/*-------------------------------------------------------------------------
*
* bootstrap . c
* routines to support running postgres in ' bootstrap ' mode
* bootstrap mode is used to create the initial template database
*
* Portions Copyright ( c ) 1996 - 2025 , PostgreSQL Global Development Group
* Portions Copyright ( c ) 1994 , Regents of the University of California
*
* IDENTIFICATION
* src / backend / bootstrap / bootstrap . c
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#include "postgres.h"
#include <unistd.h>
#include <signal.h>
#include "access/genam.h"
#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/tableam.h"
#include "access/toast_compression.h"
#include "access/xact.h"
#include "bootstrap/bootstrap.h"
#include "catalog/index.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "common/link-canary.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "pg_getopt.h"
#include "postmaster/postmaster.h"
#include "storage/bufpage.h"
#include "storage/ipc.h"
#include "storage/proc.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/relmapper.h"
static void CheckerModeMain(void );
static void bootstrap_signals(void );
static Form_pg_attribute AllocateAttribute(void );
static void populate_typ_list(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 filled , so it has to cover the datatypes used as column types
* in the core " bootstrapped " catalogs .
*
* 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 collation;
Oid inproc;
Oid outproc;
};
static const struct typinfo TypInfo[] = {
{"bool" , BOOLOID, 0 , 1 , true , TYPALIGN_CHAR, TYPSTORAGE_PLAIN, InvalidOid,
F_BOOLIN, F_BOOLOUT},
{"bytea" , BYTEAOID, 0 , -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, InvalidOid,
F_BYTEAIN, F_BYTEAOUT},
{"char" , CHAROID, 0 , 1 , true , TYPALIGN_CHAR, TYPSTORAGE_PLAIN, InvalidOid,
F_CHARIN, F_CHAROUT},
{"int2" , INT2OID, 0 , 2 , true , TYPALIGN_SHORT, TYPSTORAGE_PLAIN, InvalidOid,
F_INT2IN, F_INT2OUT},
{"int4" , INT4OID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_INT4IN, F_INT4OUT},
{"float4" , FLOAT4OID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_FLOAT4IN, F_FLOAT4OUT},
{"name" , NAMEOID, CHAROID, NAMEDATALEN, false , TYPALIGN_CHAR, TYPSTORAGE_PLAIN, C_COLLATION_OID,
F_NAMEIN, F_NAMEOUT},
{"regclass" , REGCLASSOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_REGCLASSIN, F_REGCLASSOUT},
{"regproc" , REGPROCOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_REGPROCIN, F_REGPROCOUT},
{"regtype" , REGTYPEOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_REGTYPEIN, F_REGTYPEOUT},
{"regrole" , REGROLEOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_REGROLEIN, F_REGROLEOUT},
{"regnamespace" , REGNAMESPACEOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_REGNAMESPACEIN, F_REGNAMESPACEOUT},
{"text" , TEXTOID, 0 , -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, DEFAULT_COLLATION_OID,
F_TEXTIN, F_TEXTOUT},
{"oid" , OIDOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_OIDIN, F_OIDOUT},
{"tid" , TIDOID, 0 , 6 , false , TYPALIGN_SHORT, TYPSTORAGE_PLAIN, InvalidOid,
F_TIDIN, F_TIDOUT},
{"xid" , XIDOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_XIDIN, F_XIDOUT},
{"cid" , CIDOID, 0 , 4 , true , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_CIDIN, F_CIDOUT},
{"pg_node_tree" , PG_NODE_TREEOID, 0 , -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, DEFAULT_COLLATION_OID,
F_PG_NODE_TREE_IN, F_PG_NODE_TREE_OUT},
{"int2vector" , INT2VECTOROID, INT2OID, -1 , false , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_INT2VECTORIN, F_INT2VECTOROUT},
{"oidvector" , OIDVECTOROID, OIDOID, -1 , false , TYPALIGN_INT, TYPSTORAGE_PLAIN, InvalidOid,
F_OIDVECTORIN, F_OIDVECTOROUT},
{"_int4" , INT4ARRAYOID, INT4OID, -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, InvalidOid,
F_ARRAY_IN, F_ARRAY_OUT},
{"_text" , 1009 , TEXTOID, -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, DEFAULT_COLLATION_OID,
F_ARRAY_IN, F_ARRAY_OUT},
{"_oid" , 1028 , OIDOID, -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, InvalidOid,
F_ARRAY_IN, F_ARRAY_OUT},
{"_char" , 1002 , CHAROID, -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, InvalidOid,
F_ARRAY_IN, F_ARRAY_OUT},
{"_aclitem" , 1034 , ACLITEMOID, -1 , false , TYPALIGN_INT, TYPSTORAGE_EXTENDED, InvalidOid,
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 List *Typ = NIL; /* List of struct typmap* */
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;
/*
* 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 ) . Since , in fact , that was already done by
* CreateSharedMemoryAndSemaphores ( ) , we have nothing more to do here .
