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Tablespace for temporary objects and sort files

From: Albert Cervera Areny <albertca(at)hotpop(dot)com>
To: pgsql-patches(at)postgresql(dot)org
Subject: Tablespace for temporary objects and sort files
Date: 2006-10-24 22:45:48
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-patches

I'm trying to introduce myself into postgresql development and I'm working on 
the "tablespace for temporary objects and sort files" TODO item. The attached 
patch shows what I've already done. The GUC is currently 
called "temp_tablespaces". 

The tablespace changes correctly for me when creating temporary tables.  I've 
got some questions though:
	How can I test that the tablespace is correctly used for sort files? Is there 
an easy way? Or should I reduce work_mem to a minimum, populate the database 
with data and try an "ORDER BY"?

	The GetTempTablespace function correctly returns a different tablespace each 
time is called, but I store the position of the last tablespace used with an 
integer and iterate through the list of tablespaces each time. I tried to 
keep the iterator from call to call but I got a segfault, I imagine due to 
the memory context. Should I try to keep the iterator? How can I do it?

Hope the diff and idents are ok. Please let me know if there's something wrong 
with them.


Attachment: temp_tablespaces.diff
Description: text/x-diff (6.9 KB)


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