AW: MySQL Auto Increment Field
Barneyb, Railo only retrieves the result when you actually use a result attribute in the query. If you are not using it then it is not slower. On the other hand the result attribute must already contain the value after the cfquery is executed. This is due to the fact that when retrieving AutoInc numbers a different code needs to be executed, containing data that is only available at query execution time. So even if lazy loading would be superb to have when you have a result attribute, it is not possible to execute the necessary code to fill the GENERATEDKEY field of the result struct. PS: Your business card almost put me into trouble with my GF :-) Greetings from Switzerland Gert Franz Railo Technologies Professional Open Source skype: gert.franz g...@getrailo.com +41 76 5680 231 www.getrailo.com -Ursprüngliche Nachricht- Von: Barney Boisvert [mailto:bboisv...@gmail.com] Gesendet: Donnerstag, 1. Oktober 2009 07:36 An: cf-talk Betreff: Re: MySQL Auto Increment Field Just out of curiosity Sean, do you know if the value is lazy loaded, or do you have to pay the cost of retrieving the value on every query (or at least introspecting to determine whether a value is available) regardless? I know you're closest to Railo, but I'm interested in both (all three?) platforms if you've got the info. cheers, barneyb On Wed, Sep 30, 2009 at 10:19 PM, Sean Corfield seancorfi...@gmail.com wrote: On Tue, Sep 29, 2009 at 12:22 PM, Azadi Saryev az...@sabai-dee.com wrote: if you are on CF8, use RESULT attribute of cfquery tag and then get GENERATED_KEY from that result: cfquery name=myquery datasource=... result=qResult INSERT ... /cfquery cfset newID = qResult.GENERATED_KEY As an aside, the generated key is placed into a different element of the result struct for each different database in CF8 (why??!?!) but that is fixed in CF9 which also adds GENERATEDKEY for *all* DB types so you can write portable code (assuming you stick to standard SQL of course and not TSQL - sorry Robert, couldn't resist! :) Railo recently implemented this same feature (both adding the various DB-specific generated key elements as well as the generic GENERATEDKEY element). I don't know whether Open BlueDragon supports this feature yet. Anyone? -- Sean A Corfield -- (904) 302-SEAN Railo Technologies US -- http://getrailo.com/ An Architect's View -- http://corfield.org/ -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326792 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
The article did mention trouble coming from the database itself if ones insert caused a trigger to be fired. Then the @@identity could return the generated key from what ever the trigger created. Yes, and it does. Having had that unpleasant experience once, with an older application, convinced me to switch to using SCOPE_IDENTITY(). Granted, not everyone uses triggers, or ones that involve an identity column on another table, but better safe than sorry. -Leigh ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326786 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
On Tue, Sep 29, 2009 at 12:22 PM, Azadi Saryev az...@sabai-dee.com wrote: if you are on CF8, use RESULT attribute of cfquery tag and then get GENERATED_KEY from that result: cfquery name=myquery datasource=... result=qResult INSERT ... /cfquery cfset newID = qResult.GENERATED_KEY As an aside, the generated key is placed into a different element of the result struct for each different database in CF8 (why??!?!) but that is fixed in CF9 which also adds GENERATEDKEY for *all* DB types so you can write portable code (assuming you stick to standard SQL of course and not TSQL - sorry Robert, couldn't resist! :) Railo recently implemented this same feature (both adding the various DB-specific generated key elements as well as the generic GENERATEDKEY element). I don't know whether Open BlueDragon supports this feature yet. Anyone? -- Sean A Corfield -- (904) 302-SEAN Railo Technologies US -- http://getrailo.com/ An Architect's View -- http://corfield.org/ If you're not annoying somebody, you're not really alive. -- Margaret Atwood ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326789 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
Just out of curiosity Sean, do you know if the value is lazy loaded, or do you have to pay the cost of retrieving the value on every query (or at least introspecting to determine whether a value is available) regardless? I know you're closest to Railo, but I'm interested in both (all three?) platforms if you've got the info. cheers, barneyb On Wed, Sep 30, 2009 at 10:19 PM, Sean Corfield seancorfi...@gmail.com wrote: On Tue, Sep 29, 2009 at 12:22 PM, Azadi Saryev az...@sabai-dee.com wrote: if you are on CF8, use RESULT attribute of cfquery tag and then get GENERATED_KEY from that result: cfquery name=myquery datasource=... result=qResult INSERT ... /cfquery cfset newID = qResult.GENERATED_KEY As an aside, the generated key is placed into a different element of the result struct for each different database in CF8 (why??!?!) but that is fixed in CF9 which also adds GENERATEDKEY for *all* DB types so you can write portable code (assuming you stick to standard SQL of course and not TSQL - sorry Robert, couldn't resist! :) Railo recently implemented this same feature (both adding the various DB-specific generated key elements as well as the generic GENERATEDKEY element). I don't know whether Open BlueDragon supports this feature yet. Anyone? -- Sean A Corfield -- (904) 302-SEAN Railo Technologies US -- http://getrailo.com/ An Architect's View -- http://corfield.org/ -- Barney Boisvert bboisv...@gmail.com http://www.barneyb.com/ ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326791 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
