## Neo4j Version Compatibility Notes

Neo4j had significant breaking changes between version 4.x and 5.x regarding schema introspection:

**Neo4j 5.x+ (current):**
- Use `SHOW INDEXES` instead of `CALL db.indexes()`
- Use `SHOW CONSTRAINTS` instead of `CALL db.constraints()`
- Use `CALL db.schema.visualization()` for full schema (works in both versions)

**Neo4j 4.x and earlier:**
- Use `CALL db.indexes()`
- Use `CALL db.constraints()`

**Safe queries that work across versions:**
- `CALL db.schema.visualization()` - Full schema visualization
- `CALL db.labels()` - Get all node labels
- `CALL db.relationshipTypes()` - Get all relationship types

When querying indexes or constraints, prefer the `SHOW` commands for Neo4j 5+ environments.