diff --git a/src/modules/pages/maintain/forms/components/form.jdbc.ts b/src/modules/pages/maintain/forms/components/form.jdbc.ts
index 84f52d4..a527cd6 100644
--- a/src/modules/pages/maintain/forms/components/form.jdbc.ts
+++ b/src/modules/pages/maintain/forms/components/form.jdbc.ts
@@ -537,7 +537,7 @@ export class FormJdbc extends BI.Widget {
                                 cls: 'bi-border',
                                 allowBlank: true,
                                 watermark: BI.i18nText('Dec-Dcm_Connection_Form_Place_Input'),
-                                value: api.getPlain(validationQuery),
+                                value: api.getPlain(validationQuery || ''),
                                 width: 300,
                                 height: 100,
                                 ref: (_ref: TextAreaEditor) => {