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Extract code to describe recovery stop reason to a function.

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StartupXLOG() is very long, this makes it a little bit more readable.

Reviewed-by: Andres Freund
Discussion: https://www.postgresql.org/message-id/b3b71061-4919-e882-4857-27e370ab134a%40iki.fi
This commit is contained in:
Heikki Linnakangas 2021-07-31 09:49:30 +03:00
parent 6b16532811
commit 4fe8dcdff3
1 changed files with 39 additions and 28 deletions
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67
src/backend/access/transam/xlog.c
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@ -901,6 +901,7 @@ static void validateRecoveryParameters(void);
static void exitArchiveRecovery(TimeLineID endTLI, XLogRecPtr endOfLog); static void exitArchiveRecovery(TimeLineID endTLI, XLogRecPtr endOfLog);
static bool recoveryStopsBefore(XLogReaderState *record); static bool recoveryStopsBefore(XLogReaderState *record);
static bool recoveryStopsAfter(XLogReaderState *record); static bool recoveryStopsAfter(XLogReaderState *record);
static char *getRecoveryStopReason(void);
static void ConfirmRecoveryPaused(void); static void ConfirmRecoveryPaused(void);
static void recoveryPausesHere(bool endOfRecovery); static void recoveryPausesHere(bool endOfRecovery);
static bool recoveryApplyDelay(XLogReaderState *record); static bool recoveryApplyDelay(XLogReaderState *record);
@ -6059,6 +6060,42 @@ recoveryStopsAfter(XLogReaderState *record)
return false; return false;
} }
/*
* Create a comment for the history file to explain why and where
* timeline changed.
*/
static char *
getRecoveryStopReason(void)
{
char reason[200];
if (recoveryTarget == RECOVERY_TARGET_XID)
snprintf(reason, sizeof(reason),
"%s transaction %u",
recoveryStopAfter ? "after" : "before",
recoveryStopXid);
else if (recoveryTarget == RECOVERY_TARGET_TIME)
snprintf(reason, sizeof(reason),
"%s %s\n",
recoveryStopAfter ? "after" : "before",
timestamptz_to_str(recoveryStopTime));
else if (recoveryTarget == RECOVERY_TARGET_LSN)
snprintf(reason, sizeof(reason),
"%s LSN %X/%X\n",
recoveryStopAfter ? "after" : "before",
LSN_FORMAT_ARGS(recoveryStopLSN));
else if (recoveryTarget == RECOVERY_TARGET_NAME)
snprintf(reason, sizeof(reason),
"at restore point \"%s\"",
recoveryStopName);
else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
snprintf(reason, sizeof(reason), "reached consistency");
else
snprintf(reason, sizeof(reason), "no recovery target specified");
return pstrdup(reason);
}
/* /*
* Wait until shared recoveryPauseState is set to RECOVERY_NOT_PAUSED. * Wait until shared recoveryPauseState is set to RECOVERY_NOT_PAUSED.
* *
@ -7756,7 +7793,7 @@ StartupXLOG(void)
PrevTimeLineID = ThisTimeLineID; PrevTimeLineID = ThisTimeLineID;
if (ArchiveRecoveryRequested) if (ArchiveRecoveryRequested)
{ {
char reason[200]; char *reason;
char recoveryPath[MAXPGPATH]; char recoveryPath[MAXPGPATH];
Assert(InArchiveRecovery); Assert(InArchiveRecovery);
@ -7765,33 +7802,7 @@ StartupXLOG(void)
ereport(LOG, ereport(LOG,
(errmsg("selected new timeline ID: %u", ThisTimeLineID))); (errmsg("selected new timeline ID: %u", ThisTimeLineID)));
/* reason = getRecoveryStopReason();
* Create a comment for the history file to explain why and where
* timeline changed.
*/
if (recoveryTarget == RECOVERY_TARGET_XID)
snprintf(reason, sizeof(reason),
"%s transaction %u",
recoveryStopAfter ? "after" : "before",
recoveryStopXid);
else if (recoveryTarget == RECOVERY_TARGET_TIME)
snprintf(reason, sizeof(reason),
"%s %s\n",
recoveryStopAfter ? "after" : "before",
timestamptz_to_str(recoveryStopTime));
else if (recoveryTarget == RECOVERY_TARGET_LSN)
snprintf(reason, sizeof(reason),
"%s LSN %X/%X\n",
recoveryStopAfter ? "after" : "before",
LSN_FORMAT_ARGS(recoveryStopLSN));
else if (recoveryTarget == RECOVERY_TARGET_NAME)
snprintf(reason, sizeof(reason),
"at restore point \"%s\"",
recoveryStopName);
else if (recoveryTarget == RECOVERY_TARGET_IMMEDIATE)
snprintf(reason, sizeof(reason), "reached consistency");
else
snprintf(reason, sizeof(reason), "no recovery target specified");
/* /*
* We are now done reading the old WAL. Turn off archive fetching if * We are now done reading the old WAL. Turn off archive fetching if