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bootstrap.c
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Bruce Momjian authoredBruce Momjian authored
bootstrap.c 28.08 KiB
/*-------------------------------------------------------------------------
*
* bootstrap.c
* routines to support running postgres in 'bootstrap' mode
* bootstrap mode is used to create the initial template database
*
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.260 2010/02/26 02:00:35 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <time.h>
#include <unistd.h>
#include <signal.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include "access/genam.h"
#include "access/heapam.h"
#include "access/xact.h"
#include "bootstrap/bootstrap.h"
#include "catalog/index.h"
#include "catalog/pg_type.h"
#include "libpq/pqsignal.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "postmaster/bgwriter.h"
#include "postmaster/walwriter.h"
#include "replication/walreceiver.h"
#include "storage/bufmgr.h"
#include "storage/ipc.h"
#include "storage/proc.h"
#include "storage/procsignal.h"
#include "tcop/tcopprot.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/memutils.h"
#include "utils/ps_status.h"
#include "utils/relmapper.h"
#include "utils/tqual.h"
extern int optind;
extern char *optarg;
#define ALLOC(t, c) ((t *) calloc((unsigned)(c), sizeof(t)))
static void CheckerModeMain(void);
static void BootstrapModeMain(void);
static void bootstrap_signals(void);
static void ShutdownAuxiliaryProcess(int code, Datum arg);
static Form_pg_attribute AllocateAttribute(void);
static Oid gettype(char *type);
static void cleanup(void);
/* ----------------
* global variables
* ----------------
*/
Relation boot_reldesc; /* current relation descriptor */
Form_pg_attribute attrtypes[MAXATTR]; /* points to attribute info */
int numattr; /* number of attributes for cur. rel */
/*
* Basic information associated with each type. This is used before
* pg_type is created.
*
* XXX several of these input/output functions do catalog scans
* (e.g., F_REGPROCIN scans pg_proc). this obviously creates some
* order dependencies in the catalog creation process.
*/
struct typinfo
{
char name[NAMEDATALEN];
Oid oid;
Oid elem;
int16 len;
bool byval;
char align;
char storage;
Oid inproc;
Oid outproc;
};
static const struct typinfo TypInfo[] = {
{"bool", BOOLOID, 0, 1, true, 'c', 'p',
F_BOOLIN, F_BOOLOUT},
{"bytea", BYTEAOID, 0, -1, false, 'i', 'x',
F_BYTEAIN, F_BYTEAOUT},
{"char", CHAROID, 0, 1, true, 'c', 'p',
F_CHARIN, F_CHAROUT},
{"int2", INT2OID, 0, 2, true, 's', 'p',
F_INT2IN, F_INT2OUT},
{"int4", INT4OID, 0, 4, true, 'i', 'p',
F_INT4IN, F_INT4OUT},
{"float4", FLOAT4OID, 0, 4, FLOAT4PASSBYVAL, 'i', 'p',
F_FLOAT4IN, F_FLOAT4OUT},
{"name", NAMEOID, CHAROID, NAMEDATALEN, false, 'c', 'p',
F_NAMEIN, F_NAMEOUT},
{"regclass", REGCLASSOID, 0, 4, true, 'i', 'p',
F_REGCLASSIN, F_REGCLASSOUT},
{"regproc", REGPROCOID, 0, 4, true, 'i', 'p',
F_REGPROCIN, F_REGPROCOUT},
{"regtype", REGTYPEOID, 0, 4, true, 'i', 'p',
F_REGTYPEIN, F_REGTYPEOUT},
{"text", TEXTOID, 0, -1, false, 'i', 'x',
F_TEXTIN, F_TEXTOUT},
{"oid", OIDOID, 0, 4, true, 'i', 'p',
F_OIDIN, F_OIDOUT},
{"tid", TIDOID, 0, 6, false, 's', 'p',
F_TIDIN, F_TIDOUT},
{"xid", XIDOID, 0, 4, true, 'i', 'p',
F_XIDIN, F_XIDOUT},
{"cid", CIDOID, 0, 4, true, 'i', 'p',
F_CIDIN, F_CIDOUT},
{"int2vector", INT2VECTOROID, INT2OID, -1, false, 'i', 'p',
F_INT2VECTORIN, F_INT2VECTOROUT},
{"oidvector", OIDVECTOROID, OIDOID, -1, false, 'i', 'p',
