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/*-------------------------------------------------------------------------
*
* gindesc.c
* rmgr descriptor routines for access/transam/gin/ginxlog.c
*
* Portions Copyright (c) 1996-2014, 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/gin_private.h"
#include "lib/stringinfo.h"
#include "storage/relfilenode.h"
static void
desc_node(StringInfo buf, RelFileNode node, BlockNumber blkno)
{
appendStringInfo(buf, "node: %u/%u/%u blkno: %u",
node.spcNode, node.dbNode, node.relNode, blkno);
}
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, XLogRecord *record)
{
char *rec = XLogRecGetData(record);
uint8 info = record->xl_info & ~XLR_INFO_MASK;
switch (info)
{
case XLOG_GIN_CREATE_INDEX:
appendStringInfoString(buf, "Create index, ");
desc_node(buf, *(RelFileNode *) rec, GIN_ROOT_BLKNO);
break;
case XLOG_GIN_CREATE_PTREE:
appendStringInfoString(buf, "Create posting tree, ");
desc_node(buf, ((ginxlogCreatePostingTree *) rec)->node, ((ginxlogCreatePostingTree *) rec)->blkno);
break;
case XLOG_GIN_INSERT:
{
ginxlogInsert *xlrec = (ginxlogInsert *) rec;
char *payload = rec + sizeof(ginxlogInsert);
appendStringInfoString(buf, "Insert item, ");
desc_node(buf, xlrec->node, xlrec->blkno);
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))
{
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 (!(xlrec->flags & GIN_INSERT_ISDATA))
appendStringInfo(buf, " isdelete: %c",
(((ginxlogInsertEntry *) payload)->isDelete) ? 'T' : 'F');
else if (xlrec->flags & GIN_INSERT_ISLEAF)
{
ginxlogRecompressDataLeaf *insertData =
(ginxlogRecompressDataLeaf *) payload;
if (record->xl_info & XLR_BKP_BLOCK(0))
appendStringInfo(buf, " (full page image)");
else
desc_recompress_leaf(buf, insertData);
}
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;
appendStringInfoString(buf, "Page split, ");
desc_node(buf, ((ginxlogSplit *) rec)->node, ((ginxlogSplit *) rec)->lblkno);
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:
appendStringInfoString(buf, "Vacuum page, ");
desc_node(buf, ((ginxlogVacuumPage *) rec)->node, ((ginxlogVacuumPage *) rec)->blkno);
break;
case XLOG_GIN_VACUUM_DATA_LEAF_PAGE:
{
ginxlogVacuumDataLeafPage *xlrec = (ginxlogVacuumDataLeafPage *) rec;
appendStringInfoString(buf, "Vacuum data leaf page, ");
desc_node(buf, xlrec->node, xlrec->blkno);
if (record->xl_info & XLR_BKP_BLOCK(0))
appendStringInfo(buf, " (full page image)");
else
desc_recompress_leaf(buf, &xlrec->data);
}
break;
case XLOG_GIN_DELETE_PAGE:
appendStringInfoString(buf, "Delete page, ");
desc_node(buf, ((ginxlogDeletePage *) rec)->node, ((ginxlogDeletePage *) rec)->blkno);
break;
case XLOG_GIN_UPDATE_META_PAGE:
appendStringInfoString(buf, "Update metapage, ");
desc_node(buf, ((ginxlogUpdateMeta *) rec)->node, GIN_METAPAGE_BLKNO);
break;
case XLOG_GIN_INSERT_LISTPAGE:
appendStringInfoString(buf, "Insert new list page, ");
desc_node(buf, ((ginxlogInsertListPage *) rec)->node, ((ginxlogInsertListPage *) rec)->blkno);
break;
case XLOG_GIN_DELETE_LISTPAGE:
appendStringInfo(buf, "Delete list pages (%d), ", ((ginxlogDeleteListPages *) rec)->ndeleted);
desc_node(buf, ((ginxlogDeleteListPages *) rec)->node, GIN_METAPAGE_BLKNO);
break;
default:
appendStringInfo(buf, "unknown gin op code %u", info);
break;
}
}
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