diff --git a/api/src/controllers/databaseConnections.js b/api/src/controllers/databaseConnections.js
new file mode 100644
index 00000000..6f310efd
--- /dev/null
+++ b/api/src/controllers/databaseConnections.js
@@ -0,0 +1,47 @@
+const fp = require('lodash/fp');
+const connections = require('./connections');
+const socket = require('../utility/socket');
+const { fork } = require('child_process');
+const DatabaseAnalyser = require('../engines/default/DatabaseAnalyser')
+
+module.exports = {
+  /** @type {import('../types').OpenedDatabaseConnection[]} */
+  opened: [],
+
+  handle_structure(id, database, { structure }) {
+    const existing = this.opened.find(x => x.id == id && x.database == database);
+    if (!existing) return;
+    existing.structure = structure;
+    socket.emit(`database-structure-changed-${id}-${database}`);
+  },
+  handle_error(id, { error }) {
+    console.log(error);
+  },
+
+  async ensureOpened(id, database) {
+    const existing = this.opened.find(x => x.id == id && x.database == database);
+    if (existing) return existing;
+    const connection = await connections.get({ id });
+    const subprocess = fork(`${__dirname}/../proc/databaseConnectionProcess.js`);
+    const newOpened = {
+      id,
+      database,
+      subprocess,
+      structure: DatabaseAnalyser.createEmptyStructure(),
+      connection,
+    };
+    this.opened.push(newOpened);
+    // @ts-ignore
+    subprocess.on('message', ({ msgtype, ...message }) => {
+      this[`handle_${msgtype}`](id, database, message);
+    });
+    subprocess.send({ msgtype: 'connect', ...connection });
+    return newOpened;
+  },
+
+  listTables_meta: 'get',
+  async listTables({ id, database }) {
+    const opened = await this.ensureOpened(id, database);
+    return opened.structure.tables; // .map(fp.pick(['tableName', 'schemaName']));
+  },
+};
diff --git a/api/src/engines/default/DatabaseAnalyser.js b/api/src/engines/default/DatabaseAnalyser.js
index eab8d43a..cb4cad9d 100644
--- a/api/src/engines/default/DatabaseAnalyser.js
+++ b/api/src/engines/default/DatabaseAnalyser.js
@@ -1,14 +1,19 @@
-
 class DatabaseAnalyser {
   /**
    *
-   * @param {import('../default/types').EngineDriver} driver
+   * @param {import('../../types').EngineDriver} driver
    */
   constructor(pool, driver) {
     this.pool = pool;
     this.driver = driver;
+    this.result = DatabaseAnalyser.createEmptyStructure();
   }
-  runAnalysis() {}
+  async runAnalysis() {}
 }
 
+/** @returns {import('../../types').DatabaseInfo} */
+DatabaseAnalyser.createEmptyStructure = () => ({
+  tables: [],
+});
+
 module.exports = DatabaseAnalyser;
diff --git a/api/src/engines/default/types.ts b/api/src/engines/default/types.ts
deleted file mode 100644
index 55adbe99..00000000
--- a/api/src/engines/default/types.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-export interface EngineDriver {
-  connect({ server, port, user, password });
-  query(pool, sql: string): [];
-  getVersion(pool): string;
-  listDatabases(pool): [{ name: string }];
-  analyseFull(pool);
-  analyseIncremental(pool);
-}
diff --git a/api/src/engines/index.js b/api/src/engines/index.js
index 8e6ffe17..a50b1990 100644
--- a/api/src/engines/index.js
+++ b/api/src/engines/index.js
@@ -1,4 +1,8 @@
-module.exports = connection => {
+
+/** @return {import('../types').EngineDriver} */
+function getDriver(connection) {
   const { engine } = connection;
   return require(`./${engine}`);
-};
+
+}
+module.exports = getDriver;
diff --git a/api/src/engines/mssql/MsSqlAnalyser.js b/api/src/engines/mssql/MsSqlAnalyser.js
index 865cea27..bc09e01c 100644
--- a/api/src/engines/mssql/MsSqlAnalyser.js
+++ b/api/src/engines/mssql/MsSqlAnalyser.js
@@ -1,9 +1,9 @@
-
 const fs = require('fs-extra');
 const path = require('path');
 
 const DatabaseAnalayser = require('../default/DatabaseAnalyser');
 
