On Tue, Apr 5, 2011 at 11:22 AM, Zeev Ben-Sender <zeevb@xxxxxxxxxxxxxx> wrote:
Hi,
Having the update statement like this:
UPDATE my_table SET (COL1 = ‘05cf5219-38e6-46b6-a6ac-5bbc3887d16a’, COL2 = 28) WHERE COL3 = 35;
Will this statement result indexes rebuild if COL1 and COL2 already equal ‘05cf5219-38e6-46b6-a6ac-5bbc3887d16a’ and 28?
Thank you
Easy to test. If the row moved to another page, then yes, else no.
To see if the row moved, select the ctid and compare before and after:
select ctid from my_table where COL3=35;
UPDATE ...
select ctid from my_table where COL3=35;
The ctid is returned as a tuple indicating the page number and position within that page.
