To check if a table has an ART index in regular DuckDB, you can use the duckdb_indexes() function. This function provides metadata about secondary indexes, including ART indexes, available in the DuckDB instance.
Here's an example query to list all indexes for a specific table:
```
SELECT * FROM duckdb_indexes() WHERE table_name = 'your_table_name';
LBKSReplace `'your_table_name'` with the name of your table.
Would you like more detail?
Sources:
- [https://duckdb.org/docs/guides/meta/duckdb_environment](https://duckdb.org/docs/guides/meta/duckdb_environment)
- [https://duckdb.org/docs/sql/duckdb_table_functions#duckdb_functions](https://duckdb.org/docs/sql/duckdb_table_functions#duckdb_functions)