greenplumn xactdesc 源码

2022-08-18
浏览 (592)

greenplumn xactdesc 代码

文件路径：/src/backend/access/rmgrdesc/xactdesc.c

/*-------------------------------------------------------------------------
 *
 * xactdesc.c
 *	  rmgr descriptor routines for access/transam/xact.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/xactdesc.c
 *
 *-------------------------------------------------------------------------
 */
#include "postgres.h"

#include "access/transam.h"
#include "access/xact.h"
#include "storage/dbdirnode.h"
#include "storage/sinval.h"
#include "storage/standbydefs.h"
#include "utils/timestamp.h"
#include "access/twophase_xlog.h"

/*
 * Parse the WAL format of an xact commit and abort records into an easier to
 * understand format.
 *
 * This routines are in xactdesc.c because they're accessed in backend (when
 * replaying WAL) and frontend (pg_waldump) code. This file is the only xact
 * specific one shared between both. They're complicated enough that
 * duplication would be bothersome.
 */

void
ParseCommitRecord(uint8 info, xl_xact_commit *xlrec, xl_xact_parsed_commit *parsed)
{
	char	   *data = ((char *) xlrec) + MinSizeOfXactCommit;

	memset(parsed, 0, sizeof(*parsed));

	parsed->xinfo = 0;			/* default, if no XLOG_XACT_HAS_INFO is
								 * present */

	parsed->xact_time = xlrec->xact_time;
	parsed->tablespace_oid_to_delete_on_commit = xlrec->tablespace_oid_to_delete_on_commit;

	if (info & XLOG_XACT_HAS_INFO)
	{
		xl_xact_xinfo *xl_xinfo = (xl_xact_xinfo *) data;

		parsed->xinfo = xl_xinfo->xinfo;

		data += sizeof(xl_xact_xinfo);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_DBINFO)
	{
		xl_xact_dbinfo *xl_dbinfo = (xl_xact_dbinfo *) data;

		parsed->dbId = xl_dbinfo->dbId;
		parsed->tsId = xl_dbinfo->tsId;

		data += sizeof(xl_xact_dbinfo);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_SUBXACTS)
	{
		xl_xact_subxacts *xl_subxacts = (xl_xact_subxacts *) data;

		parsed->nsubxacts = xl_subxacts->nsubxacts;
		parsed->subxacts = xl_subxacts->subxacts;

		data += MinSizeOfXactSubxacts;
		data += parsed->nsubxacts * sizeof(TransactionId);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_RELFILENODES)
	{
		xl_xact_relfilenodes *xl_relfilenodes = (xl_xact_relfilenodes *) data;

		parsed->nrels = xl_relfilenodes->nrels;
		parsed->xnodes = xl_relfilenodes->xnodes;

		data += MinSizeOfXactRelfilenodes;
		data += xl_relfilenodes->nrels * sizeof(RelFileNodePendingDelete);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_INVALS)
	{
		xl_xact_invals *xl_invals = (xl_xact_invals *) data;

		parsed->nmsgs = xl_invals->nmsgs;
		parsed->msgs = xl_invals->msgs;

		data += MinSizeOfXactInvals;
		data += xl_invals->nmsgs * sizeof(SharedInvalidationMessage);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_DELDBS)
	{
		xl_xact_deldbs *xl_deldbs = (xl_xact_deldbs *) data;

		parsed->ndeldbs = xl_deldbs->ndeldbs;
		parsed->deldbs = xl_deldbs->deldbs;

		data += MinSizeOfXactDelDbs;
		data += xl_deldbs->ndeldbs * sizeof(DbDirNode);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_TWOPHASE)
	{
		xl_xact_twophase *xl_twophase = (xl_xact_twophase *) data;

		parsed->twophase_xid = xl_twophase->xid;

		data += sizeof(xl_xact_twophase);

		if (parsed->xinfo & XACT_XINFO_HAS_GID)
		{
			strlcpy(parsed->twophase_gid, data, sizeof(parsed->twophase_gid));
			data += strlen(data) + 1;
		}
	}

	/* Note: no alignment is guaranteed after this point */

	if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
	{
		xl_xact_origin xl_origin;

