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e812458b27
* Buffer refcount cleanup (per my "progress report" to pghackers, 9/22). * Add links to backend PROC structs to sinval's array of per-backend info, and use these links for routines that need to check the state of all backends (rather than the slow, complicated search of the ShmemIndex hashtable that was used before). Add databaseOID to PROC structs. * Use this to implement an interlock that prevents DESTROY DATABASE of a database containing running backends. (It's a little tricky to prevent a concurrently-starting backend from getting in there, since the new backend is not able to lock anything at the time it tries to look up its database in pg_database. My solution is to recheck that the DB is OK at the end of InitPostgres. It may not be a 100% solution, but it's a lot better than no interlock at all...) * In ALTER TABLE RENAME, flush buffers for the relation before doing the rename of the physical files, to ensure we don't get failures later from mdblindwrt(). * Update TRUNCATE patch so that it actually compiles against current sources :-(. You should do "make clean all" after pulling these changes.
203 lines
6.2 KiB
C
203 lines
6.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* miscadmin.h
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* this file contains general postgres administration and initialization
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* stuff that used to be spread out between the following files:
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* globals.h global variables
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* pdir.h directory path crud
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* pinit.h postgres initialization
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* pmod.h processing modes
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: miscadmin.h,v 1.41 1999/09/24 00:25:16 tgl Exp $
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*
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* NOTES
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* some of the information in this file will be moved to
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* other files.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MISCADMIN_H
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#define MISCADMIN_H
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/*****************************************************************************
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* globals.h -- *
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*****************************************************************************/
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/*
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* from postmaster/postmaster.c
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*/
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extern int PostmasterMain(int argc, char *argv[]);
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/*
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* from utils/init/globals.c
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*/
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extern bool Noversion;
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extern bool Quiet;
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extern bool QueryCancel;
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extern char *DataDir;
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extern int MyProcPid;
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extern struct Port *MyProcPort;
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extern long MyCancelKey;
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extern char OutputFileName[];
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/*
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* done in storage/backendid.h for now.
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*
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* extern BackendId MyBackendId;
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* extern BackendTag MyBackendTag;
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*/
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extern bool MyDatabaseIdIsInitialized;
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extern Oid MyDatabaseId;
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extern bool TransactionInitWasProcessed;
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extern bool IsUnderPostmaster;
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extern short DebugLvl;
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/* Date/Time Configuration
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*
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* Constants to pass info from runtime environment:
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* USE_POSTGRES_DATES specifies traditional postgres format for output.
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* USE_ISO_DATES specifies ISO-compliant format for output.
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* USE_SQL_DATES specified Oracle/Ingres-compliant format for output.
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* USE_GERMAN_DATES specifies German-style dd.mm/yyyy date format.
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*
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* DateStyle specifies preference for date formatting for output.
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* EuroDates if client prefers dates interpreted and written w/European conventions.
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*
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* HasCTZSet if client timezone is specified by client.
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* CDayLight is the apparent daylight savings time status.
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* CTimeZone is the timezone offset in seconds.
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* CTZName is the timezone label.
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*/
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#define MAXTZLEN 7
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#define USE_POSTGRES_DATES 0
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#define USE_ISO_DATES 1
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#define USE_SQL_DATES 2
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#define USE_GERMAN_DATES 3
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extern int DateStyle;
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extern bool EuroDates;
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extern bool HasCTZSet;
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extern bool CDayLight;
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extern int CTimeZone;
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extern char CTZName[];
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extern char FloatFormat[];
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extern char DateFormat[];
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extern bool disableFsync;
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extern bool allowSystemTableMods;
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extern int SortMem;
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extern Oid LastOidProcessed; /* for query rewrite */
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/* #define MAX_QUERY_SIZE (BLCKSZ*2) */
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#define MAX_PARSE_BUFFER MAX_QUERY_SIZE
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/*****************************************************************************
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* pdir.h -- *
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* POSTGRES directory path definitions. *
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*****************************************************************************/
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extern char *DatabaseName;
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extern char *DatabasePath;
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/* in utils/misc/database.c */
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extern void GetRawDatabaseInfo(char *name, Oid *db_id, char *path);
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extern int GetDatabaseInfo(char *name, int4 *owner, char *path);
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extern char *ExpandDatabasePath(char *path);
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/* now in utils/init/miscinit.c */
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extern void SetDatabaseName(char *name);
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extern void SetDatabasePath(char *path);
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/* even if MB is not enabled, this function is neccesary
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* since pg_proc.h does have.
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*/
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extern const char *getdatabaseencoding(void);
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extern char *getpgusername(void);
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extern void SetPgUserName(void);
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extern int GetUserId(void);
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extern void SetUserId(void);
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extern int ValidateBinary(char *path);
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extern int FindExec(char *backend, char *argv0, char *binary_name);
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extern int CheckPathAccess(char *path, char *name, int open_mode);
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/* lower case version for case-insensitive SQL referenced in pg_proc.h */
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#define GetPgUserName() getpgusername()
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/*****************************************************************************
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* pmod.h -- *
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* POSTGRES processing mode definitions. *
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*****************************************************************************/
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/*
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* Description:
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* There are four processing modes in POSTGRES. They are NoProcessing
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* or "none," BootstrapProcessing or "bootstrap," InitProcessing or
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* "initialization," and NormalProcessing or "normal."
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*
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* If a POSTGRES binary is in normal mode, then all code may be executed
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* normally. In the none mode, only bookkeeping code may be called. In
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* particular, access method calls may not occur in this mode since the
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* execution state is outside a transaction.
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*
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* The final two processing modes are used during special times. When the
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* system state indicates bootstrap processing, transactions are all given
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* transaction id "one" and are consequently guarenteed to commit. This mode
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* is used during the initial generation of template databases.
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*
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* Finally, the execution state is in initialization mode until all normal
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* initialization is complete. Some code behaves differently when executed in
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* this mode to enable system bootstrapping.
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*/
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typedef enum ProcessingMode
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{
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NoProcessing, /* "nothing" can be done */
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BootstrapProcessing, /* bootstrap creation of template database */
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InitProcessing, /* initializing system */
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NormalProcessing /* normal processing */
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} ProcessingMode;
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/*****************************************************************************
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* pinit.h -- *
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* POSTGRES initialization and cleanup definitions. *
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*****************************************************************************/
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/*
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* Note:
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* XXX AddExitHandler not defined yet.
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*/
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typedef int16 ExitStatus;
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#define NormalExitStatus (0)
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#define FatalExitStatus (127)
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/* XXX are there any other meaningful exit codes? */
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/* in utils/init/postinit.c */
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extern bool PostgresIsInitialized;
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extern void InitPostgres(char *name);
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/* in miscinit.c */
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extern void ExitPostgres(ExitStatus status);
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extern bool IsBootstrapProcessingMode(void);
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extern bool IsInitProcessingMode(void);
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extern bool IsNormalProcessingMode(void);
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extern void SetProcessingMode(ProcessingMode mode);
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extern ProcessingMode GetProcessingMode(void);
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#endif /* MISCADMIN_H */
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