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Add rmgr callback to name xlog record types for display purposes.

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This is primarily useful for the upcoming pg_xlogdump --stats feature,
but also allows to remove some duplicated code in the rmgr_desc
routines.

Due to the separation and harmonization, the output of dipsplayed
records changes somewhat. But since this isn't enduser oriented
content that's ok.

It's potentially desirable to further change pg_xlogdump's display of
records. It previously wasn't possible to show the record type
separately from the description forcing it to be in the last
column. But that's better done in a separate commit.

Author: Abhijit Menon-Sen, slightly editorialized by me
Reviewed-By: Álvaro Herrera, Andres Freund, and Heikki Linnakangas
Discussion: 20140604104716.GA3989@toroid.org
This commit is contained in:
Andres Freund
2014-09-19 15:17:12 +02:00
parent 7e3f728353
commit 728f152e07
40 changed files with 593 additions and 239 deletions
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31
src/backend/access/rmgrdesc/clogdesc.c
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@@ -23,20 +23,29 @@ clog_desc(StringInfo buf, XLogRecord *record)
char *rec = XLogRecGetData(record);
uint8 info = record->xl_info & ~XLR_INFO_MASK;
if (info == CLOG_ZEROPAGE)
if (info == CLOG_ZEROPAGE || info == CLOG_TRUNCATE)
{
int pageno;
memcpy(&pageno, rec, sizeof(int));
appendStringInfo(buf, "zeropage: %d", pageno);
appendStringInfo(buf, "%d", pageno);
}
else if (info == CLOG_TRUNCATE)
{
int pageno;
memcpy(&pageno, rec, sizeof(int));
appendStringInfo(buf, "truncate before: %d", pageno);
}
else
appendStringInfoString(buf, "UNKNOWN");
}
const char *
clog_identify(uint8 info)
{
const char *id = NULL;
switch (info)
{
case CLOG_ZEROPAGE:
id = "ZEROPAGE";
break;
case CLOG_TRUNCATE:
id = "TRUNCATE";
break;
}
return id;
}