fix(binder): fix panic when index on non composite type (#4763)

* fix panic

* fix format

* add test

e2e_test/batch/aggregate/aggregate2/test.slt.part

@@ -0,0 +1,11 @@
+# Copied from https://github.com/duckdb/duckdb (MIT licensed).
+# Copyright 2018-2022 Stichting DuckDB Foundation
+
+statement ok
+SET RW_IMPLICIT_FLUSH TO true;
+
+statement ok
+create table t(v1 int);
+
+statement ok
+select * from t where v1[1]=1;

e2e_test/batch/basic/array_access.slt.part

@@ -23,3 +23,10 @@ NULL
 
 statement error
 select (ARRAY['foo', 'bar'])[];
+
+# array access is not possible for non-composite types
+statement error
+select (1::INT)[1];
+
+statement error
+select ('a'::VARCHAR)[1];

src/frontend/src/binder/expr/value.rs

@@ -123,7 +123,11 @@ impl Binder {
                     FunctionCall::new_unchecked(ExprType::ArrayAccess, indexs, *return_type).into();
                 Ok(expr)
             }
-            _ => panic!("Should be a List"),
+            data_type => Err(ErrorCode::BindError(format!(
+                "array index applied to type {}, which is not a composite type",
+                data_type
+            ))
+            .into()),
         }
     }