| Server IP : 103.119.228.120 / Your IP : 3.17.154.144 Web Server : Apache System : Linux v8.techscape8.com 3.10.0-1160.119.1.el7.tuxcare.els2.x86_64 #1 SMP Mon Jul 15 12:09:18 UTC 2024 x86_64 User : nobody ( 99) PHP Version : 5.6.40 Disable Function : shell_exec,symlink,system,exec,proc_get_status,proc_nice,proc_terminate,define_syslog_variables,syslog,openlog,closelog,escapeshellcmd,passthru,ocinum cols,ini_alter,leak,listen,chgrp,apache_note,apache_setenv,debugger_on,debugger_off,ftp_exec,dl,dll,myshellexec,proc_open,socket_bind,proc_close,escapeshellarg,parse_ini_filepopen,fpassthru,exec,passthru,escapeshellarg,escapeshellcmd,proc_close,proc_open,ini_alter,popen,show_source,proc_nice,proc_terminate,proc_get_status,proc_close,pfsockopen,leak,apache_child_terminate,posix_kill,posix_mkfifo,posix_setpgid,posix_setsid,posix_setuid,dl,symlink,shell_exec,system,dl,passthru,escapeshellarg,escapeshellcmd,myshellexec,c99_buff_prepare,c99_sess_put,fpassthru,getdisfunc,fx29exec,fx29exec2,is_windows,disp_freespace,fx29sh_getupdate,fx29_buff_prepare,fx29_sess_put,fx29shexit,fx29fsearch,fx29ftpbrutecheck,fx29sh_tools,fx29sh_about,milw0rm,imagez,sh_name,myshellexec,checkproxyhost,dosyayicek,c99_buff_prepare,c99_sess_put,c99getsource,c99sh_getupdate,c99fsearch,c99shexit,view_perms,posix_getpwuid,posix_getgrgid,posix_kill,parse_perms,parsesort,view_perms_color,set_encoder_input,ls_setcheckboxall,ls_reverse_all,rsg_read,rsg_glob,selfURL,dispsecinfo,unix2DosTime,addFile,system,get_users,view_size,DirFiles,DirFilesWide,DirPrintHTMLHeaders,GetFilesTotal,GetTitles,GetTimeTotal,GetMatchesCount,GetFileMatchesCount,GetResultFiles,fs_copy_dir,fs_copy_obj,fs_move_dir,fs_move_obj,fs_rmdir,SearchText,getmicrotime MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/local/ssl/local/ssl/include/pgsql/server/utils/ |
Upload File : |
/*-------------------------------------------------------------------------
*
* tqual.h
* POSTGRES "time qualification" definitions, ie, tuple visibility rules.
*
* Should be moved/renamed... - vadim 07/28/98
*
* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/utils/tqual.h
*
*-------------------------------------------------------------------------
*/
#ifndef TQUAL_H
#define TQUAL_H
#include "utils/snapshot.h"
/* Static variables representing various special snapshot semantics */
extern PGDLLIMPORT SnapshotData SnapshotNowData;
extern PGDLLIMPORT SnapshotData SnapshotSelfData;
extern PGDLLIMPORT SnapshotData SnapshotAnyData;
extern PGDLLIMPORT SnapshotData SnapshotToastData;
#define SnapshotNow (&SnapshotNowData)
#define SnapshotSelf (&SnapshotSelfData)
#define SnapshotAny (&SnapshotAnyData)
#define SnapshotToast (&SnapshotToastData)
/*
* We don't provide a static SnapshotDirty variable because it would be
* non-reentrant. Instead, users of that snapshot type should declare a
* local variable of type SnapshotData, and initialize it with this macro.
*/
#define InitDirtySnapshot(snapshotdata) \
((snapshotdata).satisfies = HeapTupleSatisfiesDirty)
/* This macro encodes the knowledge of which snapshots are MVCC-safe */
#define IsMVCCSnapshot(snapshot) \
((snapshot)->satisfies == HeapTupleSatisfiesMVCC)
/*
* HeapTupleSatisfiesVisibility
* True iff heap tuple satisfies a time qual.
*
* Notes:
* Assumes heap tuple is valid.
* Beware of multiple evaluations of snapshot argument.
* Hint bits in the HeapTuple's t_infomask may be updated as a side effect;
* if so, the indicated buffer is marked dirty.
*/
#define HeapTupleSatisfiesVisibility(tuple, snapshot, buffer) \
((*(snapshot)->satisfies) ((tuple)->t_data, snapshot, buffer))
/* Result codes for HeapTupleSatisfiesVacuum */
typedef enum
{
HEAPTUPLE_DEAD, /* tuple is dead and deletable */
HEAPTUPLE_LIVE, /* tuple is live (committed, no deleter) */
HEAPTUPLE_RECENTLY_DEAD, /* tuple is dead, but not deletable yet */
HEAPTUPLE_INSERT_IN_PROGRESS, /* inserting xact is still in progress */
HEAPTUPLE_DELETE_IN_PROGRESS /* deleting xact is still in progress */
} HTSV_Result;
/* These are the "satisfies" test routines for the various snapshot types */
extern bool HeapTupleSatisfiesMVCC(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesNow(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesSelf(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesAny(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesToast(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesDirty(HeapTupleHeader tuple,
Snapshot snapshot, Buffer buffer);
/* Special "satisfies" routines with different APIs */
extern HTSU_Result HeapTupleSatisfiesUpdate(HeapTupleHeader tuple,
CommandId curcid, Buffer buffer);
extern HTSV_Result HeapTupleSatisfiesVacuum(HeapTupleHeader tuple,
TransactionId OldestXmin, Buffer buffer);
extern bool HeapTupleIsSurelyDead(HeapTupleHeader tuple,
TransactionId OldestXmin);
extern bool XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot);
extern void HeapTupleSetHintBits(HeapTupleHeader tuple, Buffer buffer,
uint16 infomask, TransactionId xid);
#endif /* TQUAL_H */