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base repository: postgresql-cfbot/postgresql
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  • 5 commits
  • 9 files changed
  • 2 contributors

Commits on Aug 30, 2025

  1. Prevent internal error at concurrent CREATE OR REPLACE FUNCTION 

    Previously, concurrent CREATE OR REPLACE FUNCTION commands could fail
with an internal error "tuple concurrently updated". This occurred
because multiple sessions attempted to modify the same catalog tuple
simultaneously.

To prevent this, ensure that an exclusive lock on the function object
is acquired earlier in the process.

Additionally, if the target function is dropped by another session while
waiting for the lock, a new function is created instead.
    @yugo-n
    yugo-n authored and Commitfest Bot committed Aug 30, 2025
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  2. Prevent internal error caused by concurrent ALTER FUNCTION 

    Previously, concurrent ALTER FUNCTION commands could fail with an
internal error "tuple concurrently updated". This occurred
because multiple sessions attempted to modify the same catalog tuple
simultaneously.

To prevent this, ensure that an exclusive lock on the function object
is acquired earlier in the process.

Additionally, if the target function is dropped by another session while
waiting for the lock, an appropriate error is raised to indicate the
object no longer exists.
    @yugo-n
    yugo-n authored and Commitfest Bot committed Aug 30, 2025
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  3. Improve error reporting for concurrent updates on system catalog tuples 

    Previously, when multiple sessions attempted to modify the same system
catalog tuple concurrently due to insufficient locking, DDL commands could
fail with an internal error:

ERROR:  tuple concurrently updated

This commit improves the behavior by reporting a more appropriate and
user-facing error message in such cases, making it easier for users to
understand the cause of the failure.
    @yugo-n
    yugo-n authored and Commitfest Bot committed Aug 30, 2025
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  4. Improve error reporting for unique key violations in system catalogs 

    Previously, when a unique constraint violation occurred in a system catalog,
typically due to a concurrent session creating an object with the same key,
a low-level error like the following was raised by nbtree code:

 ERROR:  duplicate key value violates unique constraint ...

However, this message is not very user-friendly, as users are not directly
inserting rows into the system catalogs.

This commit improves the error reporting by generating a more descriptive and
user-facing error message in such cases, making it easier to understand the
cause of the failure and its likely relation to concurrent DDL activity.
    @yugo-n
    yugo-n authored and Commitfest Bot committed Aug 30, 2025
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  5. [CF 5681] v9 - Prevent internal error at concurrent CREATE OR REPLACE… 

    … / ALTER FUNCTION

This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5681

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/[email protected]
Author(s): Yugo Nagata
    Commitfest Bot committed Aug 30, 2025
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