F_OIDVECTORIN, F_OIDVECTOROUT},
{"_int4", INT4ARRAYOID, INT4OID, -1, false, 'i', 'x',
F_ARRAY_IN, F_ARRAY_OUT},
{"_text", 1009, TEXTOID, -1, false, 'i', 'x',
F_ARRAY_IN, F_ARRAY_OUT},
{"_oid", 1028, OIDOID, -1, false, 'i', 'x',
F_ARRAY_IN, F_ARRAY_OUT},
{"_char", 1002, CHAROID, -1, false, 'i', 'x',
F_ARRAY_IN, F_ARRAY_OUT},
{"_aclitem", 1034, ACLITEMOID, -1, false, 'i', 'x',
F_ARRAY_IN, F_ARRAY_OUT}
};
static const int n_types = sizeof(TypInfo) / sizeof(struct typinfo);
struct typmap
{ /* a hack */
Oid am_oid;
FormData_pg_type am_typ;
};
static struct typmap **Typ = NULL;
static struct typmap *Ap = NULL;
static Datum values[MAXATTR]; /* current row's attribute values */
static bool Nulls[MAXATTR];
static MemoryContext nogc = NULL; /* special no-gc mem context */
/*
* At bootstrap time, we first declare all the indices to be built, and
* then build them. The IndexList structure stores enough information
* to allow us to build the indices after they've been declared.
*/
typedef struct _IndexList
{
Oid il_heap;
Oid il_ind;
IndexInfo *il_info;
struct _IndexList *il_next;
} IndexList;
static IndexList *ILHead = NULL;
/*
* AuxiliaryProcessMain
*
* The main entry point for auxiliary processes, such as the bgwriter,
* walwriter, walreceiver, bootstrapper and the shared memory checker code.
*
* This code is here just because of historical reasons.
*/
void
AuxiliaryProcessMain(int argc, char *argv[])
{
char *progname = argv[0];
int flag;
AuxProcType auxType = CheckerProcess;
char *userDoption = NULL;
/*
* initialize globals
*/
MyProcPid = getpid();
MyStartTime = time(NULL);
/*
* Fire up essential subsystems: error and memory management
*
* If we are running under the postmaster, this is done already.
*/
if (!IsUnderPostmaster)
MemoryContextInit();
/* Compute paths, if we didn't inherit them from postmaster */
if (my_exec_path[0] == '\0')
{
if (find_my_exec(progname, my_exec_path) < 0)
elog(FATAL, "%s: could not locate my own executable path",
progname); }
/*
* process command arguments
*/
/* Set defaults, to be overriden by explicit options below */
if (!IsUnderPostmaster)
InitializeGUCOptions();
/* Ignore the initial --boot argument, if present */
if (argc > 1 && strcmp(argv[1], "--boot") == 0)
{
argv++;
argc--;
}
while ((flag = getopt(argc, argv, "B:c:d:D:Fr:x:-:")) != -1)
{
switch (flag)
{
case 'B':
SetConfigOption("shared_buffers", optarg, PGC_POSTMASTER, PGC_S_ARGV);
break;
case 'D':
userDoption = optarg;
break;
case 'd':
{
/* Turn on debugging for the bootstrap process. */
char *debugstr = palloc(strlen("debug") + strlen(optarg) + 1);
sprintf(debugstr, "debug%s", optarg);
SetConfigOption("log_min_messages", debugstr,
PGC_POSTMASTER, PGC_S_ARGV);
SetConfigOption("client_min_messages", debugstr,
PGC_POSTMASTER, PGC_S_ARGV);
pfree(debugstr);
}
break;
case 'F':
SetConfigOption("fsync", "false", PGC_POSTMASTER, PGC_S_ARGV);
break;
case 'r':
strlcpy(OutputFileName, optarg, MAXPGPATH);
break;
case 'x':
auxType = atoi(optarg);
break;
case 'c':
case '-':
{
char *name,
*value;
ParseLongOption(optarg, &name, &value);
if (!value)
{
if (flag == '-')
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("--%s requires a value",
optarg)));
else
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("-c %s requires a value",
optarg)));
}
SetConfigOption(name, value, PGC_POSTMASTER, PGC_S_ARGV);
free(name);
if (value)
free(value);
break;
}
default:
write_stderr("Try \"%s --help\" for more information.\n",
progname);
