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Fix the display of lock information for specktoken.

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A transaction id is now displayed in the transactionid field and
speculative insertion token is displayed in the objid field.

Author: Sawada Masahiko
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/CAD21AoCEKxZztULP1CDm45aSNNR1QO-Bh1q6LMTspQ78PBuJrw@mail.gmail.com
This commit is contained in:
Amit Kapila 2023-01-10 08:53:12 +05:30
parent bd8d453e9b
commit f745739697
2 changed files with 18 additions and 0 deletions
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6
doc/src/sgml/system-views.sgml
View File

@ -1579,6 +1579,12 @@
permanent transaction ID of the current holder of that row lock. permanent transaction ID of the current holder of that row lock.
</para> </para>
<para>
A specualtive insertion lock consists of a transaction ID and a speculative
insertion token. The speculative insertion token is displayed in the
<structfield>objid</structfield> column.
</para>
<para> <para>
Advisory locks can be acquired on keys consisting of either a single Advisory locks can be acquired on keys consisting of either a single
<type>bigint</type> value or two integer values. <type>bigint</type> value or two integer values.

12
src/backend/utils/adt/lockfuncs.c
View File

@ -313,6 +313,18 @@ pg_lock_status(PG_FUNCTION_ARGS)
nulls[8] = true; nulls[8] = true;
nulls[9] = true; nulls[9] = true;
break; break;
case LOCKTAG_SPECULATIVE_TOKEN:
values[6] =
TransactionIdGetDatum(instance->locktag.locktag_field1);
values[8] = ObjectIdGetDatum(instance->locktag.locktag_field2);
nulls[1] = true;
nulls[2] = true;
nulls[3] = true;
nulls[4] = true;
nulls[5] = true;
nulls[7] = true;
nulls[9] = true;
break;
case LOCKTAG_APPLY_TRANSACTION: case LOCKTAG_APPLY_TRANSACTION:
values[1] = ObjectIdGetDatum(instance->locktag.locktag_field1); values[1] = ObjectIdGetDatum(instance->locktag.locktag_field1);
values[8] = ObjectIdGetDatum(instance->locktag.locktag_field2); values[8] = ObjectIdGetDatum(instance->locktag.locktag_field2);