describe the user

src/graph/executor/CMakeLists.txt

@@ -51,6 +51,7 @@ nebula_add_library(
     admin/ChangePasswordExecutor.cpp
     admin/ListUserRolesExecutor.cpp
     admin/ListUsersExecutor.cpp
+    admin/DescribeUserExecutor.cpp
     admin/ListRolesExecutor.cpp
     admin/SubmitJobExecutor.cpp
     admin/ShowHostsExecutor.cpp

src/graph/executor/Executor.cpp

@@ -20,6 +20,7 @@
 #include "graph/executor/admin/CharsetExecutor.h"
 #include "graph/executor/admin/ConfigExecutor.h"
 #include "graph/executor/admin/CreateUserExecutor.h"
+#include "graph/executor/admin/DescribeUserExecutor.h"
 #include "graph/executor/admin/DownloadExecutor.h"
 #include "graph/executor/admin/DropUserExecutor.h"
 #include "graph/executor/admin/GrantRoleExecutor.h"
@@ -386,6 +387,9 @@ Executor *Executor::makeExecutor(QueryContext *qctx, const PlanNode *node) {
     case PlanNode::Kind::kListRoles: {
       return pool->add(new ListRolesExecutor(node, qctx));
     }
+    case PlanNode::Kind::kDescribeUser: {
+      return pool->add(new DescribeUserExecutor(node, qctx));
+    }
     case PlanNode::Kind::kShowConfigs: {
       return pool->add(new ShowConfigsExecutor(node, qctx));
     }

src/graph/executor/admin/DescribeUserExecutor.cpp

@@ -0,0 +1,57 @@
+/* Copyright (c) 2020 vesoft inc. All rights reserved.
+ *
+ * This source code is licensed under Apache 2.0 License.
+ */
+
+#include "graph/executor/admin/DescribeUserExecutor.h"
+
+#include <thrift/lib/cpp/util/EnumUtils.h>
+
+#include "graph/context/QueryContext.h"
+#include "graph/planner/plan/Admin.h"
+#include "interface/gen-cpp2/meta_types.h"
+
+namespace nebula {
+namespace graph {
+
+folly::Future<Status> DescribeUserExecutor::execute() {
+  SCOPED_TIMER(&execTime_);
+  return describeUser();
+}
+
+folly::Future<Status> DescribeUserExecutor::describeUser() {
+  auto* duNode = asNode<DescribeUser>(node());
+  return qctx()
+      ->getMetaClient()
+      ->getUserRoles(*duNode->username())
+      .via(runner())
+      .thenValue([this](StatusOr<std::vector<meta::cpp2::RoleItem>>&& resp) {
+        SCOPED_TIMER(&execTime_);
+        if (!resp.ok()) {
+          return std::move(resp).status();
+        }
+
+        DataSet v({"role", "space"});
+        auto roleItemList = std::move(resp).value();
+        for (auto& item : roleItemList) {
+          if (item.get_space_id() == 0) {
+            v.emplace_back(
+                nebula::Row({apache::thrift::util::enumNameSafe(item.get_role_type()), ""}));
+          } else {
+            auto spaceNameResult = qctx_->schemaMng()->toGraphSpaceName(item.get_space_id());
+            if (spaceNameResult.ok()) {
+              v.emplace_back(nebula::Row({apache::thrift::util::enumNameSafe(item.get_role_type()),
+                                          spaceNameResult.value()}));
+            } else {
+              LOG(ERROR) << " Space name of " << item.get_space_id() << " no found";
+              return Status::Error("Space not found");
+            }
+          }
+        }
+        return finish(
+            ResultBuilder().value(Value(std::move(v))).iter(Iterator::Kind::kSequential).build());
+      });
+}
+
+}  // namespace graph
+}  // namespace nebula

src/graph/executor/admin/DescribeUserExecutor.h

@@ -0,0 +1,28 @@
+/* Copyright (c) 2020 vesoft inc. All rights reserved.
+ *
+ * This source code is licensed under Apache 2.0 License.
+ */
+
+#ifndef GRAPH_EXECUTOR_ADMIN_DESCRIBEUSEREXECUTOR_H_
+#define GRAPH_EXECUTOR_ADMIN_DESCRIBEUSEREXECUTOR_H_
+
+#include "graph/executor/Executor.h"
+
+namespace nebula {
+namespace graph {
+
+class DescribeUserExecutor final : public Executor {
+ public:
+  DescribeUserExecutor(const PlanNode *node, QueryContext *qctx)
+      : Executor("DescribeUsersExecutor", node, qctx) {}
+
+  folly::Future<Status> execute() override;
+
+ private:
+  folly::Future<Status> describeUser();
+};
+
+}  // namespace graph
+}  // namespace nebula
+
+#endif  // GRAPH_EXECUTOR_ADMIN_LISTUSERSEXECUTOR_H_

src/graph/planner/plan/Admin.cpp

@@ -136,6 +136,12 @@ std::unique_ptr<PlanNodeDescription> ChangePassword::explain() const {
   return desc;
 }
 