proc_exit(1);
break;
}
}
if (argc != optind)
{
write_stderr("%s: invalid command-line arguments\n", progname);
proc_exit(1);
}
/*
* Identify myself via ps
*/
if (IsUnderPostmaster)
{
const char *statmsg;
switch (auxType)
{
case StartupProcess:
statmsg = "startup process";
break;
case BgWriterProcess:
statmsg = "writer process";
break;
case WalWriterProcess:
statmsg = "wal writer process";
break;
case WalReceiverProcess:
statmsg = "wal receiver process";
break;
default:
statmsg = "??? process";
break;
}
init_ps_display(statmsg, "", "", "");
}
/* Acquire configuration parameters, unless inherited from postmaster */
if (!IsUnderPostmaster)
{
if (!SelectConfigFiles(userDoption, progname))
proc_exit(1);
/* If timezone is not set, determine what the OS uses */
pg_timezone_initialize();
/* If timezone_abbreviations is not set, select default */
pg_timezone_abbrev_initialize();
}
/* Validate we have been given a reasonable-looking DataDir */
Assert(DataDir);
ValidatePgVersion(DataDir);
/* Change into DataDir (if under postmaster, should be done already) */
if (!IsUnderPostmaster)
ChangeToDataDir();
/* If standalone, create lockfile for data directory */
if (!IsUnderPostmaster)
CreateDataDirLockFile(false);
SetProcessingMode(BootstrapProcessing);
IgnoreSystemIndexes = true;
BaseInit();
/*
* When we are an auxiliary process, we aren't going to do the full
* InitPostgres pushups, but there are a couple of things that need to get
* lit up even in an auxiliary process.
*/
if (IsUnderPostmaster)
{
/*
* Create a PGPROC so we can use LWLocks. In the EXEC_BACKEND case,
* this was already done by SubPostmasterMain().
*/
#ifndef EXEC_BACKEND
InitAuxiliaryProcess();
#endif
/*
* Assign the ProcSignalSlot for an auxiliary process. Since it
* doesn't have a BackendId, the slot is statically allocated based on
* the auxiliary process type (auxType). Backends use slots indexed
* in the range from 1 to MaxBackends (inclusive), so we use
* MaxBackends + AuxProcType + 1 as the index of the slot for an
* auxiliary process.
*
* This will need rethinking if we ever want more than one of a
* particular auxiliary process type.
*/
ProcSignalInit(MaxBackends + auxType + 1);
/* finish setting up bufmgr.c */
InitBufferPoolBackend();
/* register a shutdown callback for LWLock cleanup */
on_shmem_exit(ShutdownAuxiliaryProcess, 0);
}
/*
* XLOG operations
*/
SetProcessingMode(NormalProcessing);
switch (auxType)
{
case CheckerProcess:
bootstrap_signals();
CheckerModeMain();
proc_exit(1); /* should never return */
case BootstrapProcess:
bootstrap_signals();
BootStrapXLOG();
StartupXLOG();
BootstrapModeMain();
proc_exit(1); /* should never return */
case StartupProcess:
/* don't set signals, startup process has its own agenda */
StartupProcessMain();
proc_exit(1); /* should never return */
case BgWriterProcess:
/* don't set signals, bgwriter has its own agenda */
BackgroundWriterMain();
proc_exit(1); /* should never return */
case WalWriterProcess:
/* don't set signals, walwriter has its own agenda */
InitXLOGAccess();
WalWriterMain();
proc_exit(1); /* should never return */
case WalReceiverProcess:
/* don't set signals, walreceiver has its own agenda */
WalReceiverMain();
proc_exit(1); /* should never return */
default:
elog(PANIC, "unrecognized process type: %d", auxType);
proc_exit(1);
}
}
/*
* In shared memory checker mode, all we really want to do is create shared
* memory and semaphores (just to prove we can do it with the current GUC
* settings).
