Re: [HACKERS] Change lock requirements for adding a trigger

[Decibel!]

On May 30, 2008, at 9:51 AM, Simon Riggs wrote:

On Thu, 2008-05-29 at 19:18 -0500, Decibel! wrote:

Is there a reason that we can't add a trigger to a table while a
select is running? This is a serious pain when trying to setup
londiste or slony.

This is constrained by locking.

There are a subset of DDL commands that might be able to be performed
with just an ExclusiveLock or ShareLock rather than an

apply to, but its do-able since CREATE INDEX already does this.

AccessExclusiveLock. Nobody has studied which sub-statements this might

--
Decibel!, aka Jim C. Nasby, Database Architect  [EMAIL PROTECTED]
Give your computer some brain candy! www.distributed.net Team #1828

Is there a good way to determine this other than depending on knowledge of the source code?

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