| PostgreSQL | Full | Yes | Table or catalog registration, pgvector KNN | docs/postgres/ |
| MySQL | Full | Yes | Table or catalog registration | docs/mysql/ |
| SQLite | Full | Yes | Table or catalog registration, sqlite-vec KNN, FTS | docs/sqlite/ |
| MongoDB | Full | No | Collections with point lookups | docs/mongo/ |
| Redis | Full | No | Hashes mapped to SQL rows | docs/redis/ |
| DynamoDB | Full | Yes | Items mapped to SQL rows, table or catalog registration, scan + filter pushdown | docs/dynamodb/ |
| SeekDB | Full | Yes | MySQL-wire CRUD, native FULLTEXT FTS, HNSW VECTOR KNN | docs/seekdb/ |
| ClickHouse | Read | Yes | Columnar OLAP over HTTP, filter/limit pushdown, table or catalog registration | docs/clickhouse/ |
| Lance | Read (job-write) | No | KNN vector search, BM25 FTS; job destination | docs/lance/ |
| CSV | Read | No | Local or remote CSV files | docs/server.md |
| Parquet | Read | No | Local or remote Parquet files | docs/server.md |
| JSON / NDJSON | Read | No | Local or remote JSON files | docs/cli.md |
| S3 / GCS / Azure | Read | No | CSV, Parquet, Lance from object stores | docs/S3_USAGE.md |
| Apache Iceberg | Read | No | Schema evolution, partition pruning | docs/iceberg/ |
| InfluxDB 3 | Read | No | Time-series measurements over Arrow Flight SQL | docs/influxdb/ |
| Open Connector | Read | Yes | SaaS resources as stable SQL tables via a self-hosted Open Connector gateway; GitHub pack (repos, issues, PRs, reviews, commits, workflow runs, releases — guide), Slack pack (conversations, users, files — guide), open_connector_query / open_connector_scan UDTFs, filter + limit pushdown, bounded TTL cache (more provider packs rolling out) | docs/open-connector.md, demo |
| Documents | Read | No | PDF/Office/ODF/image -> per-page markdown, tables, images (local directories or S3 prefixes; documents feature) | docs/documents.md |