+/** @returns {Promise<string>} */
 async function loadQuery(name) {
   return await fs.readFile(path.join(__dirname, name), 'utf-8');
 }
@@ -13,8 +13,27 @@ class MsSqlAnalyser extends DatabaseAnalayser {
     super(pool, driver);
   }
 
+  async createQuery(
+    resFileName,
+    tables = false,
+    views = false,
+    procedures = false,
+    functions = false,
+    triggers = false
+  ) {
+    let res = await loadQuery(resFileName);
+    res = res.replace('=[OBJECT_ID_CONDITION]', ' is not null');
+    return res;
+  }
   async runAnalysis() {
-    const tables = this.driver.query(this.pool, await loadQuery('tables.sql'));
+    const tables = await this.driver.query(this.pool, await this.createQuery('tables.sql'));
+    // for (const table of tables) {
+    //   table.name = {
+    //     schema: table.schemaName,
+    //     name: table.tableName,
+    //   };
+    // }
+    this.result.tables = tables;
   }
 }
 
diff --git a/api/src/engines/mssql/index.js b/api/src/engines/mssql/index.js
index 3d7260eb..38571f02 100644
--- a/api/src/engines/mssql/index.js
+++ b/api/src/engines/mssql/index.js
@@ -2,8 +2,8 @@ const mssql = require('mssql');
 const MsSqlAnalyser = require('./MsSqlAnalyser');
 
 module.exports = {
-  async connect({ server, port, user, password }) {
-    const pool = await mssql.connect({ server, port, user, password });
+  async connect({ server, port, user, password, database }) {
+    const pool = await mssql.connect({ server, port, user, password, database });
     return pool;
   },
   async query(pool, sql) {
@@ -19,9 +19,9 @@ module.exports = {
     return res;
   },
   async analyseFull(pool) {
-
-  },
-  async analyseIncremental(pool) {
-
+    const analyser = new MsSqlAnalyser(pool, this);
+    await analyser.runAnalysis();
+    return analyser.result;
   },
+  async analyseIncremental(pool) {},
 };
diff --git a/api/src/engines/mssql/tables.sql b/api/src/engines/mssql/tables.sql
index 85fe7842..b54cb573 100644
--- a/api/src/engines/mssql/tables.sql
+++ b/api/src/engines/mssql/tables.sql
@@ -1,6 +1,6 @@
 select
-	o.name as tableName, s.name as schemaName, o.objectId,
-	o.createDate, o.modifyDate 
+	o.name as tableName, s.name as schemaName, o.object_id,
+	o.create_date, o.modify_date 
 from sys.tables o
 inner join sys.schemas s on o.schema_id = s.schema_id
 where o.object_id =[OBJECT_ID_CONDITION]
diff --git a/api/src/engines/mysql/index.js b/api/src/engines/mysql/index.js
index 029c38bc..d2dd6a4f 100644
--- a/api/src/engines/mysql/index.js
+++ b/api/src/engines/mysql/index.js
@@ -1,8 +1,8 @@
 const mysql = require('mysql');
 
 module.exports = {
-  async connect({ server, port, user, password }) {
-    const connection = mysql.createConnection({ host: server, port, user, password });
+  async connect({ server, port, user, password, database }) {
+    const connection = mysql.createConnection({ host: server, port, user, password, database });
     return connection;
   },
   async query(connection, sql) {
diff --git a/api/src/engines/postgres/index.js b/api/src/engines/postgres/index.js
index 98ab8f2b..e179bce7 100644
--- a/api/src/engines/postgres/index.js
+++ b/api/src/engines/postgres/index.js
@@ -1,8 +1,8 @@
 const { Client } = require('pg');
 
