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I ran the native PostgreSQL and MySQL ADBC drivers against 28 databases that speak their protocols. Half stopped. Then I found a bug in my own driver.
The Apache Arrow ADBC documentation now lists adbcBridge on its Tools & Integrations page — seven days after I released v0.1.0. I filed the listing request on August 29; on August 31 a project member invited a PR, and it was merged six hours after the invitation. What the entry says, how the week that earned it went, and what it changes for anyone with an ODBC-only database.
Part 2 of the adbcBridge story. Running one workload through 46 databases on three operating systems turned up 24 defects that belong to other projects — twelve of them return wrong or lost data under SQL_SUCCESS. Every one is filed upstream with a reproduction that needs no adbcBridge in the stack. Here is the ledger, what the bugs have in common, and what happened when the maintainers read them: within the first week, two fixes landed upstream and four more fix PRs went up.
Native Apache Arrow ADBC drivers exist for a handful of databases. The other few hundred ship an ODBC driver and nothing else. adbcBridge is one plain-C11 shared library that turns every ODBC driver on your machine into an Arrow-native ADBC driver — columnar record batches out, bulk ingest in — from Python, Rust, Go, Java and C#. Today it is public: 46 databases verified on Linux, 41 on macOS, 45 on Windows, five languages measured against all of them, and every figure named with the laptop and the load it was taken under.