query-engine/examples/scripts/README.md

# Example Scripts

These scripts can be executed with:

```bash
make script SCRIPT=examples/scripts/ancestor.ech
cargo run -- script examples/scripts/ancestor.ech
```

Available examples:

- `ancestor.ech`: transitive closure over `Parent/2`
- `employee_departments.ech`: existential rule that creates labeled nulls
- `negation.ech`: stratified negation-as-failure with `NOT` in rule bodies
- `same_team.ech`: conjunctive query with a self-join
- `skolem_chase.ech`: Skolem chase with deterministic labeled nulls
- `sql_aggregate.ech`: `GROUP BY` with `COUNT`, `SUM`, `MIN`, `MAX`, and `AVG`
- `sql_basic.ech`: named-column filtering in the SQL frontend
- `sql_filter_ops.ech`: inequality, `OR`, `LIMIT`, and integer literals
- `sql_join.ech`: multi-table SQL join over predicate-backed tables
- `sql_self_join.ech`: self-join with SQL table aliases
- `sql_order_by.ech`: ordered SQL output with `ORDER BY`