		/* no alignment is guaranteed, so copy onto stack */
		memcpy(&xl_origin, data, sizeof(xl_origin));

		parsed->origin_lsn = xl_origin.origin_lsn;
		parsed->origin_timestamp = xl_origin.origin_timestamp;

		data += sizeof(xl_xact_origin);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_DISTRIB)
	{
		xl_xact_distrib *xl_distrib = (xl_xact_distrib *) data;

		parsed->distribXid = xl_distrib->distrib_xid;
		data += sizeof(xl_xact_distrib);
	}
}

void
ParseAbortRecord(uint8 info, xl_xact_abort *xlrec, xl_xact_parsed_abort *parsed)
{
	char	   *data = ((char *) xlrec) + MinSizeOfXactAbort;

	memset(parsed, 0, sizeof(*parsed));

	parsed->xinfo = 0;			/* default, if no XLOG_XACT_HAS_INFO is
								 * present */

	parsed->xact_time = xlrec->xact_time;
	parsed->tablespace_oid_to_delete_on_abort = xlrec->tablespace_oid_to_delete_on_abort;

	if (info & XLOG_XACT_HAS_INFO)
	{
		xl_xact_xinfo *xl_xinfo = (xl_xact_xinfo *) data;

		parsed->xinfo = xl_xinfo->xinfo;

		data += sizeof(xl_xact_xinfo);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_DBINFO)
	{
		xl_xact_dbinfo *xl_dbinfo = (xl_xact_dbinfo *) data;

		parsed->dbId = xl_dbinfo->dbId;
		parsed->tsId = xl_dbinfo->tsId;

		data += sizeof(xl_xact_dbinfo);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_SUBXACTS)
	{
		xl_xact_subxacts *xl_subxacts = (xl_xact_subxacts *) data;

		parsed->nsubxacts = xl_subxacts->nsubxacts;
		parsed->subxacts = xl_subxacts->subxacts;

		data += MinSizeOfXactSubxacts;
		data += parsed->nsubxacts * sizeof(TransactionId);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_RELFILENODES)
	{
		xl_xact_relfilenodes *xl_relfilenodes = (xl_xact_relfilenodes *) data;

		parsed->nrels = xl_relfilenodes->nrels;
		parsed->xnodes = xl_relfilenodes->xnodes;

		data += MinSizeOfXactRelfilenodes;
		data += xl_relfilenodes->nrels * sizeof(RelFileNodePendingDelete);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_DELDBS)
	{
		xl_xact_deldbs *xl_deldbs = (xl_xact_deldbs *) data;

		parsed->ndeldbs = xl_deldbs->ndeldbs;
		parsed->deldbs = xl_deldbs->deldbs;

		data += MinSizeOfXactDelDbs;
		data += xl_deldbs->ndeldbs * sizeof(DbDirNode);
	}

	if (parsed->xinfo & XACT_XINFO_HAS_TWOPHASE)
	{
		xl_xact_twophase *xl_twophase = (xl_xact_twophase *) data;

		parsed->twophase_xid = xl_twophase->xid;

		data += sizeof(xl_xact_twophase);

		if (parsed->xinfo & XACT_XINFO_HAS_GID)
		{
			strlcpy(parsed->twophase_gid, data, sizeof(parsed->twophase_gid));
			data += strlen(data) + 1;
		}
	}

	/* Note: no alignment is guaranteed after this point */

	if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
	{
		xl_xact_origin xl_origin;

		/* no alignment is guaranteed, so copy onto stack */
		memcpy(&xl_origin, data, sizeof(xl_origin));

		parsed->origin_lsn = xl_origin.origin_lsn;
		parsed->origin_timestamp = xl_origin.origin_timestamp;

		data += sizeof(xl_xact_origin);
	}

}

static void
xact_desc_commit(StringInfo buf, uint8 info, xl_xact_commit *xlrec, RepOriginId origin_id)
{
	xl_xact_parsed_commit parsed;
	int			i;

	ParseCommitRecord(info, xlrec, &parsed);

	/* If this is a prepared xact, show the xid of the original xact */
	if (TransactionIdIsValid(parsed.twophase_xid))
		appendStringInfo(buf, "%u: ", parsed.twophase_xid);

	appendStringInfoString(buf, timestamptz_to_str(xlrec->xact_time));

	if (parsed.nrels > 0)
	{
		appendStringInfoString(buf, "; rels:");
		for (i = 0; i < parsed.nrels; i++)
		{
			BackendId  backendId = parsed.xnodes[i].isTempRelation ?
								  TempRelBackendId : InvalidBackendId;
			char	   *path = relpathbackend(parsed.xnodes[i].node,
											  backendId,
											  MAIN_FORKNUM);

			appendStringInfo(buf, " %s", path);
			pfree(path);
		}
	}
	if (parsed.nsubxacts > 0)
	{
		appendStringInfoString(buf, "; subxacts:");
		for (i = 0; i < parsed.nsubxacts; i++)
			appendStringInfo(buf, " %u", parsed.subxacts[i]);
	}
	if (parsed.nmsgs > 0)
	{
		standby_desc_invalidations(
								   buf, parsed.nmsgs, parsed.msgs, parsed.dbId, parsed.tsId,
								   XactCompletionRelcacheInitFileInval(parsed.xinfo));
	}
	if (parsed.ndeldbs > 0)
	{
		appendStringInfoString(buf, "; deldbs:");
		for (i = 0; i < parsed.ndeldbs; i++)
		{
			char *path =
					 GetDatabasePath(parsed.deldbs[i].database, parsed.deldbs[i].tablespace);

