greenplumn spgdesc 源码
greenplumn spgdesc 代码
文件路径：/src/backend/access/rmgrdesc/spgdesc.c
/*-------------------------------------------------------------------------
*
* spgdesc.c
* rmgr descriptor routines for access/spgist/spgxlog.c
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/access/rmgrdesc/spgdesc.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/spgxlog.h"
void
spg_desc(StringInfo buf, XLogReaderState *record)
{
char *rec = XLogRecGetData(record);
uint8 info = XLogRecGetInfo(record) & ~XLR_INFO_MASK;
switch (info)
{
case XLOG_SPGIST_ADD_LEAF:
{
spgxlogAddLeaf *xlrec = (spgxlogAddLeaf *) rec;
appendStringInfoString(buf, "add leaf to page");
appendStringInfo(buf, "; off %u; headoff %u; parentoff %u",
xlrec->offnumLeaf, xlrec->offnumHeadLeaf,
xlrec->offnumParent);
if (xlrec->newPage)
appendStringInfoString(buf, " (newpage)");
if (xlrec->storesNulls)
appendStringInfoString(buf, " (nulls)");
}
break;
case XLOG_SPGIST_MOVE_LEAFS:
appendStringInfo(buf, "%u leafs",
((spgxlogMoveLeafs *) rec)->nMoves);
break;
case XLOG_SPGIST_ADD_NODE:
appendStringInfo(buf, "off %u",
((spgxlogAddNode *) rec)->offnum);
break;
case XLOG_SPGIST_SPLIT_TUPLE:
appendStringInfo(buf, "prefix off: %u, postfix off: %u (same %d, new %d)",
((spgxlogSplitTuple *) rec)->offnumPrefix,
((spgxlogSplitTuple *) rec)->offnumPostfix,
((spgxlogSplitTuple *) rec)->postfixBlkSame,
((spgxlogSplitTuple *) rec)->newPage
);
break;
case XLOG_SPGIST_PICKSPLIT:
{
spgxlogPickSplit *xlrec = (spgxlogPickSplit *) rec;
appendStringInfo(buf, "ndel %u; nins %u",
xlrec->nDelete, xlrec->nInsert);
if (xlrec->innerIsParent)
appendStringInfoString(buf, " (innerIsParent)");
if (xlrec->isRootSplit)
appendStringInfoString(buf, " (isRootSplit)");
}
break;
case XLOG_SPGIST_VACUUM_LEAF:
/* no further information */
break;
case XLOG_SPGIST_VACUUM_ROOT:
/* no further information */
break;
case XLOG_SPGIST_VACUUM_REDIRECT:
appendStringInfo(buf, "newest XID %u",
((spgxlogVacuumRedirect *) rec)->newestRedirectXid);
break;
}
}
const char *
spg_identify(uint8 info)
{
const char *id = NULL;
switch (info & ~XLR_INFO_MASK)
{
case XLOG_SPGIST_ADD_LEAF:
id = "ADD_LEAF";
break;
case XLOG_SPGIST_MOVE_LEAFS:
id = "MOVE_LEAFS";
break;
case XLOG_SPGIST_ADD_NODE:
id = "ADD_NODE";
break;
case XLOG_SPGIST_SPLIT_TUPLE:
id = "SPLIT_TUPLE";
break;
case XLOG_SPGIST_PICKSPLIT:
id = "PICKSPLIT";
break;
case XLOG_SPGIST_VACUUM_LEAF:
id = "VACUUM_LEAF";
break;
case XLOG_SPGIST_VACUUM_ROOT:
id = "VACUUM_ROOT";
break;
case XLOG_SPGIST_VACUUM_REDIRECT:
id = "VACUUM_REDIRECT";
break;
}
return id;
}
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