Andrew Dunstan wrote:
Jonathan Scher wrote:
Hello,
I'd like to work on TODO item:
> Add REPLACE or UPSERT command that does UPDATE, or on failure, INSERT
could you please tell me if I'm going in the right way?
There are some different syntaxes possible, but MySQL has an
interesting one here:
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html
INSERT INTO table (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=c+1;
This allow to make an insert, and if the key is already there to
modify the value depending on the current one.
May this could be generalized to a generic "<stmt> on <error> do <stmt>"?
You could then write
"update table set c=c+1 on not_found do insert into table (a,b,c) values
(1,2,3)"
Just an idea I just had...
greetings, Florian Pflug
---------------------------(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