			appendStringInfo(buf, " %s", path);
			pfree(path);
		}
	}
	if (xlrec->tablespace_oid_to_delete_on_commit != InvalidOid)
		appendStringInfo(buf, "; tablespace_oid_to_delete_on_commit: %u", xlrec->tablespace_oid_to_delete_on_commit);

	if (XactCompletionForceSyncCommit(parsed.xinfo))
		appendStringInfoString(buf, "; sync");

	if (parsed.xinfo & XACT_XINFO_HAS_ORIGIN)
	{
		appendStringInfo(buf, "; origin: node %u, lsn %X/%X, at %s",
						 origin_id,
						 (uint32) (parsed.origin_lsn >> 32),
						 (uint32) parsed.origin_lsn,
						 timestamptz_to_str(parsed.origin_timestamp));
	}

	if (parsed.distribXid != InvalidDistributedTransactionId)
	{
		appendStringInfo(buf, " gxid = "UINT64_FORMAT, parsed.distribXid);
	}
}

static void
xact_desc_distributed_commit(StringInfo buf, uint8 info, xl_xact_commit *xlrec, RepOriginId origin_id)
{
	xl_xact_parsed_commit parsed;

	ParseCommitRecord(info, xlrec, &parsed);

	appendStringInfoString(buf, timestamptz_to_str(xlrec->xact_time));
	appendStringInfo(buf, " gxid = "UINT64_FORMAT, parsed.distribXid);
}

static void
xact_desc_distributed_forget(StringInfo buf, xl_xact_distributed_forget *xlrec)
{
	appendStringInfo(buf, "gxid = "UINT64_FORMAT, xlrec->gxid);
}

static void
xact_desc_abort(StringInfo buf, uint8 info, xl_xact_abort *xlrec)
{
	xl_xact_parsed_abort parsed;
	int			i;

	ParseAbortRecord(info, xlrec, &parsed);

	/* If this is a prepared xact, show the xid of the original xact */
	if (TransactionIdIsValid(parsed.twophase_xid))
		appendStringInfo(buf, "%u: ", parsed.twophase_xid);

	appendStringInfoString(buf, timestamptz_to_str(xlrec->xact_time));
	if (parsed.nrels > 0)
	{
		appendStringInfoString(buf, "; rels:");
		for (i = 0; i < parsed.nrels; i++)
		{
			BackendId  backendId = parsed.xnodes[i].isTempRelation ?
								  TempRelBackendId : InvalidBackendId;
			char	   *path = relpathbackend(parsed.xnodes[i].node,
											  backendId,
											  MAIN_FORKNUM);

			appendStringInfo(buf, " %s", path);
			pfree(path);
		}
	}

	if (parsed.nsubxacts > 0)
	{
		appendStringInfoString(buf, "; subxacts:");
		for (i = 0; i < parsed.nsubxacts; i++)
			appendStringInfo(buf, " %u", parsed.subxacts[i]);
	}
	if (parsed.ndeldbs > 0)
	{
		appendStringInfoString(buf, "; deldbs:");
		for (i = 0; i < parsed.ndeldbs; i++)
		{
			char *path =
					 GetDatabasePath(parsed.deldbs[i].database, parsed.deldbs[i].tablespace);

			appendStringInfo(buf, " %s", path);
			pfree(path);
		}
	}
	if (xlrec->tablespace_oid_to_delete_on_abort != InvalidOid)
		appendStringInfo(buf, "; tablespace_oid_to_delete_on_abort: %u", xlrec->tablespace_oid_to_delete_on_abort);
}

static void
xact_desc_assignment(StringInfo buf, xl_xact_assignment *xlrec)
{
	int			i;

	appendStringInfoString(buf, "subxacts:");

	for (i = 0; i < xlrec->nsubxacts; i++)
		appendStringInfo(buf, " %u", xlrec->xsub[i]);
}

static void
xact_desc_prepare(StringInfo buf, uint8 info, TwoPhaseFileHeader *tpfh)
{
	const char *gid;
	Assert(info == XLOG_XACT_PREPARE);

	appendStringInfo(buf, "at = %s", timestamptz_to_str(tpfh->prepared_at));

	if (tpfh->gidlen > 0)
	{
		gid = (const char *)tpfh + MAXALIGN(sizeof(*tpfh));
		Assert(strlen(gid) == (tpfh->gidlen -1));

