Commit a63b631
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Multi-graph support with GraphManager and FROM clause (#6)
Add multi-graph support with FROM clause and GraphManager
Adds the ability to query across multiple graph databases using SQLite's
ATTACH mechanism and Cypher's FROM clause syntax.
Core Features:
- FROM clause in MATCH queries: `MATCH (n:Person) FROM other_graph RETURN n`
- graph() function for provenance tracking: returns source database name
- GraphManager API for Python and Rust to manage multiple graph databases
- Cross-graph queries via coordinator connection with automatic ATTACH
Implementation:
- Parser: Added FROM clause recognition in MATCH patterns
- AST: New graph_name field on match patterns
- SQL Generation: Table prefixing with database schema names
- Query Dispatch: Schema context propagation through query pipeline
API (Python):
- `graphs(path)` context manager for GraphManager
- `gm.create/open/drop/list()` for graph lifecycle
- `gm.query(cypher, graphs=[...])` for cross-graph Cypher
- `gm.query_sql(sql, graphs=[...])` for raw SQL access
API (Rust):
- `GraphManager::open(path)` with extension auto-discovery
- Same lifecycle methods as Python
- Comprehensive test coverage matching Python test suite
Testing:
- New functional test: 31_multigraph_queries.sql (19 test cases)
- Python tests: test_manager.py with cross-graph query tests
- Rust tests: 80+ new integration tests for feature parity1 parent fc84558 commit a63b631
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lines changed- .github/workflows
- .metis/strategies/NULL/initiatives/GQLITE-I-0022
- tasks
- bindings
- python
- src/graphqlite
- tests
- rust
- src
- graph
- tests
- docs/src
- how-to
- reference
- src
- backend
- executor
- parser
- transform
- include
- parser
- transform
- tests
- functional
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