+std::unique_ptr<PlanNodeDescription> DescribeUser::explain() const {
+  auto desc = SingleDependencyNode::explain();
+  addDescription("username", *username_, desc.get());
+  return desc;
+}
+
 std::unique_ptr<PlanNodeDescription> ListUserRoles::explain() const {
   auto desc = SingleDependencyNode::explain();
   addDescription("username", *username_, desc.get());

src/graph/planner/plan/Admin.h

@@ -653,6 +653,23 @@ class ListUsers final : public SingleDependencyNode {
       : SingleDependencyNode(qctx, Kind::kListUsers, dep) {}
 };
 
+class DescribeUser final : public SingleDependencyNode {
+ public:
+  static DescribeUser* make(QueryContext* qctx, PlanNode* dep, const std::string* username) {
+    return qctx->objPool()->add(new DescribeUser(qctx, dep, username));
+  }
+
+  std::unique_ptr<PlanNodeDescription> explain() const override;
+
+  const std::string* username() const { return username_; }
+
+ private:
+  explicit DescribeUser(QueryContext* qctx, PlanNode* dep, const std::string* username)
+      : SingleDependencyNode(qctx, Kind::kDescribeUser, dep), username_(username) {}
+
+  const std::string* username_;
+};
+
 class ListRoles final : public SingleDependencyNode {
  public:
   static ListRoles* make(QueryContext* qctx, PlanNode* dep, GraphSpaceID space) {

src/graph/planner/plan/PlanNode.cpp

@@ -148,6 +148,8 @@ const char* PlanNode::toString(PlanNode::Kind kind) {
       return "ListUserRoles";
     case Kind::kListUsers:
       return "ListUsers";
+    case Kind::kDescribeUser:
+      return "DescribeUser";
     case Kind::kListRoles:
       return "ListRoles";
     case Kind::kShowCreateSpace:

src/graph/planner/plan/PlanNode.h

@@ -121,6 +121,7 @@ class PlanNode {
     kListUserRoles,
     kListUsers,
     kListRoles,
+    kDescribeUser,
 
     // Snapshot
     kCreateSnapshot,

src/graph/service/PermissionCheck.cpp

@@ -183,6 +183,7 @@ Status PermissionCheck::permissionCheck(ClientSession *session,
     case Sentence::Kind::kShowRoles: {
       return PermissionManager::canReadSpace(session, targetSpace);
     }
+    case Sentence::Kind::kDescribeUser:
     case Sentence::Kind::kShowUsers:
     case Sentence::Kind::kShowSnapshots:
     case Sentence::Kind::kShowTSClients:

src/graph/service/PermissionManager.cpp

@@ -113,6 +113,26 @@ Status PermissionManager::canWriteUser(ClientSession *session) {
   }
 }
 
+// static
+Status PermissionManager::canReadUser(ClientSession *session, const std::string &targetUser) {
+  if (!FLAGS_enable_authorize) {
+    return Status::OK();
+  }
+  // Cloud auth user cannot create user
+  if (FLAGS_auth_type == "cloud") {
+    return Status::PermissionError("Cloud authenticate user can't write user.");
+  }
+  if (session->isGod()) {
+    return Status::OK();
+  }
+
+  if (session->user() == targetUser) {
+    return Status::OK();
+  }
+
+  return Status::PermissionError("No permission to read user `%s'.", targetUser.c_str());
+}
+
 Status PermissionManager::canWriteRole(ClientSession *session,
                                        meta::cpp2::RoleType targetRole,
                                        GraphSpaceID spaceId,

src/graph/service/PermissionManager.h

@@ -24,6 +24,7 @@ class PermissionManager final {
   static Status canWriteSpace(ClientSession *session);
   static Status canWriteSchema(ClientSession *session, ValidateContext *vctx);
   static Status canWriteUser(ClientSession *session);
+  static Status canReadUser(ClientSession *session, const std::string &targetUser);
   static Status canWriteRole(ClientSession *session,
                              meta::cpp2::RoleType targetRole,
                              GraphSpaceID spaceId,

src/graph/validator/ACLValidator.cpp

@@ -131,6 +131,31 @@ Status RevokeRoleValidator::toPlan() {
                                        sentence->getAclItemClause()->getRoleType());
 }
 
+// describe user
+Status DescribeUserValidator::validateImpl() {
+  auto sentence = static_cast<DescribeUserSentence *>(sentence_);
+  if (sentence->account()->size() > kUsernameMaxLength) {
+    return Status::SemanticError("Username exceed maximum length %ld characters.",
+                                 kUsernameMaxLength);
+  }
+  if (!inputs_.empty()) {
+    return Status::SemanticError("Show queries sentence do not support input");
+  }
+  outputs_.emplace_back("role", Value::Type::STRING);
+  outputs_.emplace_back("space", Value::Type::STRING);
+  return Status::OK();
+}
+
+Status DescribeUserValidator::checkPermission() {
+  auto sentence = static_cast<DescribeUserSentence *>(sentence_);
+  return PermissionManager::canReadUser(qctx_->rctx()->session(), *sentence->account());
+}
+
+Status DescribeUserValidator::toPlan() {
+  auto sentence = static_cast<DescribeUserSentence *>(sentence_);
+  return genSingleNodePlan<DescribeUser>(sentence->account());
+}
+
 // show roles in space
 Status ShowRolesInSpaceValidator::validateImpl() {
   auto sentence = static_cast<ShowRolesSentence *>(sentence_);

src/graph/validator/ACLValidator.h

@@ -97,6 +97,20 @@ class RevokeRoleValidator final : public Validator {
   Status toPlan() override;
 };
 
