Travis Whitton wrote:
Hi everybody,
I have two tables of the following structure:
Table "keywords"
column | type
---------------------
id | integer
keyword | varchar(255)
and
Table "badwords"
column | type
----------------------
badword | varchar(255)
I need to delete all the rows from the keywords table where badword
partially matches the keyword field. I know I can do an exact match
with a sub-select, but I'm not sure how to structure a wildcard match
/ like clause with a sub-select. Also, is that the best way to do it,
or should I be looking into full-text? I have roughly 10 million
keywords and 1 million badwords.
Thanks,
Travis
Hmm... Maybe (this is untested):
DELETE FROM keywords
USING badwords
WHERE keyword ILIKE ANY (SELECT '%' || badword || '%'
FROM badwords)
--
erik jones <[EMAIL PROTECTED]>
software development
emma(r)
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
