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- Python Function API 11924
- You can create a DuckDB user-defined function (UDF) from a Python function so it can be used in SQL queries. Similarly to regular functions , they need to have a name, a return type and parameter types. Creating Functions To register a Pyth
...query cannot use that query's connection; use a separate connection from cursor() . A cursor of that connection works: def lookup(x: int) -> int: cur = con.cursor() try: return cur.execute("SELECT 41 + ?", [x]).fetchone()[0] finally: cur.close() con.cr...eate_function("lookup", lookup) print(con.sql("SELECT lookup(1)").fetchall()) [(42,)] Using Partial Functions DuckDB UDFs can also be created wi... - https://man.mtool.work/duckdb/2.0/clients/python/function.html
- Deploy as Native Image 8129
- Overview The JDBC driver runs inside GraalVM Native Image executables. Graal Native Image compiles a Java application ahead of time into a standalone binary that starts in milliseconds and requires no JVM on the target machine, which suits
...under the platform convention: libduckdb_java.so on Linux, libduckdb_java.dylib on macOS, duckdb_java.dll on Windows. The lookup is anchored to the executable rather than the working directory, so the program runs correctly from anywhere. This option... - https://man.mtool.work/duckdb/2.0/clients/java/deploy_native_image.html
- Troubleshoot 7831
- Overview This page collects common issues encountered when using the DuckDB JDBC driver, together with their workarounds. If you run into a problem that is not covered here, search the driver's issue tracker on GitHub. Driver Class Not Foun
...sion 0xffffffff, required by ⟨path⟩/libduckdb_java.⟨suffix⟩ This is what the library's JNI_OnLoad reports when an internal lookup failed, and the cause is the same missing metadata, not a JNI version problem. Native Image: UnsatisfiedLinkError: Can't l... - https://man.mtool.work/duckdb/2.0/clients/java/troubleshoot.html
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