106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* mxactdesc.c
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* rmgr descriptor routines for access/transam/multixact.c
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*
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* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/backend/access/rmgrdesc/mxactdesc.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/multixact.h"
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static void
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out_member(StringInfo buf, MultiXactMember *member)
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{
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appendStringInfo(buf, "%u ", member->xid);
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switch (member->status)
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{
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case MultiXactStatusForKeyShare:
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appendStringInfoString(buf, "(keysh) ");
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break;
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case MultiXactStatusForShare:
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appendStringInfoString(buf, "(sh) ");
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break;
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case MultiXactStatusForNoKeyUpdate:
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appendStringInfoString(buf, "(fornokeyupd) ");
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break;
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case MultiXactStatusForUpdate:
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appendStringInfoString(buf, "(forupd) ");
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break;
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case MultiXactStatusNoKeyUpdate:
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appendStringInfoString(buf, "(nokeyupd) ");
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break;
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case MultiXactStatusUpdate:
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appendStringInfoString(buf, "(upd) ");
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break;
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default:
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appendStringInfoString(buf, "(unk) ");
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break;
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}
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}
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void
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multixact_desc(StringInfo buf, XLogReaderState *record)
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{
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char *rec = XLogRecGetData(record);
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uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
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if (info == XLOG_MULTIXACT_ZERO_OFF_PAGE ||
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info == XLOG_MULTIXACT_ZERO_MEM_PAGE)
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{
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int64 pageno;
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memcpy(&pageno, rec, sizeof(pageno));
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appendStringInfo(buf, "%lld", (long long) pageno);
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}
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else if (info == XLOG_MULTIXACT_CREATE_ID)
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{
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xl_multixact_create *xlrec = (xl_multixact_create *) rec;
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int i;
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appendStringInfo(buf, "%u offset %u nmembers %d: ", xlrec->mid,
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xlrec->moff, xlrec->nmembers);
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for (i = 0; i < xlrec->nmembers; i++)
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out_member(buf, &xlrec->members[i]);
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}
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else if (info == XLOG_MULTIXACT_TRUNCATE_ID)
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{
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xl_multixact_truncate *xlrec = (xl_multixact_truncate *) rec;
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appendStringInfo(buf, "offsets [%u, %u), members [%u, %u)",
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xlrec->startTruncOff, xlrec->endTruncOff,
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xlrec->startTruncMemb, xlrec->endTruncMemb);
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}
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}
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const char *
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multixact_identify(uint8 info)
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{
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const char *id = NULL;
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switch (info & ~XLR_INFO_MASK)
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{
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case XLOG_MULTIXACT_ZERO_OFF_PAGE:
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id = "ZERO_OFF_PAGE";
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break;
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case XLOG_MULTIXACT_ZERO_MEM_PAGE:
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id = "ZERO_MEM_PAGE";
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break;
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case XLOG_MULTIXACT_CREATE_ID:
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id = "CREATE_ID";
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break;
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case XLOG_MULTIXACT_TRUNCATE_ID:
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id = "TRUNCATE_ID";
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break;
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}
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return id;
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}
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