MySQL Auto Increment Field
All, How do I get the ID value back in CF from MySQL after doing an insert with auto_inc data type in the table? Thanks for help Agha ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326747 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
if you are on CF8, use RESULT attribute of cfquery tag and then get GENERATED_KEY from that result: cfquery name=myquery datasource=... result=qResult INSERT ... /cfquery cfset newID = qResult.GENERATED_KEY Azadi Saryev Sabai-dee.com http://www.sabai-dee.com/ On 30/09/2009 03:16, Agha Mehdi wrote: All, How do I get the ID value back in CF from MySQL after doing an insert with auto_inc data type in the table? Thanks for help Agha ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326748 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: MySQL Auto Increment Field
select last_insert_id() as id http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id cheers, barneyb On Tue, Sep 29, 2009 at 12:16 PM, Agha Mehdi aghaime...@gmail.com wrote: All, How do I get the ID value back in CF from MySQL after doing an insert with auto_inc data type in the table? Thanks for help Agha ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326749 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
RE: MySQL Auto Increment Field
Nice Azadi, I didn't know you could do that. Will -Original Message- From: Azadi Saryev [mailto:az...@sabai-dee.com] Sent: 29 September 2009 20:23 To: cf-talk Subject: Re: MySQL Auto Increment Field if you are on CF8, use RESULT attribute of cfquery tag and then get GENERATED_KEY from that result: cfquery name=myquery datasource=... result=qResult INSERT ... /cfquery cfset newID = qResult.GENERATED_KEY Azadi Saryev Sabai-dee.com http://www.sabai-dee.com/ On 30/09/2009 03:16, Agha Mehdi wrote: All, How do I get the ID value back in CF from MySQL after doing an insert with auto_inc data type in the table? Thanks for help Agha ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326750 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
Thanks Azadi and Barney. Which approach is better in performance? I'm assuming result.generated_key? Thanks again for help Agha On Sep 29, 2009, at 12:20 PM, Barney Boisvert bboisv...@gmail.com wrote: select last_insert_id() as id http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id cheers, barneyb On Tue, Sep 29, 2009 at 12:16 PM, Agha Mehdi aghaime...@gmail.com wrote: All, How do I get the ID value back in CF from MySQL after doing an insert with auto_inc data type in the table? Thanks for help Agha ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326751 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: MySQL Auto Increment Field
You can also do this using SQL. Sure this works with MS SQL, not 100% sure
about mySQL but it's standard SQL, so it should work.
cfquery name=putData datasource=#dsn#
SET NOCOUNT ON
INSERT INTO my_table (my_field1, my_field2)
VALUES ('#trim(value_field1)#', ('#trim(value_field2)#')
SELECT @@Identity AS newId
SET NOCOUNT OFF ;
/cfquery
cfoutputThe Generated ID is: #putData.newId#/cfoutput
Robert B. Harrison
Director of Interactive Services
Austin Williams
125 Kennedy Drive, Suite 100
Hauppauge NY 11788
P : 631.231.6600 Ext. 119
F : 631.434.7022
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On 30/09/2009 03:16, Agha Mehdi wrote:
All,
How do I get the ID value back in CF from MySQL after doing an insert with
auto_inc data type in the table?
Thanks for help
Agha
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Re: MySQL Auto Increment Field
You can also do this using SQL. Sure this works with MS SQL, not 100% sure
about mySQL but it's standard SQL, so it should work.
cfquery name=putData datasource=#dsn#
SET NOCOUNT ON
INSERT INTO my_table (my_field1, my_field2)
VALUES ('#trim(value_field1)#', ('#trim(value_field2)#')
SELECT @@Identity AS newId
SET NOCOUNT OFF ;
/cfquery
cfoutputThe Generated ID is: #putData.newId#/cfoutput
The @@IDENTITY global variable is not standard SQL. It's specific to
T-SQL. So is SET NOCOUNT ON|OFF. Of the four SQL statements you've
listed, one is standard SQL.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
Fig Leaf Software provides the highest caliber vendor-authorized
instruction at our training centers in Washington DC, Atlanta,
Chicago, Baltimore, Northern Virginia, or on-site at your location.
