goldmedal commented on PR #1541:
URL:
https://github.com/apache/datafusion-sqlparser-rs/pull/1541#issuecomment-2490464568
We should refactor to integrate `Subscript` and `MapAccessSyntax::Bracket`,
as they are similar and difficult to distinguish at the SQL layer.
For example, DuckDB allows the following SQL, which is currently invalid in
our parser:
```sql
select [MAP {2:{a:1, b:[2,3,4]}}, MAP {2:{a:1, b:[2,3,4]}}][1][2][1].b[1:2]
as result;
┌─────────┐
│ result │
│ int32[] │
├─────────┤
│ [2, 3] │
└─────────┘
```
The access pattern `[1][2][1].b[1:2]` includes both `Subscript` and
`MapAccess`. We cannot parse all these as a `MapAccessKey` following the `.`
token.
https://github.com/apache/datafusion-sqlparser-rs/blob/fad2ddd6417e2e4d149c298d1977088124a30358/src/ast/mod.rs#L805-L808
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