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/*-------------------------------------------------------------------------
*
* gindesc.c
* rmgr descriptor routines for access/transam/gin/ginxlog.c
*
* Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/gindesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/ginxlog.h"
#include "access/xlogutils.h"
#include "lib/stringinfo.h"
#include "storage/relfilenode.h"
static void
desc_recompress_leaf(StringInfo buf, ginxlogRecompressDataLeaf *insertData)
{
int i;
char *walbuf = ((char *) insertData) + sizeof(ginxlogRecompressDataLeaf);
appendStringInfo(buf, " %d segments:", (int) insertData->nactions);
for (i = 0; i < insertData->nactions; i++)
{
uint8 a_segno = *((uint8 *) (walbuf++));
uint8 a_action = *((uint8 *) (walbuf++));
uint16 nitems = 0;
int newsegsize = 0;
if (a_action == GIN_SEGMENT_INSERT ||
a_action == GIN_SEGMENT_REPLACE)
{
newsegsize = SizeOfGinPostingList((GinPostingList *) walbuf);
walbuf += SHORTALIGN(newsegsize);
}
if (a_action == GIN_SEGMENT_ADDITEMS)
{
memcpy(&nitems, walbuf, sizeof(uint16));
walbuf += sizeof(uint16);
walbuf += nitems * sizeof(ItemPointerData);
}
switch (a_action)
{
case GIN_SEGMENT_ADDITEMS:
appendStringInfo(buf, " %d (add %d items)", a_segno, nitems);
break;
case GIN_SEGMENT_DELETE:
appendStringInfo(buf, " %d (delete)", a_segno);
break;
case GIN_SEGMENT_INSERT:
appendStringInfo(buf, " %d (insert)", a_segno);
break;
case GIN_SEGMENT_REPLACE:
appendStringInfo(buf, " %d (replace)", a_segno);
break;
default:
appendStringInfo(buf, " %d unknown action %d ???", a_segno, a_action);
/* cannot decode unrecognized actions further */
return;
}
}
}
void
gin_desc(StringInfo buf, XLogReaderState *record)
{
char *rec = XLogRecGetData(record);
uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
switch (info)
{
case XLOG_GIN_CREATE_PTREE:
/* no further information */
break;
case XLOG_GIN_INSERT:
{
ginxlogInsert *xlrec = (ginxlogInsert *) rec;
appendStringInfo(buf, "isdata: %c isleaf: %c",
(xlrec->flags & GIN_INSERT_ISDATA) ? 'T' : 'F',
(xlrec->flags & GIN_INSERT_ISLEAF) ? 'T' : 'F');
if (!(xlrec->flags & GIN_INSERT_ISLEAF))
{
char *payload = rec + sizeof(ginxlogInsert);
BlockNumber leftChildBlkno;
BlockNumber rightChildBlkno;
leftChildBlkno = BlockIdGetBlockNumber((BlockId) payload);
payload += sizeof(BlockIdData);
rightChildBlkno = BlockIdGetBlockNumber((BlockId) payload);
payload += sizeof(BlockNumber);
appendStringInfo(buf, " children: %u/%u",
leftChildBlkno, rightChildBlkno);
}
if (XLogRecHasBlockImage(record, 0))
{
if (XLogRecBlockImageApply(record, 0))
appendStringInfoString(buf, " (full page image)");
else
appendStringInfoString(buf, " (full page image, for WAL verification)");
}
else
{
char *payload = XLogRecGetBlockData(record, 0, NULL);
if (!(xlrec->flags & GIN_INSERT_ISDATA))
appendStringInfo(buf, " isdelete: %c",
(((ginxlogInsertEntry *) payload)->isDelete) ? 'T' : 'F');
else if (xlrec->flags & GIN_INSERT_ISLEAF)
desc_recompress_leaf(buf, (ginxlogRecompressDataLeaf *) payload);
else
{
ginxlogInsertDataInternal *insertData =
(ginxlogInsertDataInternal *) payload;
appendStringInfo(buf, " pitem: %u-%u/%u",
PostingItemGetBlockNumber(&insertData->newitem),
ItemPointerGetBlockNumber(&insertData->newitem.key),
ItemPointerGetOffsetNumber(&insertData->newitem.key));
}
}
}
break;
case XLOG_GIN_SPLIT:
{
ginxlogSplit *xlrec = (ginxlogSplit *) rec;
appendStringInfo(buf, "isrootsplit: %c",
(((ginxlogSplit *) rec)->flags & GIN_SPLIT_ROOT) ? 'T' : 'F');
appendStringInfo(buf, " isdata: %c isleaf: %c",
(xlrec->flags & GIN_INSERT_ISDATA) ? 'T' : 'F',
(xlrec->flags & GIN_INSERT_ISLEAF) ? 'T' : 'F');
}
break;
case XLOG_GIN_VACUUM_PAGE:
/* no further information */
break;
case XLOG_GIN_VACUUM_DATA_LEAF_PAGE:
{
if (XLogRecHasBlockImage(record, 0))
{
if (XLogRecBlockImageApply(record, 0))
appendStringInfoString(buf, " (full page image)");
else
appendStringInfoString(buf, " (full page image, for WAL verification)");
}
else
{
ginxlogVacuumDataLeafPage *xlrec =
(ginxlogVacuumDataLeafPage *) XLogRecGetBlockData(record, 0, NULL);
desc_recompress_leaf(buf, &xlrec->data);
}
}
break;
case XLOG_GIN_DELETE_PAGE:
/* no further information */
break;
case XLOG_GIN_UPDATE_META_PAGE:
/* no further information */
break;
case XLOG_GIN_INSERT_LISTPAGE:
/* no further information */
break;
case XLOG_GIN_DELETE_LISTPAGE:
appendStringInfo(buf, "ndeleted: %d",
((ginxlogDeleteListPages *) rec)->ndeleted);
break;
}
}
const char *
gin_identify(uint8 info)
{
const char *id = NULL;
switch (info & ~XLR_INFO_MASK)
{
case XLOG_GIN_CREATE_PTREE:
id = "CREATE_PTREE";
break;
case XLOG_GIN_INSERT:
id = "INSERT";
break;
case XLOG_GIN_SPLIT:
id = "SPLIT";
break;
case XLOG_GIN_VACUUM_PAGE:
id = "VACUUM_PAGE";
break;
case XLOG_GIN_VACUUM_DATA_LEAF_PAGE:
id = "VACUUM_DATA_LEAF_PAGE";
break;
case XLOG_GIN_DELETE_PAGE:
id = "DELETE_PAGE";
break;
case XLOG_GIN_UPDATE_META_PAGE:
id = "UPDATE_META_PAGE";
break;
case XLOG_GIN_INSERT_LISTPAGE:
id = "INSERT_LISTPAGE";
break;
case XLOG_GIN_DELETE_LISTPAGE:
id = "DELETE_LISTPAGE";
break;
}
return id;
}
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