mz_expr/scalar/func/impls/
varchar.rs

1// Copyright Materialize, Inc. and contributors. All rights reserved.
2//
3// Use of this software is governed by the Business Source License
4// included in the LICENSE file.
5//
6// As of the Change Date specified in that file, in accordance with
7// the Business Source License, use of this software will be governed
8// by the Apache License, Version 2.0.
9
10use mz_repr::adt::varchar::VarChar;
11
12// This function simply allows the expression of changing a's type from varchar to string
13sqlfunc!(
14    #[sqlname = "varchar_to_text"]
15    #[preserves_uniqueness = true]
16    #[inverse = to_unary!(super::CastStringToVarChar {
17        length: None,
18        fail_on_len: false,
19    })]
20    fn cast_var_char_to_string<'a>(a: VarChar<&'a str>) -> &'a str {
21        a.0
22    }
23);