From 56e393f0497db54f962367e29757d2e862790897 Mon Sep 17 00:00:00 2001
From: Brieuc Dubois <git@bhasher.com>
Date: Sat, 2 Mar 2024 09:38:48 +0100
Subject: [PATCH] cols function

---
 solution.pl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/solution.pl b/solution.pl
index 4ff6ff5..887296f 100644
--- a/solution.pl
+++ b/solution.pl
@@ -31,7 +31,9 @@ order as they were supplied to create table/2).
 If the given table does not exist, the predicate must throw a descriptive
 exception (use throw/1).
 */
-/* cols(Table, Cols). */
+cols(Table, Cols) :-
+	(tabl(Table, _) -> tabl(Table, Cols));
+		throw("Table doesn't exist").
 
 :- dynamic row/2.
 /*