*/
static void
CheckerModeMain(void )
{
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 .
*
* When check_only is true , startup is done only far enough to verify that
* the current configuration , particularly the passed in options pertaining
* to shared memory sizing , options work ( or at least do not cause an error
* up to shared memory creation ) .
*/
void
BootstrapModeMain(int argc, char *argv[], bool check_only)
{
int i;
char *progname = argv[0 ];
int flag;
char *userDoption = NULL;
uint32 bootstrap_data_checksum_version = 0 ; /* No checksum */
yyscan_t scanner;
Assert(!IsUnderPostmaster);
InitStandaloneProcess(argv[0 ]);
/* Set defaults, to be overridden by explicit options below */
InitializeGUCOptions();
/* an initial --boot or --check should be present */
Assert(argc > 1
&& (strcmp(argv[1 ], "--boot" ) == 0
|| strcmp(argv[1 ], "--check" ) == 0 ));
argv++;
argc--;
while ((flag = getopt(argc, argv, "B:c:d:D:Fkr:X:-:" )) != -1 )
{
switch (flag)
{
case 'B' :
SetConfigOption("shared_buffers" , optarg, PGC_POSTMASTER, PGC_S_ARGV);
break ;
case '-' :
/*
* Error if the user misplaced a special must - be - first option
* for dispatching to a subprogram . parse_dispatch_option ( )
* returns DISPATCH_POSTMASTER if it doesn ' t find a match , so
* error for anything else .
*/
if (parse_dispatch_option(optarg) != DISPATCH_POSTMASTER)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("--%s must be first argument" , optarg)));
/* FALLTHROUGH */
case 'c' :
{
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);
pfree(name);
pfree(value);
break ;
}
case 'D' :
userDoption = pstrdup(optarg);
break ;
case 'd' :
{
/* Turn on debugging for the bootstrap process. */
char *debugstr;
debugstr = psprintf("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 'k' :
bootstrap_data_checksum_version = PG_DATA_CHECKSUM_VERSION;
break ;
case 'r' :
strlcpy(OutputFileName, optarg, MAXPGPATH);
break ;
case 'X' :
SetConfigOption("wal_segment_size" , optarg, PGC_INTERNAL, PGC_S_DYNAMIC_DEFAULT);
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 );
}
/* Acquire configuration parameters */
if (!SelectConfigFiles(userDoption, progname))
proc_exit(1 );
/*
* Validate we have been given a reasonable - looking DataDir and change
* into it
*/
checkDataDir();
ChangeToDataDir();
CreateDataDirLockFile(false );
SetProcessingMode(BootstrapProcessing);
IgnoreSystemIndexes = true ;
InitializeMaxBackends();
/*
* Even though bootstrapping runs in single - process mode , initialize
* postmaster child slots array so that - - check can detect running out of
* shared memory or other resources if max_connections is set too high .
*/
InitPostmasterChildSlots();
InitializeFastPathLocks();
CreateSharedMemoryAndSemaphores();
/*
* Estimate number of openable files . This is essential too in - - check
* mode , because on some platforms semaphores count as open files .
*/
set_max_safe_fds();
/*
* XXX : It might make sense to move this into its own function at some
* point . Right now it seems like it ' d cause more code duplication than
* it ' s worth .
*/
if (check_only)
{
SetProcessingMode(NormalProcessing);
CheckerModeMain();
abort();
}
/*
* Do backend - like initialization for bootstrap mode
*/
InitProcess();
BaseInit();
bootstrap_signals();
BootStrapXLOG(bootstrap_data_checksum_version);
/*
* To ensure that src / common / link - canary . c is linked into the backend , we
* must call it from somewhere . Here is as good as anywhere .
*/
if (pg_link_canary_is_frontend())
elog(ERROR, "backend is incorrectly linked to frontend functions" );
InitPostgres(NULL, InvalidOid, NULL, InvalidOid, 0 , NULL);
/* Initialize stuff for bootstrap-file processing */
for (i = 0 ; i < MAXATTR; i++)
{
attrtypes[i] = NULL;
Nulls[i] = false ;
}
if (boot_yylex_init(&scanner) != 0 )
elog(ERROR, "yylex_init() failed: %m" );
/*
* Process bootstrap input .
*/
StartTransactionCommand();
boot_yyparse(scanner);
CommitTransactionCommand();
/*
* We should now know about all mapped relations , so it ' s okay to write
* out the initial relation mapping files .
*/
RelationMapFinishBootstrap();
/* Clean up and exit */
cleanup();
proc_exit(0 );
}
/* ----------------------------------------------------------------
* misc functions
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
/*
* Set up signal handling for a bootstrap process
*/
static void
bootstrap_signals(void )
{
Assert(!IsUnderPostmaster);
/*
* We don ' t actually need any non - default signal handling in bootstrap
* mode ; " curl up and die " is a sufficient response for all these cases .
