diff --git a/superset/assets/javascripts/SqlLab/components/DatabaseSelect.jsx b/superset/assets/javascripts/SqlLab/components/DatabaseSelect.jsx
deleted file mode 100644
index 49cbba0159b8..000000000000
--- a/superset/assets/javascripts/SqlLab/components/DatabaseSelect.jsx
+++ /dev/null
@@ -1,61 +0,0 @@
-const $ = window.$ = require('jquery');
-import React from 'react';
-import Select from 'react-select';
-
-const propTypes = {
-  onChange: React.PropTypes.func,
-  actions: React.PropTypes.object,
-  databaseId: React.PropTypes.number,
-  valueRenderer: React.PropTypes.func,
-};
-
-class DatabaseSelect extends React.PureComponent {
-  constructor(props) {
-    super(props);
-    this.state = {
-      databaseLoading: false,
-      databaseOptions: [],
-    };
-  }
-  componentDidMount() {
-    this.fetchDatabaseOptions();
-  }
-  changeDb(db) {
-    this.props.onChange(db);
-  }
-  fetchDatabaseOptions() {
-    this.setState({ databaseLoading: true });
-    const url = '/databaseasync/api/read?_flt_0_expose_in_sqllab=1';
-    $.get(url, (data) => {
-      const options = data.result.map((db) => ({ value: db.id, label: db.database_name }));
-      this.setState({ databaseOptions: options, databaseLoading: false });
-      this.props.actions.setDatabases(data.result);
-      if (data.result.length === 0) {
-        this.props.actions.addAlert({
-          bsStyle: 'danger',
-          msg: "It seems you don't have access to any database",
-        });
-      }
-    });
-  }
-  render() {
-    return (
-      <div>
-        <Select
-          name="select-db"
-          placeholder={`Select a database (${this.state.databaseOptions.length})`}
-          options={this.state.databaseOptions}
-          value={this.props.databaseId}
-          isLoading={this.state.databaseLoading}
-          autosize={false}
-          onChange={this.changeDb.bind(this)}
-          valueRenderer={this.props.valueRenderer}
-        />
-      </div>
-    );
-  }
-}
-
-DatabaseSelect.propTypes = propTypes;
-
-export default DatabaseSelect;
diff --git a/superset/assets/javascripts/SqlLab/components/QuerySearch.jsx b/superset/assets/javascripts/SqlLab/components/QuerySearch.jsx
index de33febf8d83..8acd6c360737 100644
--- a/superset/assets/javascripts/SqlLab/components/QuerySearch.jsx
+++ b/superset/assets/javascripts/SqlLab/components/QuerySearch.jsx
@@ -3,10 +3,10 @@ import React from 'react';
 import { Button } from 'react-bootstrap';
 import Select from 'react-select';
 import QueryTable from './QueryTable';
-import DatabaseSelect from './DatabaseSelect';
 import { now, epochTimeXHoursAgo,
   epochTimeXDaysAgo, epochTimeXYearsAgo } from '../../modules/dates';
 import { STATUS_OPTIONS, TIME_OPTIONS } from '../constants';
+import AsyncSelect from '../../components/AsyncSelect';
 