*/
static void
CheckerModeMain(void)
{
/*
* We must be getting invoked for bootstrap mode
*/
Assert(!IsUnderPostmaster);
SetProcessingMode(BootstrapProcessing);
/*
* Do backend-like initialization for bootstrap mode
*/
InitProcess();
InitPostgres(NULL, InvalidOid, NULL, NULL);
proc_exit(0);
}
/*
* The main entry point for running the backend in bootstrap mode
*
* The bootstrap mode is used to initialize the template database.
* The bootstrap backend doesn't speak SQL, but instead expects
* commands in a special bootstrap language.
*/
static void
BootstrapModeMain(void)
{
int i;
Assert(!IsUnderPostmaster);
SetProcessingMode(BootstrapProcessing);
/*
* Do backend-like initialization for bootstrap mode
*/
InitProcess();
InitPostgres(NULL, InvalidOid, NULL, NULL);
/* Initialize stuff for bootstrap-file processing */
for (i = 0; i < MAXATTR; i++)
{
attrtypes[i] = NULL;
Nulls[i] = false;
}
/* * Process bootstrap input.
*/
boot_yyparse();
/*
* We should now know about all mapped relations, so it's okay to write
* out the initial relation mapping files.
*/
RelationMapFinishBootstrap();
/* Perform a checkpoint to ensure everything's down to disk */
SetProcessingMode(NormalProcessing);
CreateCheckPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_IMMEDIATE);
/* Clean up and exit */
cleanup();
proc_exit(0);
}
/* ----------------------------------------------------------------
* misc functions
* ----------------------------------------------------------------
*/
/*
* Set up signal handling for a bootstrap process
*/
static void
bootstrap_signals(void)
{
if (IsUnderPostmaster)
{
/*
* If possible, make this process a group leader, so that the
* postmaster can signal any child processes too.
*/
#ifdef HAVE_SETSID
if (setsid() < 0)
elog(FATAL, "setsid() failed: %m");
#endif
/*
* Properly accept or ignore signals the postmaster might send us
*/
pqsignal(SIGHUP, SIG_IGN);
pqsignal(SIGINT, SIG_IGN); /* ignore query-cancel */
pqsignal(SIGTERM, die);
pqsignal(SIGQUIT, quickdie);
pqsignal(SIGALRM, SIG_IGN);
pqsignal(SIGPIPE, SIG_IGN);
pqsignal(SIGUSR1, SIG_IGN);
pqsignal(SIGUSR2, SIG_IGN);
/*
* Reset some signals that are accepted by postmaster but not here
*/
pqsignal(SIGCHLD, SIG_DFL);
pqsignal(SIGTTIN, SIG_DFL);
pqsignal(SIGTTOU, SIG_DFL);
pqsignal(SIGCONT, SIG_DFL);
pqsignal(SIGWINCH, SIG_DFL);
/*
* Unblock signals (they were blocked when the postmaster forked us)
*/
PG_SETMASK(&UnBlockSig);
}
else
{ /* Set up appropriately for interactive use */
pqsignal(SIGHUP, die);
pqsignal(SIGINT, die);
pqsignal(SIGTERM, die);
pqsignal(SIGQUIT, die);
}
}
/*
* Begin shutdown of an auxiliary process. This is approximately the equivalent
* of ShutdownPostgres() in postinit.c. We can't run transactions in an
* auxiliary process, so most of the work of AbortTransaction() is not needed,
* but we do need to make sure we've released any LWLocks we are holding.
* (This is only critical during an error exit.)
