From 4d636319d9132834c06c8d16857a04265c2ce1fe Mon Sep 17 00:00:00 2001
From: chulanovskyi <oleg.chulanovskyi@binary-studio.com>
Date: Fri, 10 Jul 2026 15:19:23 +0300
Subject: [PATCH] feat: filter out empty check constraints from the final DDL

---
 forward_engineering/ddlProvider.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/forward_engineering/ddlProvider.js b/forward_engineering/ddlProvider.js
index 0170a32..3448e01 100644
--- a/forward_engineering/ddlProvider.js
+++ b/forward_engineering/ddlProvider.js
@@ -125,6 +125,10 @@ module.exports = (baseProvider, options, app) => {
 		hydrateCheckConstraint(checkConstraint) {
 			const buildExpression = expr => {
 				const plainExpr = _.trim(expr).replace(/^\(([\s\S]*)\)$/, '$1');
+				if (!plainExpr) {
+					return '';
+				}
+
 				return `CHECK (${plainExpr})`;
 			};
 
@@ -494,6 +498,10 @@ module.exports = (baseProvider, options, app) => {
 		 * @return {string}
 		 */
 		createCheckConstraintStatement(tableName, checkConstraint, dbData) {
+			if (!checkConstraint.expression?.trim?.()) {
+				return '';
+			}
+
 			const table = prepareName(tableName, dbData.databaseName);
 
 			return assignTemplates(templates.alterTable, {