PgSQL支持会话管理功能 (#2845)

---------

Co-authored-by: 王飞 <fei.wang@xgo.one>

common/static/dbdiagnostic/js/db_info.js

@@ -0,0 +1,31 @@
+const pgsqlDiagnosticInfo = {
+    fieldsProcesslist: [
+        'pgsql',
+        ["All", "Not Idle"],
+        [
+            { title: '', field: 'checkbox', checkbox: true },
+            { title: 'PId', field: 'pid', sortable: true },
+            { title: '阻塞PID', field: 'block_pids', sortable: false },
+            { title: '数据库', field: 'datname', sortable: true },
+            { title: '用户', field: 'usename', sortable: true },
+            { title: '应用名称', field: 'application_name', sortable: true },
+            { title: '状态', field: 'state', sortable: true },
+            { title: '客户端地址', field: 'client_addr', sortable: true },
+            { title: '耗时(秒)', field: 'elapsed_time_seconds', sortable: true },
+            { title: '耗时', field: 'elapsed_time', sortable: true },
+            { title: '查询语句', field: 'query', sortable: true },
+            { title: '等待事件类型', field: 'wait_event_type', sortable: true },
+            { title: '等待事件', field: 'wait_event', sortable: true },
+            { title: '查询开始时间', field: 'query_start', sortable: true },
+            { title: '后端开始时间', field: 'backend_start', sortable: true },
+            { title: '父PID', field: 'leader_pid', sortable: true },
+            { title: '客户端主机名', field: 'client_hostname', sortable: true },
+            { title: '客户端端口', field: 'client_port', sortable: true },
+            { title: '事务开始时间', field: 'transaction_start_time', sortable: true },
+            { title: '状态变更时间', field: 'state_change', sortable: true },
+            { title: '后端XID', field: 'backend_xid', sortable: true },
+            { title: '后端XMIN', field: 'backend_xmin', sortable: true },
+            { title: '后端类型', field: 'backend_type', sortable: true },
+        ]
+    ]
+}

sql/engines/pgsql.py

@@ -384,3 +384,45 @@ def close(self):
         if self.conn:
             self.conn.close()
             self.conn = None
+
+    def processlist(self, command_type, **kwargs):
+        """获取连接信息"""
+        sql = """
+            select psa.pid
+                                ,concat('{',array_to_string(pg_blocking_pids(psa.pid),','),'}') block_pids
+                                ,psa.leader_pid
+                                ,psa.datname,psa.usename
+                                ,psa.application_name
+                                ,psa.state
+                                ,psa.client_addr::text client_addr
+                                ,round(GREATEST(EXTRACT(EPOCH FROM (now() - psa.query_start)),0)::numeric,4) elapsed_time_seconds
+                ,GREATEST(now() - psa.query_start, INTERVAL '0 second') AS elapsed_time
+                        ,(case when psa.leader_pid is null then psa.query end) query
+                                ,psa.wait_event_type,psa.wait_event
+                                ,psa.query_start
+                                ,psa.backend_start
+                                ,psa.client_hostname,psa.client_port
+                                ,psa.xact_start transaction_start_time
+                ,psa.state_change,psa.backend_xid,psa.backend_xmin,psa.backend_type
+                                from  pg_stat_activity psa
+                                where 1=1
+                                AND psa.pid <> pg_backend_pid()
+                                $state_not_idle$
+                                order by (case 
+                                    when psa.state='active' then 10 
+                                    when psa.state like 'idle in transaction%' then 5
+                                    when psa.state='idle' then 99 else 100 end)
+                                    ,elapsed_time_seconds desc
+                                ,(case when psa.leader_pid is not null then 1 else 0 end);
+            """
+        # escape
+        command_type = self.escape_string(command_type)
+        if not command_type:
+            command_type = "Not Idle"
+
+        if command_type == "Not Idle":
+            sql = sql.replace("$state_not_idle$", "and psa.state<>'idle'")
+
+        # 所有的模板进行替换
+        sql = sql.replace("$state_not_idle$", "")
+        return self.query("postgres", sql)

sql/engines/tests.py

@@ -856,6 +856,40 @@ def test_execute_workflow_exception(self, _conn, _cursor, _execute):
                 execute_result.rows[0].__dict__.keys(), row.__dict__.keys()
             )
 