*/
static void
ShutdownAuxiliaryProcess(int code, Datum arg)
{
LWLockReleaseAll();
}
/* ----------------------------------------------------------------
* MANUAL BACKEND INTERACTIVE INTERFACE COMMANDS
* ----------------------------------------------------------------
*/
/* ----------------
* boot_openrel
* ----------------
*/
void
boot_openrel(char *relname)
{
int i;
struct typmap **app;
Relation rel;
HeapScanDesc scan;
HeapTuple tup;
if (strlen(relname) >= NAMEDATALEN)
relname[NAMEDATALEN - 1] = '\0';
if (Typ == NULL)
{
/* We can now load the pg_type data */
rel = heap_open(TypeRelationId, NoLock);
scan = heap_beginscan(rel, SnapshotNow, 0, NULL);
i = 0;
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
++i;
heap_endscan(scan);
app = Typ = ALLOC(struct typmap *, i + 1);
while (i-- > 0)
*app++ = ALLOC(struct typmap, 1);
*app = NULL;
scan = heap_beginscan(rel, SnapshotNow, 0, NULL);
app = Typ;
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
{
(*app)->am_oid = HeapTupleGetOid(tup);
memcpy((char *) &(*app)->am_typ,
(char *) GETSTRUCT(tup),
sizeof((*app)->am_typ));
app++;
}
heap_endscan(scan);
heap_close(rel, NoLock);
}
if (boot_reldesc != NULL) closerel(NULL);
elog(DEBUG4, "open relation %s, attrsize %d",
relname, (int) ATTRIBUTE_FIXED_PART_SIZE);
boot_reldesc = heap_openrv(makeRangeVar(NULL, relname, -1), NoLock);
numattr = boot_reldesc->rd_rel->relnatts;
for (i = 0; i < numattr; i++)
{
if (attrtypes[i] == NULL)
attrtypes[i] = AllocateAttribute();
memmove((char *) attrtypes[i],
(char *) boot_reldesc->rd_att->attrs[i],
ATTRIBUTE_FIXED_PART_SIZE);
{
Form_pg_attribute at = attrtypes[i];
elog(DEBUG4, "create attribute %d name %s len %d num %d type %u",
i, NameStr(at->attname), at->attlen, at->attnum,
at->atttypid);
}
}
}
/* ----------------
* closerel
* ----------------
*/
void
closerel(char *name)
{
if (name)
{
if (boot_reldesc)
{
if (strcmp(RelationGetRelationName(boot_reldesc), name) != 0)
elog(ERROR, "close of %s when %s was expected",
name, RelationGetRelationName(boot_reldesc));
}
else
elog(ERROR, "close of %s before any relation was opened",
name);
}
if (boot_reldesc == NULL)
elog(ERROR, "no open relation to close");
else
{
elog(DEBUG4, "close relation %s",
RelationGetRelationName(boot_reldesc));
heap_close(boot_reldesc, NoLock);
boot_reldesc = NULL;
}
}
/* ----------------
* DEFINEATTR()
*
* define a <field,type> pair
* if there are n fields in a relation to be created, this routine
* will be called n times
* ----------------
*/
void
DefineAttr(char *name, char *type, int attnum)
{
Oid typeoid;
if (boot_reldesc != NULL)
{
elog(WARNING, "no open relations allowed with CREATE command");
closerel(NULL);
}
if (attrtypes[attnum] == NULL)
attrtypes[attnum] = AllocateAttribute();
MemSet(attrtypes[attnum], 0, ATTRIBUTE_FIXED_PART_SIZE);
namestrcpy(&attrtypes[attnum]->attname, name);
elog(DEBUG4, "column %s %s", NameStr(attrtypes[attnum]->attname), type);
attrtypes[attnum]->attnum = attnum + 1; /* fillatt */
typeoid = gettype(type);
if (Typ != NULL)
{
attrtypes[attnum]->atttypid = Ap->am_oid;
attrtypes[attnum]->attlen = Ap->am_typ.typlen;
attrtypes[attnum]->attbyval = Ap->am_typ.typbyval;
attrtypes[attnum]->attstorage = Ap->am_typ.typstorage;
attrtypes[attnum]->attalign = Ap->am_typ.typalign;
/* if an array type, assume 1-dimensional attribute */
if (Ap->am_typ.typelem != InvalidOid && Ap->am_typ.typlen < 0)
attrtypes[attnum]->attndims = 1;
else
attrtypes[attnum]->attndims = 0;
}
else
{
attrtypes[attnum]->atttypid = TypInfo[typeoid].oid;
attrtypes[attnum]->attlen = TypInfo[typeoid].len;
attrtypes[attnum]->attbyval = TypInfo[typeoid].byval;
attrtypes[attnum]->attstorage = TypInfo[typeoid].storage;
attrtypes[attnum]->attalign = TypInfo[typeoid].align;
/* if an array type, assume 1-dimensional attribute */
if (TypInfo[typeoid].elem != InvalidOid &&
attrtypes[attnum]->attlen < 0)
attrtypes[attnum]->attndims = 1;
else
attrtypes[attnum]->attndims = 0;
}
attrtypes[attnum]->attstattarget = -1;
attrtypes[attnum]->attcacheoff = -1;
attrtypes[attnum]->atttypmod = -1;
attrtypes[attnum]->attislocal = true;
/*
* Mark as "not null" if type is fixed-width and prior columns are too.
