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Remove unused ParallelWorkerInfo.pid field 

The pid was originally used in error context of messages propagated
from parallel workers, but commit 292794f82b removed that. If the need
arises in the future, you can also get the pid with
"shm_mq_get_sender(pcxt->worker[i].error_mqh)->pid".
This commit is contained in:
Heikki Linnakangas 2024-03-04 12:56:02 +02:00
parent 8545b28679
commit 0dd094c4a0
2 changed files with 0 additions and 24 deletions
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23
src/backend/access/transam/parallel.c
View File

@ -1131,16 +1131,6 @@ HandleParallelMessage(ParallelContext *pcxt, int i, StringInfo msg)
switch (msgtype)
{
case PqMsg_BackendKeyData:
{
int32 pid = pq_getmsgint(msg, 4);
(void) pq_getmsgint(msg, 4); /* discard cancel key */
(void) pq_getmsgend(msg);
pcxt->worker[i].pid = pid;
break;
}
case PqMsg_ErrorResponse:
case PqMsg_NoticeResponse:
{
@ -1304,7 +1294,6 @@ ParallelWorkerMain(Datum main_arg)
char *relmapperspace;
char *uncommittedenumsspace;
char *clientconninfospace;
StringInfoData msgbuf;
char *session_dsm_handle_space;
Snapshot tsnapshot;
Snapshot asnapshot;
@ -1369,18 +1358,6 @@ ParallelWorkerMain(Datum main_arg)
pq_set_parallel_leader(fps->parallel_leader_pid,
fps->parallel_leader_proc_number);
/*
* Send a BackendKeyData message to the process that initiated parallelism
* so that it has access to our PID before it receives any other messages
* from us. Our cancel key is sent, too, since that's the way the
* protocol message is defined, but it won't actually be used for anything
* in this case.
*/
pq_beginmessage(&msgbuf, PqMsg_BackendKeyData);
pq_sendint32(&msgbuf, (int32) MyProcPid);
pq_sendint32(&msgbuf, (int32) MyCancelKey);
pq_endmessage(&msgbuf);
/*
* Hooray! Primary initialization is complete. Now, we need to set up our
* backend-local state to match the original backend.

1
src/include/access/parallel.h
View File

@ -26,7 +26,6 @@ typedef struct ParallelWorkerInfo
{
BackgroundWorkerHandle *bgwhandle;
shm_mq_handle *error_mqh;
int32 pid;
} ParallelWorkerInfo;
typedef struct ParallelContext