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postgresql/src/backend/bootstrap/bootstrap.c

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/*-------------------------------------------------------------------------
*
* bootstrap.c
* routines to support running postgres in 'bootstrap' mode
* bootstrap mode is used to create the initial template database
*
* Portions Copyright (c) 1996-2024, 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 "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"
uint32 bootstrap_data_checksum_version = 0; /* No checksum */
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;
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 '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);
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();
CreateSharedMemoryAndSemaphores();
/*
* 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();
/*
* 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;
}
/*
* Process bootstrap input.
*/
StartTransactionCommand();
boot_yyparse();
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((char *) attrtypes[i],
(char *) 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]->attcacheoff = -1;
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);
}
}
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