head 1.6; access; symbols Version_2_1:1.5 Version_2:1.1; locks; strict; comment @ * @; 1.6 date 92.05.28.20.26.30; author mer; state Exp; branches; next 1.5; 1.5 date 90.09.12.17.59.17; author cimarron; state Exp; branches; next 1.4; 1.4 date 90.08.18.00.40.04; author cimarron; state Exp; branches; next 1.3; 1.3 date 90.08.17.08.51.12; author cimarron; state Exp; branches; next 1.2; 1.2 date 90.08.08.08.15.20; author cimarron; state Exp; branches; next 1.1; 1.1 date 90.03.31.18.59.59; author cimarron; state Version_2; branches; next ; desc @@ 1.6 log @type TransactionIdData no long exists @ text @/* ---------------------------------------------------------------- * FILE * transam.h * * DESCRIPTION * postgres transaction access method support code header * * NOTES * Transaction System Version 101 now support proper oid * generation and recording in the variable relation. * * IDENTIFICATION * $Header: /private/mer/pg.latest/src/lib/H/access/RCS/transam.h,v 1.5 1990/09/12 17:59:17 cimarron Exp mer $ * ---------------------------------------------------------------- */ #ifndef TransamIncluded /* include this file only once */ #define TransamIncluded 1 /* ---------------- * transaction system version id * * this is stored on the first page of the log, time and variable * relations on the first 4 bytes. This is so that if we improve * the format of the transaction log after postgres version 2, then * people won't have to rebuild their databases. * * TRANS_SYSTEM_VERSION 100 means major version 1 minor version 0. * Two databases with the same major version should be compatible, * even if their minor versions differ. * ---------------- */ #define TRANS_SYSTEM_VERSION 101 /* ---------------- * transaction id status values * * someday we will use "11" = 3 = XID_INVALID to mean the * starting of run-length encoded log data. * ---------------- */ #define XID_COMMIT 2 /* transaction commited */ #define XID_ABORT 1 /* transaction aborted */ #define XID_INPROGRESS 0 /* transaction in progress */ #define XID_INVALID 3 /* other */ typedef unsigned char XidStatus; /* (2 bits) */ /* ---------------- * BitIndexOf computes the index of the Nth xid on a given block * ---------------- */ #define BitIndexOf(N) ((N) * 2) /* ---------------- * transaction page definitions * ---------------- */ #define TP_DataSize BLCKSZ #define TP_NumXidStatusPerBlock (TP_DataSize * 4) #define TP_NumTimePerBlock (TP_DataSize / 4) /* ---------------- * LogRelationContents structure * * This structure describes the storage of the data in the * first 128 bytes of the log relation. This storage is never * used for transaction status because transaction id's begin * their numbering at 512. * * The first 4 bytes of this relation store the version * number of the transction system. * ---------------- */ typedef struct LogRelationContentsData { int TransSystemVersion; } LogRelationContentsData; typedef LogRelationContentsData *LogRelationContents; /* ---------------- * TimeRelationContents structure * * This structure describes the storage of the data in the * first 2048 bytes of the time relation. This storage is never * used for transaction commit times because transaction id's begin * their numbering at 512. * * The first 4 bytes of this relation store the version * number of the transction system. * ---------------- */ typedef struct TimeRelationContentsData { int TransSystemVersion; } TimeRelationContentsData; typedef TimeRelationContentsData *TimeRelationContents; /* ---------------- * VariableRelationContents structure * * The variable relation is a special "relation" which * is used to store various system "variables" persistantly. * Unlike other relations in the system, this relation * is updated in place whenever the variables change. * * The first 4 bytes of this relation store the version * number of the transction system. * * Currently, the relation has only one page and the next * available xid, the last committed xid and the next * available oid are stored there. * ---------------- */ typedef struct VariableRelationContentsData { int TransSystemVersion; TransactionId nextXidData; TransactionId lastXidData; oid nextOid; } VariableRelationContentsData; typedef VariableRelationContentsData *VariableRelationContents; /* ---------------- * extern declarations * ---------------- */ /* ---------------- * global variable extern declarations * ---------------- */ extern Relation LogRelation; extern Relation TimeRelation; extern Relation VariableRelation; extern bool AMI_OVERRIDE; #endif TramsamIncluded @ 1.5 log @simplified header files, added the nextOid field to the variable relation contents structure, incremented the transaction system version number. @ text @d13 1 a13 1 * $Header: RCS/transam.h,v 1.4 90/08/18 00:40:04 cimarron Exp Locker: cimarron $ d117 2 a118 2 TransactionIdData nextXidData; TransactionIdData lastXidData; @ 1.4 log @eliminated less significant .h files @ text @d9 3 a11 1 * d13 1 a13 1 * $Header: RCS/transam.h,v 1.3 90/08/17 08:51:12 cimarron Exp Locker: cimarron $ a19 25 #include #include #include #include #include "tmp/postgres.h" /* for struct varlena, etc. */ #include "access/att.h" #include "access/attnum.h" #include "access/heapam.h" #include "access/htup.h" #include "access/relscan.h" #include "access/skey.h" #include "access/tupdesc.h" #include "catalog/catname.h" #include "rules/rlock.h" #include "storage/block.h" #include "storage/buf.h" #include "storage/bufmgr.h" #include "storage/bufpage.h" #include "utils/memutils.h" #include "utils/log.h" #include "utils/mcxt.h" #include "utils/rel.h" d33 1 a33 1 #define TRANS_SYSTEM_VERSION 100 d111 2 a112 1 * available xid and the last committed xid are stored there. d119 1 @ 1.3 log @added pathnames to #include statements @ text @d11 1 a11 1 * $Header: RCS/transam.h,v 1.2 90/08/08 08:15:20 cimarron Exp Locker: cimarron $ d27 7 a33 1 #include "tmp/bit.h" d38 1 a38 4 #include "catalog/catname.h" #include "tmp/datum.h" #include "access/heapam.h" #include "access/htup.h" a40 1 #include "tmp/name.h" a41 5 #include "access/relscan.h" #include "rules/rlock.h" #include "access/skey.h" #include "access/tupdesc.h" #include "tmp/xid.h" @ 1.2 log @reorganized some header files @ text @d11 1 a11 1 * $Header: RCS/transam.h,v 1.1 90/03/31 18:59:59 cimarron Version_2 Locker: cimarron $ a17 4 /* ---------------- * Include files (XXX clean these up!) * ---------------- */ d23 1 a23 1 #include "postgres.h" /* for struct varlena, etc. */ d25 20 a44 20 #include "att.h" #include "attnum.h" #include "bit.h" #include "block.h" #include "buf.h" #include "bufmgr.h" #include "bufpage.h" #include "catname.h" #include "datum.h" #include "heapam.h" #include "htup.h" #include "log.h" #include "mcxt.h" #include "name.h" #include "rel.h" #include "relscan.h" #include "rlock.h" #include "skey.h" #include "tupdesc.h" #include "xid.h" @ 1.1 log @Initial revision @ text @d11 1 a11 1 * $Header$ a27 1 #include "c.h" a28 1 #include "anum.h" a35 1 #include "cat.h" a42 1 #include "oid.h" a45 1 #include "rproc.h" @