Am 01.07.2020 um 12:54 schrieb Michael Van Canneyt via lazarus:
On Wed, 1 Jul 2020, Luca Olivetti via lazarus wrote:
El 1/7/20 a les 0:40, R.Smith via lazarus ha escrit:
On 2020/06/30 22:52, Special via lazarus wrote:
Hi, Ryan,
I followed your advice and removed XTransaction and all references
to it from TestButtonClick. But now I get an exception with the
message "Transaction not set". Any hint?
Regards -- Joe
I'm sorry, the previous problem was SQLite-related, which I'm
initimately familiar with, but this one seems to be a Lazarus DB
component requirement which I'm not so much familiar with, but
probably has an easy solution someone here might know about.
The question becomes: How to execute a query, without a transaction
being set, using SQLdb in Lazarus?
I use zeos instead of sqldb. Most probably it's my fault and it could
be solved by doing what Michael said (use stoUseImplicit), but when I
tried to use sqldb with sqlite, as long as I kept the dataset open
(to show the data in a dbgrid) the table was locked and couldn't be
modified by a different thread/process.
The stoUseImplicit is one way to solve this.
An alternative was to disable the need to keep an active transaction
using
TSQLQuery.Options : add sqoKeepOpenOnCommit.
see
https://www.freepascal.org/docs-html/current/fcl/sqldb/tsqlqueryoptions.html
Then you can do
Dataset.open;
MyTransaction.Commit;
And the table will not be locked.
Michael.
Hi, Ryan, Luca, Michael and all others,
to Transaction.Options I added 'stoUseImplicit'. Now I can get and set
'PRAGMA locking_mode' and 'PRAGMA synchronize'.
Thank you. Regards -- Joe
--
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