Further to above, since we have row-locking I'm hopeful that we cannot endup with a dirty read as explained in [1], with the current setup. Am I missing something?
[1] http://msdn.microsoft.com/en-us/library/ms173763.aspx Thanks, Senaka. On Mon, Aug 18, 2014 at 11:36 PM, Senaka Fernando <sen...@wso2.com> wrote: > Hi Sumedha, > > Alright but this SELECT is across different tables, and I also happened to > find this, [1]. So, unless you are in a transaction, if somebody updates > while you read, you can end up having messed up data right? > > [1] > http://stackoverflow.com/questions/1976686/is-there-a-difference-between-a-select-statement-inside-a-transaction-and-one-th > > Thanks, > Senaka. > > > On Mon, Aug 18, 2014 at 11:29 PM, Sumedha Rubasinghe <sume...@wso2.com> > wrote: > >> Senaka, >> I don't think doing a SELECT inside transaction here is required. We just >> read the committed data @ the time of reading. That's it. >> >> We never SELECT records for UPDATES (which is one occurrence where doing >> a SELECT inside transaction is useful). Another common usecase if to read >> uncommitted data. >> >> But we use neither of these scenarios. So I believe there is not need to >> read within transaction blocks. >> >> >> >> >> On Tue, Aug 19, 2014 at 3:49 AM, Senaka Fernando <sen...@wso2.com> >> wrote: >> >>> Hi Subash, >>> >>> Ah! forgot to discuss this today when we chatted. >>> >>> Subash the get() itself is a call spanning across multiple tables and >>> for the sake of a DB-neutral implementation we have kept the queries basic. >>> So this means we handle some joins etc at application-level. This is why it >>> has to be transactional. >>> >>> But, I was under the impression that the cache solves this issue >>> altogether with the get() doing nothing @ Embedded Registry level. Isn't >>> this the case or are you talking about first call slow-down? >>> >>> Thanks, >>> Senaka. >>> >>> >>> On Mon, Aug 18, 2014 at 6:36 AM, Subash Chaturanga <sub...@wso2.com> >>> wrote: >>> >>>> Hi Senaka et al, >>>> Is there any particular reason for doing $subject ? Because >>>> transactional db connection is always heavy and many applications doing the >>>> GET quite frequently. IMO we should not be doing a read in a transactional >>>> manner. Pls correct me if I am missing something. >>>> >>>> I am referring EmbeddedRegitry#get. >>>> >>>> -- >>>> Thanks >>>> /subash >>>> >>>> *Subash Chaturanga* >>>> Senior Software Engineer & Lead WSO2 Governance Registry >>>> Platform TG; WSO2 Inc. http://wso2.com >>>> Contact: >>>> email: sub...@wso2.com >>>> blog: http://subashsdm.blogspot.com/ >>>> twitter: @subash89 >>>> phone: +9477 2225922 >>>> Lean . Enterprise . Middleware >>>> >>> >>> >>> >>> -- >>> >>> >>> *[image: http://wso2.com] <http://wso2.com> Senaka Fernando* >>> Software Architect; WSO2 Inc.; http://wso2.com >>> >>> >>> >>> * Member; Apache Software Foundation; http://apache.org >>> <http://apache.org>E-mail: senaka AT wso2.com <http://wso2.com>**P: +1 >>> 408 754 7388 <%2B1%20408%20754%207388>; ext: 51736*; >>> >>> >>> *M: +44 782 741 1966 <%2B44%20782%20741%201966> Linked-In: >>> http://linkedin.com/in/senakafernando >>> <http://linkedin.com/in/senakafernando>* >>> Lean . Enterprise . Middleware >>> >> >> >> >> -- >> /sumedha >> m: +94 773017743 >> b : bit.ly/sumedha >> > > > > -- > > > *[image: http://wso2.com] <http://wso2.com> Senaka Fernando* > Software Architect; WSO2 Inc.; http://wso2.com > > > > * Member; Apache Software Foundation; http://apache.org > <http://apache.org>E-mail: senaka AT wso2.com <http://wso2.com>**P: +1 > 408 754 7388 <%2B1%20408%20754%207388>; ext: 51736*; > > > *M: +44 782 741 1966 <%2B44%20782%20741%201966> Linked-In: > http://linkedin.com/in/senakafernando > <http://linkedin.com/in/senakafernando>*Lean . Enterprise . Middleware > -- *[image: http://wso2.com] <http://wso2.com> Senaka Fernando* Software Architect; WSO2 Inc.; http://wso2.com * Member; Apache Software Foundation; http://apache.org <http://apache.org>E-mail: senaka AT wso2.com <http://wso2.com>**P: +1 408 754 7388 <%2B1%20408%20754%207388>; ext: 51736*; *M: +44 782 741 1966 <%2B44%20782%20741%201966> Linked-In: http://linkedin.com/in/senakafernando <http://linkedin.com/in/senakafernando>*Lean . Enterprise . Middleware
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