Merge pull request #19811 from ClickHouse/backport/20.12/19788

Backport #19788 to 20.12: Fix trivial bug in arrayEnumerateUniq

src/Functions/array/arrayEnumerateExtended.h

@@ -353,6 +353,9 @@ bool FunctionArrayEnumerateExtended<Derived>::execute128bit(
         keys_bytes += key_sizes[j];
     }
 
+    if (keys_bytes > 16)
+        return false;
+
     executeMethod<MethodFixed>(offsets, columns, key_sizes, nullptr, res_values);
     return true;
 }

tests/queries/0_stateless/01677_array_enumerate_bug.reference

+[1,1,2]
+[1,1,1]

tests/queries/0_stateless/01677_array_enumerate_bug.sql

+-- there was a bug - missing check of the total size of keys for the case with hash table with 128bit key.
+
+SELECT arrayEnumerateUniq(arrayEnumerateUniq([toInt256(10), toInt256(100), toInt256(2)]), [toInt256(123), toInt256(1023), toInt256(123)]);
+
+SELECT arrayEnumerateUniq(
+    [111111, 222222, 333333],
+    [444444, 555555, 666666],
+    [111111, 222222, 333333],
+    [444444, 555555, 666666],
+    [111111, 222222, 333333],
+    [444444, 555555, 666666],
+    [111111, 222222, 333333],
+    [444444, 555555, 666666]);