Visit http://training.figleaf.com/ for
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Re: MySQL Auto Increment Field
Thanks Azadi and Barney. Which approach is better in performance? I'm assuming result.generated_key? I would assume that there wouldn't be a significant performance difference either way. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ Fig Leaf Software provides the highest caliber vendor-authorized instruction at our training centers in Washington DC, Atlanta, Chicago, Baltimore, Northern Virginia, or on-site at your location. Visit http://training.figleaf.com/ for more information! ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326754 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: MySQL Auto Increment Field
Yes. You're correct. My Bad. TSQL.
That's probably why I should just turn off email when I'm busy on something
else.
Robert B. Harrison
Director of Interactive Services
Austin Williams
125 Kennedy Drive, Suite 100
Hauppauge NY 11788
P : 631.231.6600 Ext. 119
F : 631.434.7022
http://www.austin-williams.com
Great advertising can't be either/or. It must be .
Plug in to our blog: AW Unplugged
http://www.austin-williams.com/unplugged
-Original Message-
From: Dave Watts [mailto:dwa...@figleaf.com]
Sent: Tuesday, September 29, 2009 4:00 PM
To: cf-talk
Subject: Re: MySQL Auto Increment Field
You can also do this using SQL. Sure this works with MS SQL, not 100% sure
about mySQL but it's standard SQL, so it should work.
cfquery name=putData datasource=#dsn#
SET NOCOUNT ON
INSERT INTO my_table (my_field1, my_field2)
VALUES ('#trim(value_field1)#', ('#trim(value_field2)#')
SELECT @@Identity AS newId
SET NOCOUNT OFF ;
/cfquery
cfoutputThe Generated ID is: #putData.newId#/cfoutput
The @@IDENTITY global variable is not standard SQL. It's specific to
T-SQL. So is SET NOCOUNT ON|OFF. Of the four SQL statements you've
listed, one is standard SQL.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
Fig Leaf Software provides the highest caliber vendor-authorized
instruction at our training centers in Washington DC, Atlanta,
Chicago, Baltimore, Northern Virginia, or on-site at your location.
Visit http://training.figleaf.com/ for
~|
Want to reach the ColdFusion community with something they want? Let them know
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Re: MySQL Auto Increment Field
And for those folks using MSSQL, please note that @@IDENTITY is
probably not what you want either. @@IDENTITY returns the last
identity produced by a connection to the database, regardless of the
table. So in some circumstances you can end up with an identity
returned that is not from the table you just inserted into. In most
cases you'll instead want to use SCOPE_IDENTITY() which returns the
identity produced by the current connection and current statement
combination.
For more, you can read up here: http://bit.ly/rhkvf
Cheers,
Judah
On Tue, Sep 29, 2009 at 12:59 PM, Dave Watts dwa...@figleaf.com wrote:
You can also do this using SQL. Sure this works with MS SQL, not 100% sure
about mySQL but it's standard SQL, so it should work.
cfquery name=putData datasource=#dsn#
SET NOCOUNT ON
INSERT INTO my_table (my_field1, my_field2)
VALUES ('#trim(value_field1)#', ('#trim(value_field2)#')
SELECT @@Identity AS newId
SET NOCOUNT OFF ;
/cfquery
cfoutputThe Generated ID is: #putData.newId#/cfoutput
The @@IDENTITY global variable is not standard SQL. It's specific to
T-SQL. So is SET NOCOUNT ON|OFF. Of the four SQL statements you've
listed, one is standard SQL.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
Fig Leaf Software provides the highest caliber vendor-authorized
instruction at our training centers in Washington DC, Atlanta,
Chicago, Baltimore, Northern Virginia, or on-site at your location.
