# E0004

A `{` or `}` in a sink literal such as `sql"..."`, which never interpolates. Write `\{` or `\}` for a literal brace.

**Machine-applicable fix:** none.

## Example

This program fails with `E0004`.

```oska
use std.sql

fn main() {
    let query = sql"SELECT {id}"
}
```

## Fixed

The same program, fixed.

```oska
use std.sql

fn main() {
    let query = sql"SELECT 1"
}
```

Listed in the [checker notes](/checker.md#e0004). `oskac explain E0004` prints this entry offline.