Re: [BUGS] [BUG] pg9.4.10 Logical decoding did not get the correct oldtuplelen

On Tue, Dec 27, 2016 at 12:30 PM, anderson <anderson2013@qq.com> wrote:
> I found a postgresql 9.4.10 Logical decoding problem
> heapam.c:6976 xlog store incorrect oldtuplen when tuplelen is greater than
> the value field of uint16.
>
> a uint32 variable is assigned to uint16
>
> The structure that holds the oldkey length is:
> typedef struct xl_heap_header_len
> {
> uint16 t_len;
> xl_heap_header header;
> } xl_heap_header_len;
>
> The problem will lead to logic decoding failure when oldtuplene > 65535 and
> relreplident = FULL.
> The table that triggers the problem is usually relreplident = FULL.

Do you have a test case able to reproduce the problem?
-- 
Michael


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