 module.exports = {
-  async connect({ server, port, user, password }) {
-    const client = new Client({ host: server, port, user, password, database: 'postgres' });
+  async connect({ server, port, user, password, database }) {
+    const client = new Client({ host: server, port, user, password, database: database || 'postgres' });
     await client.connect();
     return client;
   },
diff --git a/api/src/index.js b/api/src/index.js
index fe5753ff..213dc523 100644
--- a/api/src/index.js
+++ b/api/src/index.js
@@ -7,6 +7,7 @@ const io = require('socket.io');
 const useController = require('./utility/useController');
 const connections = require('./controllers/connections');
 const serverConnections = require('./controllers/serverConnections');
+const databaseConnections = require('./controllers/databaseConnections');
 const socket = require('./utility/socket');
 
 const app = express();
@@ -23,5 +24,6 @@ app.get('/', (req, res) => {
 
 useController(app, '/connections', connections);
 useController(app, '/server-connections', serverConnections);
+useController(app, '/database-connections', databaseConnections);
 
 server.listen(3000);
diff --git a/api/src/proc/databaseConnectionProcess.js b/api/src/proc/databaseConnectionProcess.js
new file mode 100644
index 00000000..a2f93dee
--- /dev/null
+++ b/api/src/proc/databaseConnectionProcess.js
@@ -0,0 +1,37 @@
+const engines = require('../engines');
+
+let systemConnection;
+let storedConnection;
+
+async function handleFullRefresh() {
+  const driver = engines(storedConnection);
+  const structure = await driver.analyseFull(systemConnection);
+  console.log('SENDING STRUCTURE', structure);
+  process.send({ msgtype: 'structure', structure });
+}
+
+async function handleConnect(connection, database) {
+  storedConnection = connection;
+
+  const driver = engines(storedConnection);
+  systemConnection = await driver.connect({ ...storedConnection, database });
+  handleFullRefresh();
+  setInterval(handleFullRefresh, 30 * 1000);
+}
+
+const messageHandlers = {
+  connect: handleConnect,
+};
+
+async function handleMessage({ msgtype, database, ...other }) {
+  const handler = messageHandlers[msgtype];
+  await handler(other, database);
+}
+
+process.on('message', async message => {
+  try {
+    await handleMessage(message);
+  } catch (e) {
+    process.send({ msgtype: 'error', error: e.message });
+  }
+});
diff --git a/api/src/types.ts b/api/src/types.ts
new file mode 100644
index 00000000..01994593
--- /dev/null
+++ b/api/src/types.ts
@@ -0,0 +1,29 @@
+export interface EngineDriver {
+  connect({ server, port, user, password });
+  query(pool, sql: string): Promise<any[]>;
+  getVersion(pool): Promise<string>;
+  listDatabases(pool): Promise<{ name: string }[]>;
+  analyseFull(pool): Promise<void>;
+  analyseIncremental(pool): Promise<void>;
+}
+
+// export interface NameWithSchema {
+//   schema: string;  
+//   name: string;
+// }  
+
+export interface TableInfo {
+  // name: NameWithSchema;
+  tableName: string;
+  schemaName: string;
+}
+
+export interface DatabaseInfo {
+  tables: TableInfo[];
+}  
+
+export interface OpenedDatabaseConnection {
+  id: string;
+  database: string;
+  structure: DatabaseInfo;
+}
\ No newline at end of file
diff --git a/web/src/Screen.js b/web/src/Screen.js
index 79fb6bbd..b6e66c91 100644
--- a/web/src/Screen.js
+++ b/web/src/Screen.js
@@ -1,3 +1,5 @@
+// @ts-nocheck
+
 import React from 'react';
 import theme from './theme';
 import styled from 'styled-components';
@@ -9,10 +11,7 @@ import WidgetContainer from './widgets/WidgetContainer';
 const BodyDiv = styled.div`
   position: fixed;
   top: ${theme.tabsPanel.height}px;
-  left: ${props =>
-    theme.widgetMenu.iconSize +
-    // @ts-ignore
-    props.leftPanelWidth}px;
+  left: ${props => theme.widgetMenu.iconSize + props.leftPanelWidth}px;
   bottom: ${theme.statusBar.height}px;
   right: 0;
   background-color: ${theme.mainArea.background};
@@ -41,10 +40,7 @@ const TabsPanel = styled.div`
   display: flex;
   position: fixed;
   top: 0;
-  left: ${props =>
-    theme.widgetMenu.iconSize +
-    // @ts-ignore
-    props.leftPanelWidth}px;
+  left: ${props => theme.widgetMenu.iconSize + props.leftPanelWidth}px;
   height: ${theme.tabsPanel.height}px;
   right: 0;
   background-color: ${theme.tabsPanel.background};
@@ -72,18 +68,10 @@ export default function Screen({ children = undefined }) {
           <WidgetContainer />
         </LeftPanel>
       )}
-      <TabsPanel
-        // @ts-ignore
-        leftPanelWidth={leftPanelWidth}
-      >
+      <TabsPanel leftPanelWidth={leftPanelWidth}>
         <FilesTabsPanel></FilesTabsPanel>
       </TabsPanel>
-      <BodyDiv
-        // @ts-ignore
-        leftPanelWidth={leftPanelWidth}
-      >
-        {children}
-      </BodyDiv>
+      <BodyDiv leftPanelWidth={leftPanelWidth}>{children}</BodyDiv>
       <StausBar></StausBar>
     </>
   );
diff --git a/web/src/widgets/DatabaseWidget.js b/web/src/widgets/DatabaseWidget.js
index 0e30335f..3cd94f8b 100644
--- a/web/src/widgets/DatabaseWidget.js
+++ b/web/src/widgets/DatabaseWidget.js
@@ -37,21 +37,56 @@ function SubDatabaseList({ data }) {
   return <AppObjectList list={databases} makeAppObj={databaseAppObject} onObjectClick={handleDatabaseClick} />;
 }
 
