Re: Facing a problem with SPI
От | Gurjeet Singh |
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Тема | Re: Facing a problem with SPI |
Дата | |
Msg-id | 65937bea0612040710g5bf8e718rac2acb385eab9cfb@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Facing a problem with SPI ("Gurjeet Singh" <singh.gurjeet@gmail.com>) |
Ответы |
Re: Facing a problem with SPI
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Список | pgsql-hackers |
<span style="font-family: courier new,monospace;">Another question.<br /><br />There are two global variables:<br /><br />CurrentResourceOwner(CRO) and CurrentTransactionState (CTS). CTS has a member curTransactionOwner(cTO). Now the questionis: <br /><br />is the following condition always supposed to be true?<br /><br />CurrentResourceOwner==CurrentTransactionState->curTransactionOwner<br/><br /> While in executor, CRO->name is"Portal". Then I do the BeginInternalSubTransaction() (BIST()); it pushes the current (sub)transaction on a stack and andalong with it, it sets the CTS as it's parent. CTS->cTO->name is "TopTransaction". And a new resource-owner is assignedto the new SubTransaction by AtSubStart_ResourceOwner(). <br /><br /> After the adviser is done with it's work,it calls RollbackAndReleaseCurrentSubTransaction() (RARCST()), which restores the global CRO to the previously pushedSubTransaction's parent; this is "TopTransaction". Now, we have lost record of which was the ResourceOwner before BIST()and erroneously restored "TopTransaction" to be the CRO. This is causing some diffcult to track ERROR conditions. <br/><br /> So, is the above mentioned condition supposed to hold always? (I am assuming not). If not, then we shouldremember the CurrentResourceOwner across BIST() and RARCST() calls!<br /><br /> Sorry to be pestering you guys withseemingly trivial stuff, but you would also agree that it becomes very difficult to understand the code when there areso many globals and the relationship between them is not very clear. <br /><br />Regards,<br /></span><span style="font-family:courier new,monospace;"><br style="font-family: courier new,monospace;" /></span><span style="font-family:courier new,monospace;">-- </span><br style="font-family: courier new,monospace;" /><span style="font-family:courier new,monospace;">gurjeet[.singh]@EnterpriseDB.com</span><br style="font-family: courier new,monospace;"/><span style="font-family: courier new,monospace;">singh.gurjeet@{ gmail | hotmail | yahoo }.com </span>
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