preston-footprint opened a new issue, #2959:
URL: https://github.com/apache/datafusion-sqlparser-rs/issues/2959
Redshift nests `/* */` comments, as Postgres does, but `RedshiftSqlDialect`
doesn't set `supports_nested_comments`, so sqlparser ends the comment at the
first `*/`.
```sql
select 1 /* /* */ , ' */ , pg_backend_pid() -- '
```
- sqlparser 0.64.0: `MultiLineComment(" /* ")`, then a string; parses as
`SELECT 1, ' */ , pg_backend_pid() -- '`.
- Redshift: two columns, `1` and `1073905994`, so the comment ran to the
second `*/`.
The overlapping form `select 1 /*/*/ , ' */ */ , pg_backend_pid() -- '`
behaves the same way on both sides.
Postgres documents nesting in "Comments"
(https://www.postgresql.org/docs/8.0/sql-syntax.html#SQL-SYNTAX-COMMENTS), and
Redshift is based on PostgreSQL 8.0.2.
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