Re: Basic SQL question Update statement
bruehlicke bruehli...@gmail.com writes: I have a trigger something like . UPDATE X SET A=(SELECT . ) Now, if the embedded SELECT statement returns no rows I would NOT like to change the value from A to bank/null but let it keep the value it currently has. Any suggestions for a one liner which fits into a create trigger statement I think this should do the trick: UPDATE X SET A=COALESCE((SELECT ..), A) -- Knut Anders
Pooling
Hi, Just to be sure - Derby does not directly support connection pooling, correct? Rather, One must use a third party pool such as Apache DBCP Could you please confirm my understanding? Thanks, chris
SQLException: Syntax error: Encountered EOF at line 1, column 19.
I am using Eclipse 3.5.0 with Derby 10.5.3.0 (not the Derby Plugin). I created an SQLJ stored procedure and stored it. When I try to execute it I get SQLException: Syntax error: Encountered EOF at line 1, column 19. That is the only error information I get. How can I get a listing of what SQL thinks the procedure looks like up to the point where the error occurs? -- View this message in context: http://www.nabble.com/SQLException%3A-Syntax-error%3A-Encountered-%22%3CEOF%3E%22-at-line-1%2C-column-19.-tp25638168p25638168.html Sent from the Apache Derby Users mailing list archive at Nabble.com.
Re: Basic SQL question Update statement
Tusind takk. Virker perfekt. On Sun, Sep 27, 2009 at 1:22 PM, Knut Anders Hatlen knut.hat...@sun.com wrote: bruehlicke bruehli...@gmail.com writes: I have a trigger something like . UPDATE X SET A=(SELECT . ) Now, if the embedded SELECT statement returns no rows I would NOT like to change the value from A to bank/null but let it keep the value it currently has. Any suggestions for a one liner which fits into a create trigger statement I think this should do the trick: UPDATE X SET A=COALESCE((SELECT ..), A) -- Knut Anders
Re: Pooling
Yes, Derby does not provide connection pool, pick your favourite (I can confirm c3p0 works very well for me). Peter On Sun, Sep 27, 2009 at 11:56 PM, Christopher Giblin c...@zurich.ibm.comwrote: Hi, Just to be sure - Derby does not directly support connection pooling, correct? Rather, One must use a third party pool such as Apache DBCP Could you please confirm my understanding? Thanks, chris
Re: Pooling
Peter Ondruška wrote: Yes, Derby does not provide connection pool, pick your favourite (I can confirm c3p0 works very well for me). Peter We also use c3p0 with embedded derby, but it's mainly just our default configuration so if you switch our app over to a network based database you can take advantage of the pooling. When using embedded derby is there advantage (or disadvantage!) to using a DB connection pool? Cheers, Matt