* Let ' s set that handling explicitly , as documentation if nothing else .
*/
pqsignal(SIGHUP, SIG_DFL);
pqsignal(SIGINT, SIG_DFL);
pqsignal(SIGTERM, SIG_DFL);
pqsignal(SIGQUIT, SIG_DFL);
}
/* ----------------------------------------------------------------
* MANUAL BACKEND INTERACTIVE INTERFACE COMMANDS
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
/* ----------------
* boot_openrel
*
* Execute BKI OPEN command .
* - - - - - - - - - - - - - - - -
*/
void
boot_openrel(char *relname)
{
int i;
if (strlen(relname) >= NAMEDATALEN)
relname[NAMEDATALEN - 1 ] = '\0' ;
/*
* pg_type must be filled before any OPEN command is executed , hence we
* can now populate Typ if we haven ' t yet .
*/
if (Typ == NIL)
populate_typ_list();
if (boot_reldesc != NULL)
closerel(NULL);
elog(DEBUG4, "open relation %s, attrsize %d" ,
relname, (int ) ATTRIBUTE_FIXED_PART_SIZE);
boot_reldesc = table_openrv(makeRangeVar(NULL, relname, -1 ), NoLock);
numattr = RelationGetNumberOfAttributes(boot_reldesc);
for (i = 0 ; i < numattr; i++)
{
if (attrtypes[i] == NULL)
attrtypes[i] = AllocateAttribute();
memmove(attrtypes[i],
TupleDescAttr(boot_reldesc->rd_att, 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 *relname)
{
if (relname)
{
if (boot_reldesc)
{
if (strcmp(RelationGetRelationName(boot_reldesc), relname) != 0 )
elog(ERROR, "close of %s when %s was expected" ,
relname, RelationGetRelationName(boot_reldesc));
}
else
elog(ERROR, "close of %s before any relation was opened" ,
relname);
}
if (boot_reldesc == NULL)
elog(ERROR, "no open relation to close" );
else
{
elog(DEBUG4, "close relation %s" ,
RelationGetRelationName(boot_reldesc));
table_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, int nullness)
{
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 ;
typeoid = gettype(type);
if (Typ != NIL)
{
attrtypes[attnum]->atttypid = Ap->am_oid;
attrtypes[attnum]->attlen = Ap->am_typ.typlen;
attrtypes[attnum]->attbyval = Ap->am_typ.typbyval;
attrtypes[attnum]->attalign = Ap->am_typ.typalign;
attrtypes[attnum]->attstorage = Ap->am_typ.typstorage;
attrtypes[attnum]->attcompression = InvalidCompressionMethod;
attrtypes[attnum]->attcollation = Ap->am_typ.typcollation;
/* 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]->attalign = TypInfo[typeoid].align;
attrtypes[attnum]->attstorage = TypInfo[typeoid].storage;
attrtypes[attnum]->attcompression = InvalidCompressionMethod;
attrtypes[attnum]->attcollation = TypInfo[typeoid].collation;
/* 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 ;
}
/*
* If a system catalog column is collation - aware , force it to use C
* collation , so that its behavior is independent of the database ' s
* collation . This is essential to allow template0 to be cloned with a
* different database collation .
*/
if (OidIsValid(attrtypes[attnum]->attcollation))
attrtypes[attnum]->attcollation = C_COLLATION_OID;
attrtypes[attnum]->atttypmod = -1 ;
attrtypes[attnum]->attislocal = true ;
if (nullness == BOOTCOL_NULL_FORCE_NOT_NULL)
{
attrtypes[attnum]->attnotnull = true ;
}
else if (nullness == BOOTCOL_NULL_FORCE_NULL)
{
attrtypes[attnum]->attnotnull = false ;
}
else
{
Assert(nullness == BOOTCOL_NULL_AUTO);
/*
* Mark as " not null " if type is fixed - width and prior columns are
* likewise fixed - width and not - null . This corresponds to case where
* column can be accessed directly via C struct declaration .