+    @patch("psycopg2.connect")
+    def test_processlist_not_idle(self, mock_connect):
+        # 模拟数据库连接和游标
+        mock_cursor = MagicMock()
+        mock_connect.return_value.cursor.return_value = mock_cursor
+
+        # 假设 query 方法返回的结果
+        mock_cursor.fetchall.return_value = [
+            (123, "test_db", "user", "app_name", "active")
+        ]
+
+        # 创建 PgSQLEngine 实例
+        new_engine = PgSQLEngine(instance=self.ins)
+
+        # 调用 processlist 方法
+        result = new_engine.processlist(command_type="Not Idle")
+        self.assertEqual(result.rows, mock_cursor.fetchall.return_value)
+
+    @patch("psycopg2.connect")
+    def test_processlist_idle(self, mock_connect):
+        # 模拟数据库连接和游标
+        mock_cursor = MagicMock()
+        mock_connect.return_value.cursor.return_value = mock_cursor
+
+        # 假设 query 方法返回的结果
+        mock_cursor.fetchall.return_value = [
+            (123, "test_db", "user", "app_name", "idle")
+        ]
+        # 创建 PgSQLEngine 实例
+        new_engine = PgSQLEngine(instance=self.ins)
+        # 调用 processlist 方法
+        result = new_engine.processlist(command_type="Idle")
+        self.assertEqual(result.rows, mock_cursor.fetchall.return_value)
+
 
 class TestModel(TestCase):
     def setUp(self):

sql/templates/dbdiagnostic.html

@@ -28,6 +28,7 @@
                         <optgroup id="optgroup-mongo" label="MongoDB"></optgroup>
                         <optgroup id="optgroup-oracle" label="Oracle"></optgroup>
                         <optgroup id="optgroup-redis" label="Redis"></optgroup>
+                        <optgroup id="optgroup-pgsql" label="PgSQL"></optgroup>
                 </select>
             </div>
             <div id="command-div" class="form-group">
@@ -94,6 +95,7 @@ <h4 class="modal-title text-danger">确定要终止所选会话吗？</h4>
     {% load static %}
     <script src="{% static 'bootstrap-table/js/bootstrap-table-export.min.js' %}"></script>
     <script src="{% static 'bootstrap-table/js/tableExport.min.js' %}"></script>
+    <script src="{% static 'dbdiagnostic/js/db_info.js' %}"></script>
     <script>
 
         var processListColumns  = [];
@@ -453,6 +455,24 @@ <h4 class="modal-title text-danger">确定要终止所选会话吗？</h4>
         ]
 
 
+        if (typeof pgsqlDiagnosticInfo !== "undefined" && Array.isArray(pgsqlDiagnosticInfo.fieldsProcesslist)) {
+            processListTableInfos.push(pgsqlDiagnosticInfo?.fieldsProcesslist);
+        }
+        if (typeof mysqlDiagnosticInfo !== "undefined" && Array.isArray(mysqlDiagnosticInfo.fieldsProcesslist)) {
+            processListTableInfos.push(mysqlDiagnosticInfo?.fieldsProcesslist);
+        }
+        if (typeof mongoDiagnosticInfo !== "undefined" && Array.isArray(mongoDiagnosticInfo.fieldsProcesslist)) {
+            processListTableInfos.push(mongoDiagnosticInfo?.fieldsProcesslist);
+        }
+        if (typeof redisDiagnosticInfo !== "undefined" && Array.isArray(redisDiagnosticInfo.fieldsProcesslist)) {
+            processListTableInfos.push(redisDiagnosticInfo?.fieldsProcesslist);
+        }
+        if (typeof oracleDiagnosticInfo !== "undefined" && Array.isArray(oracleDiagnosticInfo.fieldsProcesslist)) {
+            processListTableInfos.push(oracleDiagnosticInfo?.fieldsProcesslist);
+        }
+
+
+
         // 问题诊断--进程列表
         function get_process_list() {
             $("#command-div").show();
@@ -1056,7 +1076,7 @@ <h4 class="modal-title text-danger">确定要终止所选会话吗？</h4>
                 //获取用户实例列表
                 $(function () {
                     // 会话管理-支持的数据库类型
-                    supportedDbType=['mysql','mongo', 'oracle','redis']
+                    supportedDbType=['mysql','mongo', 'oracle','redis','pgsql']
                     $.ajax({
                         type: "get",
                         url: "/group/user_all_instances/",