address,
 			info:    proc.Query,
 			db:      p.Database,
 		}.toRow()

sql/plan/processlist_test.go

@@ -11,9 +11,11 @@ import (
 func TestShowProcessList(t *testing.T) {
 	require := require.New(t)
 
+	addr := "127.0.0.1:34567"
+
 	n := NewShowProcessList()
 	p := sql.NewProcessList()
-	sess := sql.NewSession("0.0.0.0:1234", "foo", 1)
+	sess := sql.NewSession("0.0.0.0:3306", addr, "foo", 1)
 	ctx := sql.NewContext(context.Background(), sql.WithPid(1), sql.WithSession(sess))
 
 	ctx, err := p.AddProcess(ctx, sql.QueryProcess, "SELECT foo")
@@ -42,8 +44,8 @@ func TestShowProcessList(t *testing.T) {
 	require.NoError(err)
 
 	expected := []sql.Row{
-		{int64(1), "foo", "0.0.0.0:1234", "foo", "query", int64(0), "a(4/5), b(2/6)", "SELECT foo"},
-		{int64(2), "foo", "0.0.0.0:1234", "foo", "create_index", int64(0), "foo(1/2)", "SELECT bar"},
+		{int64(1), "foo", addr, "foo", "query", int64(0), "a(4/5), b(2/6)", "SELECT foo"},
+		{int64(2), "foo", addr, "foo", "create_index", int64(0), "foo(1/2)", "SELECT bar"},
 	}
 
 	require.ElementsMatch(expected, rows)

sql/processlist.go

@@ -108,7 +108,7 @@ func (pl *ProcessList) AddProcess(
 		Type:       typ,
 		Query:      query,
 		Progress:   make(map[string]Progress),
-		User:       ctx.Session.User(),
+		User:       ctx.Session.Client().User,
 		StartedAt:  time.Now(),
 		Kill:       cancel,
 	}
@@ -136,7 +136,7 @@ func (pl *ProcessList) UpdateProgress(pid uint64, name string, delta int64) {
 	p.Progress[name] = progress
 }
 
-// AddProgressItem adds a new item to track progress from to the proces with
+// AddProgressItem adds a new item to track progress from to the process with
 // the given pid. If the pid does not exist, it will do nothing.
 func (pl *ProcessList) AddProgressItem(pid uint64, name string, total int64) {
 	pl.mu.Lock()

sql/processlist_test.go

@@ -12,7 +12,7 @@ func TestProcessList(t *testing.T) {
 	require := require.New(t)
 
 	p := NewProcessList()
-	sess := NewSession("0.0.0.0:1234", "foo", 1)
+	sess := NewSession("0.0.0.0:3306", "127.0.0.1:34567", "foo", 1)
 	ctx := NewContext(context.Background(), WithPid(1), WithSession(sess))
 	ctx, err := p.AddProcess(ctx, QueryProcess, "SELECT foo")
 	require.NoError(err)

sql/session.go

@@ -19,12 +19,20 @@ const (
 	QueryKey key = iota
 )
 
+// Client holds session user information.
+type Client struct {
+	// User of the session.
+	User string
+	// Address of the client.
+	Address string
+}
+
 // Session holds the session data.
 type Session interface {
 	// Address of the server.
 	Address() string
 	// User of the session.
-	User() string
+	Client() Client
 	// Set session configuration.
 	Set(key string, typ Type, value interface{})
 	// Get session configuration.
@@ -47,18 +55,18 @@ type Session interface {
 type BaseSession struct {
 	id       uint32
 	addr     string
-	user     string
+	client   Client
 	mu       sync.RWMutex
 	config   map[string]TypedValue
 	warnings []*Warning
 }
 
-// User returns the current user of the session.
-func (s *BaseSession) User() string { return s.user }
-
 // Address returns the server address.
 func (s *BaseSession) Address() string { return s.addr }
 
+// User returns session's client information.
+func (s *BaseSession) Client() Client { return s.client }
+
 // Set implements the Session interface.
 func (s *BaseSession) Set(key string, typ Type, value interface{}) {
 	s.mu.Lock()
@@ -171,11 +179,14 @@ func HasDefaultValue(s Session, key string) (bool, interface{}) {
 }
 
 // NewSession creates a new session with data.
-func NewSession(address string, user string, id uint32) Session {
+func NewSession(server, client, user string, id uint32) Session {
 	return &BaseSession{
-		id:     id,
-		addr:   address,
-		user:   user,
+		id:   id,
+		addr: server,
+		client: Client{
+			Address: client,
+			User:    user,
+		},
 		config: DefaultSessionConfig(),
 	}
 }

sql/session_test.go

@@ -11,7 +11,7 @@ import (
 func TestSessionConfig(t *testing.T) {
 	require := require.New(t)
 
-	sess := NewSession("foo", "bar", 1)
+	sess := NewSession("foo", "baz", "bar", 1)
 	typ, v := sess.Get("foo")
 	require.Equal(Null, typ)
 	require.Equal(nil, v)
@@ -37,7 +37,7 @@ func TestSessionConfig(t *testing.T) {
 
 func TestHasDefaultValue(t *testing.T) {
 	require := require.New(t)
-	sess := NewSession("foo", "bar", 1)
+	sess := NewSession("foo", "baz", "bar", 1)
 
 	for key := range DefaultSessionConfig() {
 		require.True(HasDefaultValue(sess, key))