fix textstorage panic (#2974)

Co-authored-by: James Cor <[email protected]>

Author: jycor

enginetest/queries/script_queries.go

@@ -8436,6 +8436,22 @@ where
 			},
 		},
 	},
+	{
+		Name:    "hash tuples",
+		Dialect: "mysql",
+		SetUpScript: []string{
+			"CREATE TABLE test (id longtext);",
+			"INSERT INTO test (id) VALUES ('test_id');",
+		},
+		Assertions: []ScriptTestAssertion{
+			{
+				Query: "SELECT * FROM test WHERE id IN ('test_id');",
+				Expected: []sql.Row{
+					{"test_id"},
+				},
+			},
+		},
+	},
 }
 
 var SpatialScriptTests = []ScriptTest{

sql/expression/in.go

@@ -274,7 +274,10 @@ func hashOfSimple(ctx *sql.Context, i interface{}, t sql.Type) (uint64, error) {
 			if err != nil {
 				return 0, err
 			}
-			str = converted.(string)
+			str, _, err = sql.Unwrap[string](ctx, converted)
+			if err != nil {
+				return 0, err
+			}
 		}
 	} else {
 		x, err := convertOrTruncate(ctx, i, t.Promote())