+class DescribeUserValidator final : public Validator {
+ public:
+  DescribeUserValidator(Sentence* sentence, QueryContext* context) : Validator(sentence, context) {
+    setNoSpaceRequired();
+  }
+
+ private:
+  Status validateImpl() override;
+
+  Status checkPermission() override;
+
+  Status toPlan() override;
+};
+
 class ShowRolesInSpaceValidator final : public Validator {
  public:
   ShowRolesInSpaceValidator(Sentence* sentence, QueryContext* context)

src/graph/validator/Validator.cpp

@@ -131,6 +131,8 @@ std::unique_ptr<Validator> Validator::makeValidator(Sentence* sentence, QueryCon
       return std::make_unique<RevokeRoleValidator>(sentence, context);
     case Sentence::Kind::kShowRoles:
       return std::make_unique<ShowRolesInSpaceValidator>(sentence, context);
+    case Sentence::Kind::kDescribeUser:
+      return std::make_unique<DescribeUserValidator>(sentence, context);
     case Sentence::Kind::kAdminJob:
     case Sentence::Kind::kAdminShowJobs:
       return std::make_unique<AdminJobValidator>(sentence, context);

src/parser/AdminSentences.cpp

@@ -27,6 +27,10 @@ std::string ShowPartsSentence::toString() const { return std::string("SHOW PARTS
 
 std::string ShowUsersSentence::toString() const { return std::string("SHOW USERS"); }
 
+std::string DescribeUserSentence::toString() const {
+  return folly::stringPrintf("DESCRIBE USER %s", account_.get()->c_str());
+}
+
 std::string ShowRolesSentence::toString() const {
   return folly::stringPrintf("SHOW ROLES IN %s", name_.get()->c_str());
 }

src/parser/AdminSentences.h

@@ -80,6 +80,21 @@ class ShowUsersSentence : public Sentence {
   std::string toString() const override;
 };
 
+class DescribeUserSentence : public Sentence {
+ public:
+  explicit DescribeUserSentence(std::string* account) {
+    account_.reset(account);
+    kind_ = Kind::kDescribeUser;
+  }
+
+  std::string toString() const override;
+
+  const std::string* account() const { return account_.get(); }
+
+ private:
+  std::unique_ptr<std::string> account_;
+};
+
 class ShowRolesSentence : public Sentence {
  public:
   explicit ShowRolesSentence(std::string* name) {

src/parser/Sentence.h

@@ -79,6 +79,7 @@ class Sentence {
     kShowStats,
     kShowTSClients,
     kShowFTIndexes,
+    kDescribeUser,
     kDeleteVertices,
     kDeleteTags,
     kDeleteEdges,

src/parser/parser.yy

@@ -362,7 +362,7 @@ static constexpr size_t kCommentLengthLimit = 256;
 %type <sentence> add_listener_sentence remove_listener_sentence list_listener_sentence
 
 %type <sentence> admin_job_sentence
-%type <sentence> create_user_sentence alter_user_sentence drop_user_sentence change_password_sentence
+%type <sentence> create_user_sentence alter_user_sentence drop_user_sentence change_password_sentence describe_user_sentence
 %type <sentence> show_queries_sentence kill_query_sentence
 %type <sentence> show_sentence
 
@@ -2433,6 +2433,15 @@ column_property
     }
     ;
 
+describe_user_sentence
+    : KW_DESCRIBE KW_USER name_label {
+        $$ = new DescribeUserSentence($3);
+    }
+    | KW_DESC KW_USER name_label {
+        $$ = new DescribeUserSentence($3);
+    }
+    ;
+
 describe_tag_sentence
     : KW_DESCRIBE KW_TAG name_label {
         $$ = new DescribeTagSentence($3);
@@ -2714,6 +2723,7 @@ traverse_sentence
     | delete_edge_sentence { $$ = $1; }
     | show_queries_sentence { $$ = $1; }
     | kill_query_sentence { $$ = $1; }
+    | describe_user_sentence { $$ = $1; }
     ;
 
 piped_sentence

tests/tck/conftest.py

@@ -213,6 +213,12 @@ def executing_query(query, graph_spaces, session, request):
     ngql = combine_query(query)
     exec_query(request, ngql, session, graph_spaces)
 
+@when(parse("executing query with user {username} with password {password}:\n{query}"))
+def executing_query(username, password, conn_pool_to_first_graph_service, query, graph_spaces, request):
+    sess = conn_pool_to_first_graph_service.get_session(username, password)
+    ngql = combine_query(query)
+    exec_query(request, ngql, sess, graph_spaces)
+    sess.release()
 
 @when(parse("profiling query:\n{query}"))
 def profiling_query(query, graph_spaces, session, request):