On Wed, Dec 1, 2021 at 10:58 PM Andy Fan wrote:
> Thanks! I clearly understand what's wrong in my previous knowledge.
Cool, glad it helped.
--
Robert Haas
EDB: http://www.enterprisedb.com
> If the relation is open,
> the relcache entry can't be destroyed altogether, but it can be
> rebuilt: see RelationClearRelation().
Thanks! This is a new amazing knowledge for me!
> They are in fact stable in a certain sense - if we have the relation open
we hold a reference count on it, and
On Tue, Nov 30, 2021 at 7:50 PM Andy Fan wrote:
> I think you misunderstand me, I argued with the answer because after I got
> the
> answer and I rethink my problem, I found my question description is not
> accurate
> enough, so I improved the question and willing discussion again. My
> excep
On Wed, Dec 1, 2021 at 3:33 AM Robert Haas wrote:
> On Tue, Nov 30, 2021 at 4:47 AM Andy Fan wrote:
> >> my exception should be that the relcache should not be invalidated
> _after the first relation open_
> >> in the executor (not the beginning of executorRun)。
> >
> > s/exception/expectation.
On Tue, Nov 30, 2021 at 4:47 AM Andy Fan wrote:
>> my exception should be that the relcache should not be invalidated _after
>> the first relation open_
>> in the executor (not the beginning of executorRun)。
>
> s/exception/expectation.
>
> To be more accurate, my expectation is for a single sql
Thanks for everyone's insight so far!
my exception should be that the relcache should not be invalidated _after
> the first relation open_
> in the executor (not the beginning of executorRun)。
>
>
s/exception/expectation.
To be more accurate, my expectation is for a single sql statement, after
On Tue, Nov 30, 2021 at 12:12 PM Andy Fan wrote:
>>
>>
>> You will see there are many pointers also in
>> RelationData but we ensure before we access them they are initialized,
>
>
> The initialized values are not much helpful in the cases I provided here.
>
> What do you think about this questio
>
>
> You will see there are many pointers also in
> RelationData but we ensure before we access them they are initialized,
>
The initialized values are not much helpful in the cases I provided here.
What do you think about this question?
2. _If_ the relation can be reset after we open it durin
On Tue, Nov 30, 2021 at 6:44 AM Andy Fan wrote:
>>
>>
>>>
>>> Why do you think this ought to be in the relcache, and not in the
>>> executor's rangetable-associated data structures?
>
>
> I re-think about this, I guess I didn't mention something clear enough.
> That's true that I bound my bala s
>
>
>
>> Why do you think this ought to be in the relcache, and not in the
>> executor's rangetable-associated data structures?
>>
>
I re-think about this, I guess I didn't mention something clear enough.
That's true that I bound my bala struct to Relation struct, and the memory
relation used is
On Mon, Nov 29, 2021 at 10:56 PM Robert Haas wrote:
> On Mon, Nov 29, 2021 at 2:10 AM Andy Fan wrote:
> > 1. During the ExecutorRun & ExecutorEnd, the relcache will never by
> invalidated, if not
> > the old relation->balabala will be lost. I assume this is correct since
> I didn't see any pl
On Mon, Nov 29, 2021 at 10:33 PM Tom Lane wrote:
> Andy Fan writes:
> > During my recent work, I need some new stuff attached to Relation.
> Rather
> > than adding
> > some new data structures, I added it to Relation directly. Like
> > relation->balabala. Then
> > I initialize it during Exec
On Mon, Nov 29, 2021 at 2:10 AM Andy Fan wrote:
> 1. During the ExecutorRun & ExecutorEnd, the relcache will never by
> invalidated, if not
> the old relation->balabala will be lost. I assume this is correct since I
> didn't see any places
> where we handle such changes in Executor code.
It'
Andy Fan writes:
> During my recent work, I need some new stuff attached to Relation. Rather
> than adding
> some new data structures, I added it to Relation directly. Like
> relation->balabala. Then
> I initialize it during ExecutorRun, like table_tuple_insert.. and
> destroy it at Executo
Hi,
During my recent work, I need some new stuff attached to Relation. Rather
than adding
some new data structures, I added it to Relation directly. Like
relation->balabala. Then
I initialize it during ExecutorRun, like table_tuple_insert.. and
destroy it at ExecutorEnd.
The above solution
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