* This corresponds to case where column can be accessed directly via C
* struct declaration.
*
* oidvector and int2vector are also treated as not-nullable, even though
* they are no longer fixed-width.
*/
#define MARKNOTNULL(att) \
((att)->attlen > 0 || \
(att)->atttypid == OIDVECTOROID || \
(att)->atttypid == INT2VECTOROID)
if (MARKNOTNULL(attrtypes[attnum]))
{
int i;
for (i = 0; i < attnum; i++)
{
if (!MARKNOTNULL(attrtypes[i])) break;
}
if (i == attnum)
attrtypes[attnum]->attnotnull = true;
}
}
/* ----------------
* InsertOneTuple
*
* If objectid is not zero, it is a specific OID to assign to the tuple.
* Otherwise, an OID will be assigned (if necessary) by heap_insert.
* ----------------
*/
void
InsertOneTuple(Oid objectid)
{
HeapTuple tuple;
TupleDesc tupDesc;
int i;
elog(DEBUG4, "inserting row oid %u, %d columns", objectid, numattr);
tupDesc = CreateTupleDesc(numattr,
RelationGetForm(boot_reldesc)->relhasoids,
attrtypes);
tuple = heap_form_tuple(tupDesc, values, Nulls);
if (objectid != (Oid) 0)
HeapTupleSetOid(tuple, objectid);
pfree(tupDesc); /* just free's tupDesc, not the attrtypes */
simple_heap_insert(boot_reldesc, tuple);
heap_freetuple(tuple);
elog(DEBUG4, "row inserted");
/*
* Reset null markers for next tuple
*/
for (i = 0; i < numattr; i++)
Nulls[i] = false;
}
/* ----------------
* InsertOneValue
* ----------------
*/
void
InsertOneValue(char *value, int i)
{
Oid typoid;
int16 typlen;
bool typbyval;
char typalign;
char typdelim;
Oid typioparam;
Oid typinput;
Oid typoutput;
char *prt;
AssertArg(i >= 0 || i < MAXATTR);
elog(DEBUG4, "inserting column %d value \"%s\"", i, value);
typoid = boot_reldesc->rd_att->attrs[i]->atttypid;
boot_get_type_io_data(typoid,
&typlen, &typbyval, &typalign,
&typdelim, &typioparam,
&typinput, &typoutput);
values[i] = OidInputFunctionCall(typinput, value, typioparam, -1);
prt = OidOutputFunctionCall(typoutput, values[i]);
elog(DEBUG4, "inserted -> %s", prt);
pfree(prt);
}
/* ----------------
* InsertOneNull
* ----------------
*/
void
InsertOneNull(int i)
{
elog(DEBUG4, "inserting column %d NULL", i);
Assert(i >= 0 || i < MAXATTR);
values[i] = PointerGetDatum(NULL);
Nulls[i] = true;
}
/* ----------------
* cleanup
* ----------------
*/
static void
cleanup(void)
{
if (boot_reldesc != NULL)
closerel(NULL);
}
/* ----------------
* gettype
*
* NB: this is really ugly; it will return an integer index into TypInfo[],
* and not an OID at all, until the first reference to a type not known in
* TypInfo[]. At that point it will read and cache pg_type in the Typ array,
* and subsequently return a real OID (and set the global pointer Ap to
* point at the found row in Typ). So caller must check whether Typ is
* still NULL to determine what the return value is!
