Hello. Hopefully, this is the right mailing list to send
this type of question too.
System:
I am running the newest 7.03 build on a dual 866 Pentium III
with a 128M raid card.
I have found an error that is quite odd.
I have a table that is supposed to keep a map between
urls and ids. Each url in the table should be unique.
Thus I have
Create table "urlmap" (
"url" text not NULL,
"id" int4 not NULL,
PRIMARY KEY ("url"),
UNIQUE ("id","url") );
After inserting a number of urls (via spidering) i did the following.
I vacuumed the db : vacuum verbose analyze.
First:
select * from urlmap where url='blah blah';
Here I got back only one row. Good.
Then i went ahead reindexed the table: I recieved the error:
Cannot create unique index. Table contains non-unique values.
Same problem occurs if I drop the indicies and try to recreate them.
I then :
select * from urlmap u1,urlmap u2 where u1.url=u2.url and u1.oid!=u2.oid
I then got back two rows where the url was indeed the same and the
associated id
different. Why, would this ever occur?
-Aditya
