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Posted to github@datafusion.apache.org by "s5dsn-eqee (via GitHub)" <gi...@apache.org> on 2026/09/21 18:45:49 UTC
[I] ClickHouse: `ALTER TABLE ... ADD COLUMN ... FIRST | AFTER col` fails to parse [datafusion-sqlparser-rs]
s5dsn-eqee opened a new issue, #2534:
URL: https://github.com/apache/datafusion-sqlparser-rs/issues/2534
```sql
ALTER TABLE t ADD COLUMN c UInt8 AFTER a
-- sql parser error: Expected: end of statement, found: AFTER
```
ClickHouse [supports this](https://clickhouse.com/docs/sql-reference/statements/alter/column), and the parser already handles it for MySQL. `parse_column_position` is hardcoded to `dialect_of!(MySqlDialect | GenericDialect)`, and this should become a `Dialect` trait method so ClickHouse can enable it.
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Re: [I] ClickHouse: `ALTER TABLE ... ADD COLUMN ... FIRST | AFTER col` fails to parse [datafusion-sqlparser-rs]
Posted by "LucaCappelletti94 (via GitHub)" <gi...@apache.org>.
LucaCappelletti94 closed issue #2534: ClickHouse: `ALTER TABLE ... ADD COLUMN ... FIRST | AFTER col` fails to parse
URL: https://github.com/apache/datafusion-sqlparser-rs/issues/2534
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