 const propTypes = {
   actions: React.PropTypes.object.isRequired,
@@ -28,9 +28,6 @@ class QuerySearch extends React.PureComponent {
       queriesLoading: true,
     };
   }
-  componentWillMount() {
-    this.fetchUsers();
-  }
   componentDidMount() {
     this.refreshQueries();
   }
@@ -89,18 +86,23 @@ class QuerySearch extends React.PureComponent {
   changeSearch(event) {
     this.setState({ searchText: event.target.value });
   }
-  fetchUsers() {
-    this.setState({ userLoading: true });
-    const url = '/users/api/read';
-    $.getJSON(url, (data, status) => {
-      if (status === 'success') {
-        const options = [];
-        for (let i = 0; i < data.pks.length; i++) {
-          options.push({ value: data.pks[i], label: data.result[i].username });
-        }
-        this.setState({ userOptions: options, userLoading: false });
-      }
-    });
+  userMutator(data) {
+    const options = [];
+    for (let i = 0; i < data.pks.length; i++) {
+      options.push({ value: data.pks[i], label: data.result[i].username });
+    }
+    return options;
+  }
+  dbMutator(data) {
+    const options = data.result.map((db) => ({ value: db.id, label: db.database_name }));
+    this.props.actions.setDatabases(data.result);
+    if (data.result.length === 0) {
+      this.props.actions.addAlert({
+        bsStyle: 'danger',
+        msg: "It seems you don't have access to any database",
+      });
+    }
+    return options;
   }
   refreshQueries() {
     this.setState({ queriesLoading: true });
@@ -125,21 +127,19 @@ class QuerySearch extends React.PureComponent {
       <div>
         <div id="search-header" className="row space-1">
           <div className="col-sm-2">
-            <Select
-              name="select-user"
-              placeholder="[User]"
-              options={this.state.userOptions}
+            <AsyncSelect
+              dataEndpoint="/users/api/read"
+              mutator={this.userMutator}
               value={this.state.userId}
-              isLoading={this.state.userLoading}
-              autosize={false}
               onChange={this.changeUser.bind(this)}
             />
           </div>
           <div className="col-sm-2">
-            <DatabaseSelect
+            <AsyncSelect
               onChange={this.onChange.bind(this)}
-              databaseId={this.state.databaseId}
-              actions={this.props.actions}
+              dataEndpoint="/databaseasync/api/read?_flt_0_expose_in_sqllab=1"
+              value={this.state.databaseId}
+              mutator={this.dbMutator.bind(this)}
             />
           </div>
           <div className="col-sm-4">
diff --git a/superset/assets/javascripts/SqlLab/components/SqlEditorLeftBar.jsx b/superset/assets/javascripts/SqlLab/components/SqlEditorLeftBar.jsx
index 5c5eacf78291..21d5f2bfceec 100644
--- a/superset/assets/javascripts/SqlLab/components/SqlEditorLeftBar.jsx
+++ b/superset/assets/javascripts/SqlLab/components/SqlEditorLeftBar.jsx
@@ -3,7 +3,7 @@ import React from 'react';
 import Select from 'react-select';
 import { Label, Button } from 'react-bootstrap';
 import TableElement from './TableElement';
-import DatabaseSelect from './DatabaseSelect';
+import AsyncSelect from '../../components/AsyncSelect';
 
 const propTypes = {
   queryEditor: React.PropTypes.object.isRequired,
@@ -44,6 +44,17 @@ class SqlEditorLeftBar extends React.PureComponent {
       this.fetchSchemas(val);
     }
   }
+  dbMutator(data) {
+    const options = data.result.map((db) => ({ value: db.id, label: db.database_name }));
+    this.props.actions.setDatabases(data.result);
+    if (data.result.length === 0) {
+      this.props.actions.addAlert({
+        bsStyle: 'danger',
+        msg: "It seems you don't have access to any database",
+      });
+    }
+    return options;
+  }
   resetState() {
     this.props.actions.resetState();
   }
@@ -103,15 +114,17 @@ class SqlEditorLeftBar extends React.PureComponent {
         <div className="clearfix sql-toolbar scrollbar-content">
           {networkAlert}
           <div>
-            <DatabaseSelect
+            <AsyncSelect
+              dataEndpoint="/databaseasync/api/read?_flt_0_expose_in_sqllab=1"
               onChange={this.onChange.bind(this)}
-              databaseId={this.props.queryEditor.dbId}
-              actions={this.props.actions}
+              value={this.props.queryEditor.dbId}
               valueRenderer={(o) => (
                 <div>
                   <span className="text-muted">Database:</span> {o.label}
                 </div>
               )}
+              mutator={this.dbMutator.bind(this)}
+              placeholder="Select a database"
             />
           </div>
           <div className="m-t-5">
diff --git a/superset/assets/javascripts/components/AsyncSelect.jsx b/superset/assets/javascripts/components/AsyncSelect.jsx
new file mode 100644
index 000000000000..9172414b27c1
--- /dev/null
+++ b/superset/assets/javascripts/components/AsyncSelect.jsx
@@ -0,0 +1,60 @@
+const $ = window.$ = require('jquery');
+import React from 'react';
+import Select from 'react-select';
+
+const propTypes = {
+  dataEndpoint: React.PropTypes.string.isRequired,
+  onChange: React.PropTypes.func.isRequired,
+  mutator: React.PropTypes.func.isRequired,
+  value: React.PropTypes.number,
+  valueRenderer: React.PropTypes.func,
+  placeholder: React.PropTypes.string,
+};
+
+const defaultProps = {
+  placeholder: 'Select ...',
+  value: null,
+  valueRenderer: () => {},
+};
+
+class AsyncSelect extends React.PureComponent {
+  constructor(props) {
+    super(props);
+    this.state = {
+      isLoading: false,
+      options: [],
+    };
+  }
+  componentDidMount() {
+    this.fetchOptions();
+  }
+  fetchOptions() {
+    this.setState({ isLoading: true });
+    const mutator = this.props.mutator;
+    $.get(this.props.dataEndpoint, (data) => {
+      this.setState({ options: mutator ? mutator(data) : data, isLoading: false });
+    });
+  }
+  onChange(opt) {
+    this.props.onChange(opt);
+  }
+  render() {
+    return (
+      <div>
+        <Select
+          placeholder={this.props.placeholder}
+          options={this.state.options}
+          value={this.props.value}
+          isLoading={this.state.isLoading}
+          onChange={this.onChange.bind(this)}
+          valueRenderer={this.props.valueRenderer}
+        />
+      </div>
+    );
+  }
+}
+
+AsyncSelect.propTypes = propTypes;
+AsyncSelect.defaultProps = defaultProps;
+
+export default AsyncSelect;
diff --git a/superset/assets/spec/javascripts/sqllab/DatabaseSelect_spec.jsx b/superset/assets/spec/javascripts/components/AsyncSelect_spec.jsx
similarity index 58%
rename from superset/assets/spec/javascripts/sqllab/DatabaseSelect_spec.jsx
rename to superset/assets/spec/javascripts/components/AsyncSelect_spec.jsx
index 288e0cfa0fff..fb802357f403 100644
--- a/superset/assets/spec/javascripts/sqllab/DatabaseSelect_spec.jsx
+++ b/superset/assets/spec/javascripts/components/AsyncSelect_spec.jsx
@@ -1,34 +1,35 @@
 import React from 'react';
 import Select from 'react-select';
-import DatabaseSelect from '../../../javascripts/SqlLab/components/DatabaseSelect';
+import AsyncSelect from '../../../javascripts/components/AsyncSelect';
 import { shallow } from 'enzyme';
 import { describe, it } from 'mocha';
 import { expect } from 'chai';
 import sinon from 'sinon';
 
