v1.1 — Drivers, Flight SQL, Filter Groups

What's New

DB-API 2.0 Drivers

• 7 database drivers: ob-duckdb, ob-postgres, ob-snowflake, ob-clickhouse, ob-databricks, ob-dremio, ob-bigquery
• Shared ob-driver-core with OBML query compilation, YAML model detection, and PEP 249 exceptions

Arrow Flight SQL Server

• ob-flight-extension — connect BI tools (DBeaver, Tableau, Power BI) directly to the semantic layer
• Token-based authentication and catalog/schema discovery

Query Execution

• POST /v1/query/execute — compile OBML and run SQL against live databases
• Native DuckDB path with read_only=True for notebook compatibility

Filter Groups (AND/OR/NOT)

• Recursive FilterGroup model with logic: and|or and negated: true support
• Works at both measure-level (filters: list) and query-level (where:/having:)
• Updated JSON schemas (obml-schema.json, query-schema.json)

dimensionsExclude Relaxed

• Anti-join queries now work with any 2+ dimensions — no longer requires independent branches
• CROSS JOIN x EXCEPT pattern works across star and snowflake schemas

Other Improvements

• Qualified DataObject.Column references in WHERE filters with auto-join
• description property on all OBML model objects
• OSI converter roundtrip: preserve OBML-only properties in custom_extensions
• TPC-H quickstart notebook with interactive examples
• CFL: skip NULL padding for UNION ALL BY NAME dialects
• Version bumped to 1.1.0

Stats

• 539 tests (419 unit + 120 integration)
• 148 files changed, ~15,700 lines added