Visit http://training.figleaf.com/ for
~|
Want to reach the ColdFusion community with something they want? Let them know
on the House of Fusion mailing lists
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RE: MySQL Auto Increment Field
Man. Now I'm glad I posted that. Just went through and changed all: SELECT @@Identity AS newId To SELECT SCOPE_IDENTITY() AS newId Looks like it worked. I've been using that statement for six or seven years. Never failed, but I could see where if it did I'd have had no idea what happened. Thanks for clearing that up. Robert B. Harrison Director of Interactive Services Austin Williams 125 Kennedy Drive, Suite 100 Hauppauge NY 11788 P : 631.231.6600 Ext. 119 F : 631.434.7022 http://www.austin-williams.com Great advertising can't be either/or. It must be . Plug in to our blog: AW Unplugged http://www.austin-williams.com/unplugged __ Information from ESET Smart Security, version of virus signature database 4468 (20090929) __ The message was checked by ESET Smart Security. http://www.eset.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326760 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: MySQL Auto Increment Field
I had to go and make that very same change a couple years ago, so I can totally understand missing that. Glad to be of help. Cheers, Judah On Tue, Sep 29, 2009 at 1:29 PM, Robert Harrison rob...@austin-williams.com wrote: Man. Now I'm glad I posted that. Just went through and changed all: SELECT @@Identity AS newId To SELECT SCOPE_IDENTITY() AS newId Looks like it worked. I've been using that statement for six or seven years. Never failed, but I could see where if it did I'd have had no idea what happened. Thanks for clearing that up. Robert B. Harrison Director of Interactive Services Austin Williams 125 Kennedy Drive, Suite 100 Hauppauge NY 11788 P : 631.231.6600 Ext. 119 F : 631.434.7022 http://www.austin-williams.com Great advertising can't be either/or. It must be . Plug in to our blog: AW Unplugged http://www.austin-williams.com/unplugged __ Information from ESET Smart Security, version of virus signature database 4468 (20090929) __ The message was checked by ESET Smart Security. http://www.eset.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326762 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: MySQL Auto Increment Field
While I agree that SCOPE_IDENTITY is the preferred syntax, it's
unlikely that you'll encounter a problem with @@IDENTITY. CF will use
a single connection for all queries within a page that use the same
datasource, username and password, and the queries will be executed
sequentially unless wrapped in CFTHREAD. So to run into this problem,
you'd have to have a single query doing multiple inserts in a nested
transaction or stored procedure call.
In summary, I would write new T-SQL with SCOPE_IDENTITY, but I
wouldn't bother rewriting existing code.
Dave Watts, CTO, Fig Leaf Software
On 2009-09-29, Judah McAuley ju...@wiredotter.com wrote:
And for those folks using MSSQL, please note that @@IDENTITY is
probably not what you want either. @@IDENTITY returns the last
identity produced by a connection to the database, regardless of the
table. So in some circumstances you can end up with an identity
returned that is not from the table you just inserted into. In most
cases you'll instead want to use SCOPE_IDENTITY() which returns the
identity produced by the current connection and current statement
combination.
For more, you can read up here: http://bit.ly/rhkvf
Cheers,
Judah
On Tue, Sep 29, 2009 at 12:59 PM, Dave Watts dwa...@figleaf.com wrote:
You can also do this using SQL. Sure this works with MS SQL, not 100%
sure
about mySQL but it's standard SQL, so it should work.
cfquery name=putData datasource=#dsn#
SET NOCOUNT ON
INSERT INTO my_table (my_field1, my_field2)
VALUES ('#trim(value_field1)#', ('#trim(value_field2)#')
SELECT @@Identity AS newId
SET NOCOUNT OFF ;
/cfquery
cfoutputThe Generated ID is: #putData.newId#/cfoutput
The @@IDENTITY global variable is not standard SQL. It's specific to
T-SQL. So is SET NOCOUNT ON|OFF. Of the four SQL statements you've
listed, one is standard SQL.
Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.com/
Fig Leaf Software provides the highest caliber vendor-authorized
instruction at our training centers in Washington DC, Atlanta,
Chicago, Baltimore, Northern Virginia, or on-site at your location.
Visit http://training.figleaf.com/ for
~|
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Re: MySQL Auto Increment Field
Thank you all for the great inputs. On Tue, Sep 29, 2009 at 1:48 PM, Judah McAuley ju...@wiredotter.com wrote: I had to go and make that very same change a couple years ago, so I can totally understand missing that. Glad to be of help. Cheers, Judah On Tue, Sep 29, 2009 at 1:29 PM, Robert Harrison rob...@austin-williams.com wrote: Man. Now I'm glad I posted that. Just went through and changed all: SELECT @@Identity AS newId To SELECT SCOPE_IDENTITY() AS newId Looks like it worked. I've been using that statement for six or seven years. Never failed, but I could see where if it did I'd have had no idea what happened. Thanks for clearing that up. Robert B. Harrison Director of Interactive Services Austin Williams 125 Kennedy Drive, Suite 100 Hauppauge NY 11788 P : 631.231.6600 Ext. 119 F : 631.434.7022 http://www.austin-williams.com Great advertising can't be either/or. It must be . Plug in to our blog: AW Unplugged http://www.austin-williams.com/unplugged __ Information from ESET Smart Security, version of virus signature database 4468 (20090929) __ The message was checked by ESET Smart Security. http://www.eset.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326764 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: MySQL Auto Increment Field
Dave Watts wrote: In summary, I would write new T-SQL with SCOPE_IDENTITY, but I wouldn't bother rewriting existing code. The article did mention trouble coming from the database itself if ones insert caused a trigger to be fired. Then the @@identity could return the generated key from what ever the trigger created. I would presume ColdFusion would provide no protection form this event. ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326765 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
