diff --git a/src/modules/pages/connection/connection.ts b/src/modules/pages/connection/connection.ts
index 4682418..8094b8d 100644
--- a/src/modules/pages/connection/connection.ts
+++ b/src/modules/pages/connection/connection.ts
@@ -79,6 +79,7 @@ export class Connection extends BI.Widget {
                                         right: [
                                             {
                                                 type: 'dec.connection.driver.entry',
+                                                invisible: !BI.Services.getService('dec.service.global').isAdmin(),
                                                 from: '.dec-dcm',
                                             },
                                         ],
diff --git a/src/modules/pages/connection/connection_jdbc/connection_jdbc.ts b/src/modules/pages/connection/connection_jdbc/connection_jdbc.ts
index 4dc6d0e..eff5383 100644
--- a/src/modules/pages/connection/connection_jdbc/connection_jdbc.ts
+++ b/src/modules/pages/connection/connection_jdbc/connection_jdbc.ts
@@ -23,6 +23,7 @@ export class ConnectionJdbc extends BI.Widget {
         const connectionData = this.model.connectionSelectedOne.connectionData as ConnectionJDBC;
         const {
             driver,
+            driverSource,
             database,
             user,
             originalCharsetName,
@@ -45,7 +46,7 @@ export class ConnectionJdbc extends BI.Widget {
                 {
                     type: FormItem.xtype,
                     name: BI.i18nText('Dec-Dcm_Connection_Form_Driver'),
-                    value: driver,
+                    value: BI.isKey(driverSource) ? `${driver} (${driverSource})` : driver,
                 },
                 {
                     type: FormItem.xtype,
@@ -182,9 +183,9 @@ export class ConnectionJdbc extends BI.Widget {
                             unit: BI.i18nText('BI-Basic_Seconds'),
                         }, {
                             type: FormItem.xtype,
-                            invisible: BI.parseInt(fetchSize) < 0,
+                            invisible: fetchSize < 0 && fetchSize !== -2,
                             name: 'Fetchsize',
-                            value: fetchSize,
+                            value: fetchSize === -2 ? '' : fetchSize,
                         },
                     ],
                 },
diff --git a/src/modules/pages/maintain/forms/components/form.jdbc.ts b/src/modules/pages/maintain/forms/components/form.jdbc.ts
index c73ff73..d9fe88c 100644
--- a/src/modules/pages/maintain/forms/components/form.jdbc.ts
+++ b/src/modules/pages/maintain/forms/components/form.jdbc.ts
@@ -148,7 +148,8 @@ export class FormJdbc extends BI.Widget {
                                         const value = this.form.driver.getValue();
                                         const connectionData = this.options.formData.connectionData as ConnectionJDBC;
                                         const connectionType = getJdbcDatabaseType(connectionData.database, connectionData.driver);
-                                        const url = connectionType.urls ? connectionType.urls[value.driver] : connectionType.url;
+                                        // DEC-2020
+                                        const url = (connectionType.urls && connectionType.urls[value.driver]) || connectionType.url;
                                         this.form.url.setValue(url);
                                         const urlInfo = resolveUrlInfo(url, connectionData.database);
                                         this.form.host.setValue(urlInfo.host);
@@ -712,7 +713,7 @@ export class FormJdbc extends BI.Widget {
                             el: {
                                 type: BI.VerticalLayout.xtype,
                                 cls: 'bi-border-top',
-                                invisible: BI.parseInt(fetchSize) < 0,
+                                invisible: fetchSize < 0 && fetchSize !== -2,
                                 items: [
                                     {
                                         el: {
@@ -723,7 +724,7 @@ export class FormJdbc extends BI.Widget {
                                                 $value: 'fetch-size',
                                                 width: 300,
                                                 allowBlank: true,
-                                                value: fetchSize,
+                                                value: fetchSize === -2 ? '' : fetchSize,
                                                 watermark: 'Fetchsize',
                                                 validationChecker: [{
                                                     errorText: BI.i18nText('Dec-Dcm_Connection_Check_Fetch_Size_Range'),
@@ -857,7 +858,7 @@ export class FormJdbc extends BI.Widget {
                 creator: Dec ? Dec.personal.username : '',
                 principal: this.form.principal.getValue(),
                 keyPath: this.form.keyPath.getValue(),
-                fetchSize: BI.parseInt(this.form.fetchSize.getValue()),
+                fetchSize: BI.isEmptyString(this.form.fetchSize.getValue()) ? -2 : BI.parseInt(this.form.fetchSize.getValue()),
                 connectionPoolAttr: {
                     initialSize: this.form.initialSize.getValue(),
                     maxActive: this.form.maxActive.getValue(),