* ----------------
*/
static Oid
gettype(char *type)
{
int i;
Relation rel;
HeapScanDesc scan;
HeapTuple tup;
struct typmap **app;
if (Typ != NULL)
{
for (app = Typ; *app != NULL; app++)
{
if (strncmp(NameStr((*app)->am_typ.typname), type, NAMEDATALEN) == 0)
{
Ap = *app;
return (*app)->am_oid;
}
}
}
else
{
for (i = 0; i < n_types; i++)
{
if (strncmp(type, TypInfo[i].name, NAMEDATALEN) == 0)
return i;
}
elog(DEBUG4, "external type: %s", type); rel = heap_open(TypeRelationId, NoLock);
scan = heap_beginscan(rel, SnapshotNow, 0, NULL);
i = 0;
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
++i;
heap_endscan(scan);
app = Typ = ALLOC(struct typmap *, i + 1);
while (i-- > 0)
*app++ = ALLOC(struct typmap, 1);
*app = NULL;
scan = heap_beginscan(rel, SnapshotNow, 0, NULL);
app = Typ;
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
{
(*app)->am_oid = HeapTupleGetOid(tup);
memmove((char *) &(*app++)->am_typ,
(char *) GETSTRUCT(tup),
sizeof((*app)->am_typ));
}
heap_endscan(scan);
heap_close(rel, NoLock);
return gettype(type);
}
elog(ERROR, "unrecognized type \"%s\"", type);
/* not reached, here to make compiler happy */
return 0;
}
/* ----------------
* boot_get_type_io_data
*
* Obtain type I/O information at bootstrap time. This intentionally has
* almost the same API as lsyscache.c's get_type_io_data, except that
* we only support obtaining the typinput and typoutput routines, not
* the binary I/O routines. It is exported so that array_in and array_out
* can be made to work during early bootstrap.
* ----------------
*/
void
boot_get_type_io_data(Oid typid,
int16 *typlen,
bool *typbyval,
char *typalign,
char *typdelim,
Oid *typioparam,
Oid *typinput,
Oid *typoutput)
{
if (Typ != NULL)
{
/* We have the boot-time contents of pg_type, so use it */
struct typmap **app;
struct typmap *ap;
app = Typ;
while (*app && (*app)->am_oid != typid)
++app;
ap = *app;
if (ap == NULL)
elog(ERROR, "type OID %u not found in Typ list", typid);
*typlen = ap->am_typ.typlen;
*typbyval = ap->am_typ.typbyval;
*typalign = ap->am_typ.typalign;
*typdelim = ap->am_typ.typdelim;
/* XXX this logic must match getTypeIOParam() */
if (OidIsValid(ap->am_typ.typelem))
*typioparam = ap->am_typ.typelem;
else *typioparam = typid;
*typinput = ap->am_typ.typinput;
*typoutput = ap->am_typ.typoutput;
}
else
{
/* We don't have pg_type yet, so use the hard-wired TypInfo array */
int typeindex;
for (typeindex = 0; typeindex < n_types; typeindex++)
{
if (TypInfo[typeindex].oid == typid)
break;
}
if (typeindex >= n_types)
elog(ERROR, "type OID %u not found in TypInfo", typid);
*typlen = TypInfo[typeindex].len;
*typbyval = TypInfo[typeindex].byval;
*typalign = TypInfo[typeindex].align;
/* We assume typdelim is ',' for all boot-time types */
*typdelim = ',';
/* XXX this logic must match getTypeIOParam() */
if (OidIsValid(TypInfo[typeindex].elem))
*typioparam = TypInfo[typeindex].elem;
else
*typioparam = typid;
*typinput = TypInfo[typeindex].inproc;
*typoutput = TypInfo[typeindex].outproc;
}
}
/* ----------------
* AllocateAttribute
*
* Note: bootstrap never sets any per-column ACLs, so we only need
* ATTRIBUTE_FIXED_PART_SIZE space per attribute.