-describe('DatabaseSelect', () => {
+describe('AsyncSelect', () => {
   const mockedProps = {
-    actions: {},
+    dataEndpoint: '/slicemodelview/api/read',
+    onChange: sinon.spy(),
+    mutator: () => {},
   };
   it('is valid element', () => {
     expect(
-      React.isValidElement(<DatabaseSelect {...mockedProps} />)
+      React.isValidElement(<AsyncSelect {...mockedProps} />)
     ).to.equal(true);
   });
 
   it('has one select', () => {
     const wrapper = shallow(
-      <DatabaseSelect {...mockedProps} />
+      <AsyncSelect {...mockedProps} />
     );
     expect(wrapper.find(Select)).to.have.length(1);
   });
 
   it('calls onChange on select change', () => {
-    const onChange = sinon.spy();
     const wrapper = shallow(
-      <DatabaseSelect onChange={onChange} />
+      <AsyncSelect {...mockedProps} />
     );
     wrapper.find(Select).simulate('change', { value: 1 });
-    expect(onChange).to.have.property('callCount', 1);
+    expect(mockedProps.onChange).to.have.property('callCount', 1);
   });
 });
diff --git a/superset/assets/spec/javascripts/sqllab/QuerySearch_spec.jsx b/superset/assets/spec/javascripts/sqllab/QuerySearch_spec.jsx
index 4027ec4ec2be..aee9083c8c83 100644
--- a/superset/assets/spec/javascripts/sqllab/QuerySearch_spec.jsx
+++ b/superset/assets/spec/javascripts/sqllab/QuerySearch_spec.jsx
@@ -19,13 +19,7 @@ describe('QuerySearch', () => {
   const wrapper = shallow(<QuerySearch {...mockedProps} />);
 
   it('should have four Select', () => {
-    expect(wrapper.find(Select)).to.have.length(4);
-  });
-
-  it('updates userId on user selects change', () => {
-    wrapper.find('[name="select-user"]')
-      .simulate('change', { value: 1 });
-    expect(wrapper.state().userId).to.equal(1);
+    expect(wrapper.find(Select)).to.have.length(3);
   });
 
   it('updates fromTime on user selects from time', () => {