diff --git a/internal/core/plugins/api_utils.go b/internal/core/plugins/api_utils.go
index 93531fe..e002b0d 100644
--- a/internal/core/plugins/api_utils.go
+++ b/internal/core/plugins/api_utils.go
@@ -81,6 +81,16 @@ func luaValueToGo(v lua.LValue) interface{} {
 			}
 			return arr
 		}
+		// Check if table has any keys at all — empty tables are ambiguous.
+		// DB queries return empty tables when no rows match; the frontend
+		// expects a valid array [] (with .length), not {} (where .length is undefined).
+		hasKeys := false
+		val.ForEach(func(k lua.LValue, v lua.LValue) {
+			hasKeys = true
+		})
+		if !hasKeys {
+			return make([]interface{}, 0)
+		}
 		m := make(map[string]interface{})
 		val.ForEach(func(k lua.LValue, v lua.LValue) {
 			m[fmt.Sprintf("%v", k)] = luaValueToGo(v)