Re: Truncate in synchronous logical replication failed

On Fri, 16 Apr 2021 at 17:19, osumi(dot)takamichi(at)fujitsu(dot)com <osumi(dot)takamichi(at)fujitsu(dot)com> wrote:
> Hi
>
>
> On Friday, April 16, 2021 5:50 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>> On Fri, Apr 16, 2021 at 12:56 PM osumi(dot)takamichi(at)fujitsu(dot)com
>> <osumi(dot)takamichi(at)fujitsu(dot)com> wrote:
>> >
>> > > Thanks for your reminder. It might be a way to solve this problem.
>> > Yeah. I've made the 1st patch for this issue.
>> >
>> > In my env, with the patch
>> > the TRUNCATE in synchronous logical replication doesn't hang.
>> >
>>
>> Few initial comments:
>> =====================
>> 1.
>> + relreplindex = relation->rd_replidindex;
>> +
>> + /*
>> + * build attributes to idindexattrs.
>> + */
>> + idindexattrs = NULL;
>> + foreach(l, indexoidlist)
>> + {
>> + Oid indexOid = lfirst_oid(l);
>> + Relation indexDesc;
>> + int i;
>> + bool isIDKey; /* replica identity index */
>> +
>> + indexDesc = RelationIdGetRelation(indexOid);
>>
>> When you have oid of replica identity index (relreplindex) then what is the
>> need to traverse all the indexes?
> Ok. No need to traverse all the indexes. Will fix this part.
>
>> 2.
>> It is better to name the function as RelationGet...
> You are right. I'll modify this in my next version.
>

I took the liberty to address review comments and provide a v2 patch on top of
your's v1 patch, also merge the test case.

Sorry for attaching.

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Regrads,
Japin Li.
ChengDu WenWu Information Technology Co.,Ltd.