Database Provider Compatibility
A provider name in source, documentation, or a service catalog is not proof of a supported database combination. Use these evidence levels:
| Level | Meaning |
|---|---|
| Source-present | A current runtime source module/provider exists. |
| Artifact-observed | A matching released artifact or generated dependency was observed. |
| Generated | A current target emitted the provider dependency/configuration. |
| Tested | Generation, build, database start, query, mutation, and relevant provider behavior passed. |
| Supported | Maintainers publish a support lifetime and response/update policy. |
Current Evidence
| Stack/provider family | Highest evidence in this repository | What is still required |
|---|---|---|
| Java PostgreSQL, MySQL, SQLite, Oracle, DB2, DM8, SAP HANA, SQL Server, and DuckDB | Tested on 2026-08-12 with generated code and real databases: 9 tests / 0 failures / 0 errors / 0 skipped. | Published artifact/database/driver version ranges, load limits, and support lifetime. |
| Rust PostgreSQL, MySQL, and SQLite | Generated API and real-database chain tested in the 2026-08-12 campaign. | Retained per-provider CI artifacts, published version ranges, MSRV, load/concurrency limits, and support lifetime. |
| Go PostgreSQL, MySQL, and SQLite | Generated three-database matrix tested; runtime statement coverage reached 94.9%. | Published driver/database ranges and operational support policy. |
| Python PostgreSQL, MySQL, and SQLite | Generated real async SQL integrations tested; 73 runtime tests passed. | Published Python/database/driver ranges and operational support policy. |
| C# / .NET PostgreSQL, MySQL, SQLite, and SQL Server | Generated database integration tested; 124 runtime tests passed. | Published .NET/database/driver ranges and operational support policy. |
| TypeScript PostgreSQL, MySQL, and SQLite | Generated Node SQL matrix tested; browser-root isolation separately verified. | Published Node/database/driver ranges and operational support policy. |
| Rust Meilisearch | Documented search-provider family; not version-tested here. | Define supported query/mutation semantics and test against a named server version. |
| Rust memory | Runtime path documented; not promoted to provider compatibility evidence here. | Generated API tests covering query/mutation semantics and differences from SQL providers. |
| Java portable SQL/JDBC providers | Source architecture present. | Platform implementation, transaction/schema behavior, and application integration evidence. |
| Java Snowflake | Source/configuration path present; not executed in the 2026-08-12 matrix. | A runnable database service, full generated persistence test, and published support range. |
No row is currently labeled Supported because this repository does not contain a formal provider support-lifetime policy.
For the exact matrix, test contract, commits, and preserved report excerpts, see the Polyglot Runtime and Database Matrix and 2026-08-12 evidence record.
Required Provider Test Matrix
For each database and driver combination, retain:
- generator/client/runtime/provider/database/driver versions;
- generated dependency and configuration manifests;
- schema creation/verification behavior and migration diff;
- parameter binding and representative type round trips;
- filter, projection, ordering, pagination, relation, and aggregate results;
- insert, update, optimistic locking, delete/recover where applicable;
- graph transaction rollback on child failure;
- ID allocation, timestamp/time-zone, collation, Unicode, decimal, and null behavior;
- pool, timeout, TLS, retry, failover, logging, and credential configuration;
- clean test output, known limitations, and rollback plan.
Switching Providers
Keep generated business queries provider-agnostic, but do not assume provider semantics are interchangeable. Before switching, regenerate from the same model, compare dependency/metadata/schema output, run the required matrix, and retain the old provider configuration and database rollback path.
See Switch Database Provider, Java Compatibility Guide, and Rust Compatibility Guide.