On Tue, Jun 17, 2014 at 12:16 PM, xbzhang <xbzh...@kingbase.com.cn> wrote: > > one resource owner per tuples, when error happens, only release resource owner belong to error tuple. > Why some memory structures should be in undefined state? Can you give some examples?
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There might be some LWlocks which might have been taken before error and you won't know which one to free. Another is that postgres uses memory context to allocate/free memory in most places, so there can be allocated memory which needs to be released, transaction/sub-transaction abort takes care of all such and many more similar things. With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com