-export default function DatabaseWidget() {
-  const db = useCurrentDatabase();
+function ConnectionList() {
   const modalState = useModalState();
   const connections = useFetch({
     url: 'connections/list',
     reloadTrigger: 'connection-list-changed',
   });
+  return (
+    <>
+      <ConnectionModal modalState={modalState} />
+      <button onClick={modalState.open}>Add connection</button>
+      <AppObjectList list={connections} makeAppObj={connectionAppObject} SubItems={SubDatabaseList} />
+    </>
+  );
+}
+
+function SqlObjectList({ id, database }) {
+  const tables =
+    useFetch({
+      url: `database-connections/list-tables?id=${id}&database=${database}`,
+      reloadTrigger: `database-structure-changed-${id}-${database}`,
+    }) || [];
+  return (
+    <>
+      {tables.map(({ tableName, schemaName }) => (
+        <div key={`${schemaName}.${tableName}`}>{tableName}</div>
+      ))}
+    </>
+  );
+}
+
+function SqlObjectListWrapper() {
+  const db = useCurrentDatabase();
+
+  if (!db) return <div>(Choose database)</div>;
+  const { name, connection } = db;
+
+  return <SqlObjectList id={connection._id} database={name} />;
+  // return <div>tables of {db && db.name}</div>
+  // return <div>tables of {JSON.stringify(db)}</div>
+}
+
+export default function DatabaseWidget() {
   return (
     <MainContainer>
       <InnerContainer>
-        <ConnectionModal modalState={modalState} />
-        <button onClick={modalState.open}>Add connection</button>
-        <AppObjectList list={connections} makeAppObj={connectionAppObject} SubItems={SubDatabaseList} />
+        <ConnectionList />
+      </InnerContainer>
+      <InnerContainer>
+        <SqlObjectListWrapper />
       </InnerContainer>
-      <InnerContainer>tables of {db && db.name}</InnerContainer>
     </MainContainer>
   );
 }