clogdesc.c File Reference

#include "postgres.h"
#include "access/clog.h"

Include dependency graph for clogdesc.c:

Go to the source code of this file.

Functions
void	clog_desc (StringInfo buf, XLogReaderState *record)
const char *	clog_identify (uint8 info)

Function Documentation

clog_desc()

void clog_desc	(	StringInfo	buf,
		XLogReaderState *	record
	)

Definition at line 21 of file clogdesc.c.

{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
 
    if (info == CLOG_ZEROPAGE)
    {
        int64       pageno;
 
        memcpy(&pageno, rec, sizeof(pageno));
        appendStringInfo(buf, "page %lld", (long long) pageno);
    }
    else if (info == CLOG_TRUNCATE)
    {
        xl_clog_truncate xlrec;
 
        memcpy(&xlrec, rec, sizeof(xl_clog_truncate));
        appendStringInfo(buf, "page %lld; oldestXact %u",
                         (long long) xlrec.pageno, xlrec.oldestXact);
    }
}

References appendStringInfo(), buf, CLOG_TRUNCATE, CLOG_ZEROPAGE, xl_clog_truncate::oldestXact, xl_clog_truncate::pageno, XLogRecGetData, XLogRecGetInfo, and XLR_INFO_MASK.

clog_identify()

const char* clog_identify

(

uint8

info

)

Definition at line 44 of file clogdesc.c.

{
    const char *id = NULL;
 
    switch (info & ~XLR_INFO_MASK)
    {
        case CLOG_ZEROPAGE:
            id = "ZEROPAGE";
            break;
        case CLOG_TRUNCATE:
            id = "TRUNCATE";
            break;
    }
 
    return id;
}

References CLOG_TRUNCATE, CLOG_ZEROPAGE, and XLR_INFO_MASK.