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From: PG Bug reporting form <[email protected]>
To: [email protected]
Cc: [email protected]
Subject: BUG #19419: Cannot create custom functions using python3u
Date: Thu, 26 Feb 2026 15:54:10 +0000
Message-ID: <[email protected]> (raw)

The following bug has been logged on the website:

Bug reference:      19419
Logged by:          yafei wu
Email address:      [email protected]
PostgreSQL version: 18.2
Operating system:   windows
Description:        

When I was installing the Windows version of PostgreSQL 18.2.1, I executed
the command "CREATE EXTENSION plpython3u;". Error message
[2026-02-26 23:35:02] [58P01] Error: Unable to load library
"D:/postgresql/PostgreSQL/18/lib/plpython3.dll": The specified module could
not be found.
[2026-02-26 23:35:02] At location: SQL statement "CREATE FUNCTION
plpython3_call_handler() RETURNS language_handler" [2026-02-26 23:35:02]
LANGUAGE c AS '$libdir/plpython3'"
[2026-02-26 23:35:02] Extension script file "plpython3u--1.0.sql", near line
3
When I placed the python313.dll file in the installation directory of Python
3.13 under the C:\Windows\System32 directory, and executed the command
"CREATE EXTENSION plpython3u;" Success, but when creating the Python custom
function, an error occurred.
[2026-02-26 23:45:01] An I/O error occurred while sending to the backend.
[2026-02-26 23:45:01] Received an irrecoverable error. The connection has
been damaged.

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