*/
if (attrtypes[attnum]->attlen > 0 )
{
int i;
/* check earlier attributes */
for (i = 0 ; i < attnum; i++)
{
if (attrtypes[i]->attlen <= 0 ||
!attrtypes[i]->attnotnull)
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(void )
{
HeapTuple tuple;
TupleDesc tupDesc;
int i;
elog(DEBUG4, "inserting row with %d columns" , numattr);
tupDesc = CreateTupleDesc(numattr, attrtypes);
tuple = heap_form_tuple(tupDesc, values, Nulls);
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;
Assert(i >= 0 && i < MAXATTR);
elog(DEBUG4, "inserting column %d value \" %s\"" , i, value);
typoid = TupleDescAttr(boot_reldesc->rd_att, i)->atttypid;
boot_get_type_io_data(typoid,
&typlen, &typbyval, &typalign,
&typdelim, &typioparam,
&typinput, &typoutput);
values[i] = OidInputFunctionCall(typinput, value, typioparam, -1 );
/*
* We use ereport not elog here so that parameters aren ' t evaluated unless
* the message is going to be printed , which generally it isn ' t
*/
ereport(DEBUG4,
(errmsg_internal("inserted -> %s" ,
OidOutputFunctionCall(typoutput, values[i]))));
}
/* ----------------
* InsertOneNull
* - - - - - - - - - - - - - - - -
*/
void
InsertOneNull(int i)
{
elog(DEBUG4, "inserting column %d NULL" , i);
Assert(i >= 0 && i < MAXATTR);
if (TupleDescAttr(boot_reldesc->rd_att, i)->attnotnull)
elog(ERROR,
"NULL value specified for not-null column \" %s\" of relation \" %s\"" ,
NameStr(TupleDescAttr(boot_reldesc->rd_att, i)->attname),
RelationGetRelationName(boot_reldesc));
values[i] = PointerGetDatum(NULL);
Nulls[i] = true ;
}
/* ----------------
* cleanup
* - - - - - - - - - - - - - - - -
*/
static void
cleanup(void )
{
if (boot_reldesc != NULL)
closerel(NULL);
}
/* ----------------
* populate_typ_list
*
* Load the Typ list by reading pg_type .
* - - - - - - - - - - - - - - - -
*/
static void
populate_typ_list(void )
{
Relation rel;
TableScanDesc scan;
HeapTuple tup;
MemoryContext old;
Assert(Typ == NIL);
rel = table_open(TypeRelationId, NoLock);
scan = table_beginscan_catalog(rel, 0 , NULL);
old = MemoryContextSwitchTo(TopMemoryContext);
while ((tup = heap_getnext(scan, ForwardScanDirection)) != NULL)
{
Form_pg_type typForm = (Form_pg_type) GETSTRUCT(tup);
struct typmap *newtyp;
newtyp = (struct typmap *) palloc(sizeof (struct typmap));
Typ = lappend(Typ, newtyp);
newtyp->am_oid = typForm->oid;
memcpy(&newtyp->am_typ, typForm, sizeof (newtyp->am_typ));
}
MemoryContextSwitchTo(old);
table_endscan(scan);
table_close(rel, NoLock);
}
/* ----------------
* 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 Typ ,
* 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 NIL to determine what the return value is !
* - - - - - - - - - - - - - - - -
*/
static Oid
gettype(char *type)
{
if (Typ != NIL)
{
ListCell *lc;
foreach(lc, Typ)
{
struct typmap *app = lfirst(lc);
if (strncmp(NameStr(app->am_typ.typname), type, NAMEDATALEN) == 0 )
{
Ap = app;
return app->am_oid;
}
}
/*
* The type wasn ' t known ; reload the pg_type contents and check again
* to handle composite types , added since last populating the list .
*/
list_free_deep(Typ);
Typ = NIL;
populate_typ_list();
/*
* Calling gettype would result in infinite recursion for types
* missing in pg_type , so just repeat the lookup .
*/
foreach(lc, Typ)
{
struct typmap *app = lfirst(lc);
if (strncmp(NameStr(app->am_typ.typname), type, NAMEDATALEN) == 0 )
{
Ap = app;
return app->am_oid;
}
}
}
else
{
int i;
for (i = 0 ; i < n_types; i++)
{
if (strncmp(type, TypInfo[i].name, NAMEDATALEN) == 0 )
return i;
}
/* Not in TypInfo, so we'd better be able to read pg_type now */
elog(DEBUG4, "external type: %s" , type);
populate_typ_list();
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 != NIL)
{
/* We have the boot-time contents of pg_type, so use it */
struct typmap *ap = NULL;
ListCell *lc;
foreach(lc, Typ)
{
ap = lfirst(lc);
if (ap->am_oid == typid)
break ;
}
if (!ap || ap->am_oid != typid)
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 )
{
return (Form_pg_attribute)
MemoryContextAllocZero(TopMemoryContext, ATTRIBUTE_FIXED_PART_SIZE);
}
/*
* 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,
const 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_SIZES);
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 =
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 =
copyObject(indexInfo->ii_Predicate);
newind->il_info->ii_PredicateState = NULL;
/* 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 = table_open(ILHead->il_heap, NoLock);
ind = index_open(ILHead->il_ind, NoLock);
index_build(heap, ind, ILHead->il_info, false , false );
index_close(ind, NoLock);
table_close(heap, NoLock);
}
}
Messung V0.5 in Prozent C=93 H=95 G=93
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-08-08)
¤
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