* ----------------
*/
static Form_pg_attribute
AllocateAttribute(void)
{
Form_pg_attribute attribute = (Form_pg_attribute) malloc(ATTRIBUTE_FIXED_PART_SIZE);
if (!PointerIsValid(attribute))
elog(FATAL, "out of memory");
MemSet(attribute, 0, ATTRIBUTE_FIXED_PART_SIZE);
return attribute;
}
/* ----------------
* MapArrayTypeName
* XXX arrays of "basetype" are always "_basetype".
* this is an evil hack inherited from rel. 3.1.
* XXX array dimension is thrown away because we
* don't support fixed-dimension arrays. again,
* sickness from 3.1.
*
* the string passed in must have a '[' character in it
*
* the string returned is a pointer to static storage and should NOT
* be freed by the CALLER.
* ----------------
*/
char *
MapArrayTypeName(char *s){
int i,
j;
static char newStr[NAMEDATALEN]; /* array type names < NAMEDATALEN long */
if (s == NULL || s[0] == '\0')
return s;
j = 1;
newStr[0] = '_';
for (i = 0; i < NAMEDATALEN - 1 && s[i] != '['; i++, j++)
newStr[j] = s[i];
newStr[j] = '\0';
return newStr;
}
/*
* index_register() -- record an index that has been set up for building
* later.
*
* At bootstrap time, we define a bunch of indexes on system catalogs.
* We postpone actually building the indexes until just before we're
* finished with initialization, however. This is because the indexes
* themselves have catalog entries, and those have to be included in the
* indexes on those catalogs. Doing it in two phases is the simplest
* way of making sure the indexes have the right contents at the end.
*/
void
index_register(Oid heap,
Oid ind,
IndexInfo *indexInfo)
{
IndexList *newind;
MemoryContext oldcxt;
/*
* XXX mao 10/31/92 -- don't gc index reldescs, associated info at
* bootstrap time. we'll declare the indexes now, but want to create them
* later.
*/
if (nogc == NULL)
nogc = AllocSetContextCreate(NULL,
"BootstrapNoGC",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
oldcxt = MemoryContextSwitchTo(nogc);
newind = (IndexList *) palloc(sizeof(IndexList));
newind->il_heap = heap;
newind->il_ind = ind;
newind->il_info = (IndexInfo *) palloc(sizeof(IndexInfo));
memcpy(newind->il_info, indexInfo, sizeof(IndexInfo));
/* expressions will likely be null, but may as well copy it */
newind->il_info->ii_Expressions = (List *)
copyObject(indexInfo->ii_Expressions);
newind->il_info->ii_ExpressionsState = NIL;
/* predicate will likely be null, but may as well copy it */
newind->il_info->ii_Predicate = (List *)
copyObject(indexInfo->ii_Predicate);
newind->il_info->ii_PredicateState = NIL;
/* no exclusion constraints at bootstrap time, so no need to copy */
Assert(indexInfo->ii_ExclusionOps == NULL);
Assert(indexInfo->ii_ExclusionProcs == NULL); Assert(indexInfo->ii_ExclusionStrats == NULL);
newind->il_next = ILHead;
ILHead = newind;
MemoryContextSwitchTo(oldcxt);
}
/*
* build_indices -- fill in all the indexes registered earlier
*/
void
build_indices(void)
{
for (; ILHead != NULL; ILHead = ILHead->il_next)
{
Relation heap;
Relation ind;
/* need not bother with locks during bootstrap */
heap = heap_open(ILHead->il_heap, NoLock);
ind = index_open(ILHead->il_ind, NoLock);
index_build(heap, ind, ILHead->il_info, false);
index_close(ind, NoLock);
heap_close(heap, NoLock);
}
}