diff --git a/backend-spring/src/main/java/com/erp/service/TableManagementService.java b/backend-spring/src/main/java/com/erp/service/TableManagementService.java
index af045a51..138064c6 100644
--- a/backend-spring/src/main/java/com/erp/service/TableManagementService.java
+++ b/backend-spring/src/main/java/com/erp/service/TableManagementService.java
@@ -10,6 +10,7 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.sql.SQLException;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -941,6 +942,20 @@ public class TableManagementService extends BaseService {
     @SuppressWarnings("unchecked")
     private List<String> parseColumnArray(Object cols) {
         if (cols instanceof List) return (List<String>) cols;
+        if (cols instanceof java.sql.Array arr) {
+            try {
+                Object raw = arr.getArray();
+                if (raw instanceof Object[] arrObj) {
+                    return Arrays.stream(arrObj)
+                            .filter(Objects::nonNull)
+                            .map(Object::toString)
+                            .filter(s -> !s.isBlank())
+                            .collect(Collectors.toList());
+                }
+            } catch (SQLException e) {
+                log.warn("parseColumnArray: java.sql.Array decode 실패 — fallback", e);
+            }
+        }
         if (cols instanceof String s) {
             return Arrays.stream(s.replace("{", "").replace("}", "").split(","))
                     .filter(c -> !c.isBlank())
diff --git a/frontend/app/(main)/admin/systemMng/tableMngList/page.tsx b/frontend/app/(main)/admin/systemMng/tableMngList/page.tsx
index 0167f4db..f3e41f02 100644
--- a/frontend/app/(main)/admin/systemMng/tableMngList/page.tsx
+++ b/frontend/app/(main)/admin/systemMng/tableMngList/page.tsx
@@ -381,7 +381,7 @@ export default function TableManagementPage() {
       if (response.data.success) {
         const data = response.data.data;
         setConstraints({
-          primaryKey: data.primaryKey ?? { name: "", columns: [] },
+          primaryKey: data.primary_key ?? { name: "", columns: [] },
           indexes: data.indexes ?? [],
         });
       }