		appendStringInfo(buf, "; gid = %*s", tpfh->gidlen - 1, gid);
	}

	if (tpfh->tablespace_oid_to_delete_on_commit != InvalidOid)
		appendStringInfo(buf, "; tablespace_oid_to_delete_on_commit = %u", tpfh->tablespace_oid_to_delete_on_commit);
	if (tpfh->tablespace_oid_to_delete_on_abort != InvalidOid)
		appendStringInfo(buf, "; tablespace_oid_to_delete_on_abort = %u", tpfh->tablespace_oid_to_delete_on_abort);
}

void
xact_desc(StringInfo buf, XLogReaderState *record)
{
	char	   *rec = XLogRecGetData(record);
	uint8		info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;

	if (info == XLOG_XACT_COMMIT || info == XLOG_XACT_COMMIT_PREPARED)
	{
		xl_xact_commit *xlrec = (xl_xact_commit *) rec;

		xact_desc_commit(buf, XLogRecGetInfo(record), xlrec,
						 XLogRecGetOrigin(record));
	}
	else if (info == XLOG_XACT_ABORT || info == XLOG_XACT_ABORT_PREPARED)
	{
		xl_xact_abort *xlrec = (xl_xact_abort *) rec;

		xact_desc_abort(buf, XLogRecGetInfo(record), xlrec);
	}
	else if (info == XLOG_XACT_PREPARE)
	{
		TwoPhaseFileHeader *tpfh = (TwoPhaseFileHeader*) rec;
		xact_desc_prepare(buf, XLogRecGetInfo(record), tpfh);
	}
	else if (info == XLOG_XACT_ASSIGNMENT)
	{
		xl_xact_assignment *xlrec = (xl_xact_assignment *) rec;

		/*
		 * Note that we ignore the WAL record's xid, since we're more
		 * interested in the top-level xid that issued the record and which
		 * xids are being reported here.
		 */
		appendStringInfo(buf, "xtop %u: ", xlrec->xtop);
		xact_desc_assignment(buf, xlrec);
	}
	else if (info == XLOG_XACT_DISTRIBUTED_COMMIT)
	{
		xl_xact_commit *xlrec = (xl_xact_commit *) rec;

		appendStringInfo(buf, "distributed commit ");
		xact_desc_distributed_commit(buf, XLogRecGetInfo(record), xlrec,
						 XLogRecGetOrigin(record));
	}
	else if (info == XLOG_XACT_DISTRIBUTED_FORGET)
	{
		xl_xact_distributed_forget *xlrec = (xl_xact_distributed_forget *) rec;

		appendStringInfo(buf, "distributed forget ");
		xact_desc_distributed_forget(buf, xlrec);
	}
}

const char *
xact_identify(uint8 info)
{
	const char *id = NULL;

	switch (info & XLOG_XACT_OPMASK)
	{
		case XLOG_XACT_COMMIT:
			id = "COMMIT";
			break;
		case XLOG_XACT_PREPARE:
			id = "PREPARE";
			break;
		case XLOG_XACT_ABORT:
			id = "ABORT";
			break;
		case XLOG_XACT_COMMIT_PREPARED:
			id = "COMMIT_PREPARED";
			break;
		case XLOG_XACT_ABORT_PREPARED:
			id = "ABORT_PREPARED";
			break;
		case XLOG_XACT_ASSIGNMENT:
			id = "ASSIGNMENT";
			break;
		case XLOG_XACT_DISTRIBUTED_COMMIT:
			id = "DISTRIBUTED_COMMIT";
			break;
		case XLOG_XACT_DISTRIBUTED_FORGET:
			id = "DISTRIBUTED_FORGET";
			break;
	}

	return id;
}

相关信息

greenplumn 源码目录

相关文章

greenplumn appendonlydesc 源码

greenplumn bitmapdesc 源码

greenplumn brindesc 源码

greenplumn clogdesc 源码

greenplumn committsdesc 源码

greenplumn dbasedesc 源码

greenplumn distributedlogdesc 源码

greenplumn genericdesc 源码

greenplumn gindesc 源码

greenplumn gistdesc 源码

0 赞

所属分类： 大数据
本文标签： greenplum
版权声明： 原创文章如转载，请注明本文链接: https://www.seaxiang.com/blog/68bac6b096344ea9824ebc904e6298c7

热门推荐

1、直接访问google.com
2、 - 优质文章
3、 gate.io
4、 harmony 鸿蒙hdc使用指导
5、 harmony 鸿蒙初识ArkTS语言
6、 harmony 鸿蒙ArkUI组件（ArkTS）开发常见问题
7、 flink kafka connector scan.startup.mode 的几个选项
8、 golang
9、 openharmony
10、 Vue中input框自动聚焦

Loading...