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15386281a62071f322155b74cb32c2fea92e8350
postgres/src/backend/bootstrap/bootparse.y
Heikki Linnakangas 15386281a6 Put back allow_system_table_mods check in heap_create(). 
This reverts commit a475c60367.

Erik Rijkers reported back in January 2013 that after the patch, if you do
"pg_dump -t myschema.mytable" to dump a single table, and restore that in
a database where myschema does not exist, the table is silently created in
pg_catalog instead. That is because pg_dump uses
"SET search_path=myschema, pg_catalog" to set schema the table is created
in. While allow_system_table_mods is not a very elegant solution to this,
we can't leave it as it is, so for now, revert it back to the way it was
previously.
2013-06-03 17:22:31 +03:00

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%{
/*-------------------------------------------------------------------------
*
* bootparse.y
* yacc grammar for the "bootstrap" mode (BKI file format)
*
* Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/bootstrap/bootparse.y
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <unistd.h>
#include "access/attnum.h"
#include "access/htup.h"
#include "access/itup.h"
#include "access/skey.h"
#include "access/tupdesc.h"
#include "access/xact.h"
#include "bootstrap/bootstrap.h"
#include "catalog/catalog.h"
#include "catalog/heap.h"
#include "catalog/pg_am.h"
#include "catalog/pg_attribute.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_class.h"
#include "catalog/pg_namespace.h"
#include "catalog/pg_tablespace.h"
#include "catalog/toasting.h"
#include "commands/defrem.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodes.h"
#include "nodes/parsenodes.h"
#include "nodes/pg_list.h"
#include "nodes/primnodes.h"
#include "rewrite/prs2lock.h"
#include "storage/block.h"
#include "storage/fd.h"
#include "storage/ipc.h"
#include "storage/itemptr.h"
#include "storage/off.h"
#include "storage/smgr.h"
#include "tcop/dest.h"
#include "utils/rel.h"
#define atooid(x) ((Oid) strtoul((x), NULL, 10))
/*
* Bison doesn't allocate anything that needs to live across parser calls,
* so we can easily have it use palloc instead of malloc. This prevents
* memory leaks if we error out during parsing. Note this only works with
* bison >= 2.0. However, in bison 1.875 the default is to use alloca()
* if possible, so there's not really much problem anyhow, at least if
* you're building with gcc.
*/
#define YYMALLOC palloc
#define YYFREE pfree
static void
do_start(void)
{
StartTransactionCommand();
elog(DEBUG4, "start transaction");
}
static void
do_end(void)
{
CommitTransactionCommand();
elog(DEBUG4, "commit transaction");
CHECK_FOR_INTERRUPTS(); /* allow SIGINT to kill bootstrap run */
if (isatty(0))
{
printf("bootstrap> ");
fflush(stdout);
}
}
static int num_columns_read = 0;
%}
%expect 0
%name-prefix="boot_yy"
%union
{
List *list;
IndexElem *ielem;
char *str;
int ival;
Oid oidval;
}
%type <list> boot_index_params
%type <ielem> boot_index_param
%type <str> boot_const boot_ident
%type <ival> optbootstrap optsharedrelation optwithoutoids
%type <oidval> oidspec optoideq optrowtypeoid
%token <str> CONST_P ID
%token OPEN XCLOSE XCREATE INSERT_TUPLE
%token XDECLARE INDEX ON USING XBUILD INDICES UNIQUE XTOAST
%token COMMA EQUALS LPAREN RPAREN
%token OBJ_ID XBOOTSTRAP XSHARED_RELATION XWITHOUT_OIDS XROWTYPE_OID NULLVAL
%start TopLevel
%nonassoc low
%nonassoc high
%%
TopLevel:
Boot_Queries
|
;
Boot_Queries:
Boot_Query
| Boot_Queries Boot_Query
;
Boot_Query :
Boot_OpenStmt
| Boot_CloseStmt
| Boot_CreateStmt
| Boot_InsertStmt
| Boot_DeclareIndexStmt
| Boot_DeclareUniqueIndexStmt
| Boot_DeclareToastStmt
| Boot_BuildIndsStmt
;
Boot_OpenStmt:
OPEN boot_ident
{
do_start();
boot_openrel($2);
do_end();
}
;
Boot_CloseStmt:
XCLOSE boot_ident %prec low
{
do_start();
closerel($2);
do_end();
}
| XCLOSE %prec high
{
do_start();
closerel(NULL);
do_end();
}
;
Boot_CreateStmt:
XCREATE boot_ident oidspec optbootstrap optsharedrelation optwithoutoids optrowtypeoid LPAREN
{
do_start();
numattr = 0;
elog(DEBUG4, "creating%s%s relation %s %u",
$4 ? " bootstrap" : "",
$5 ? " shared" : "",
$2,
$3);
}
boot_column_list
{
do_end();
}
RPAREN
{
TupleDesc tupdesc;
bool shared_relation;
bool mapped_relation;
do_start();
tupdesc = CreateTupleDesc(numattr, !($6), attrtypes);
shared_relation = $5;
/*
* The catalogs that use the relation mapper are the
* bootstrap catalogs plus the shared catalogs. If this
* ever gets more complicated, we should invent a BKI
* keyword to mark the mapped catalogs, but for now a
* quick hack seems the most appropriate thing. Note in
* particular that all "nailed" heap rels (see formrdesc
* in relcache.c) must be mapped.
*/
mapped_relation = ($4 || shared_relation);
if ($4)
{
if (boot_reldesc)
{
elog(DEBUG4, "create bootstrap: warning, open relation exists, closing first");
closerel(NULL);
}
boot_reldesc = heap_create($2,
PG_CATALOG_NAMESPACE,
shared_relation ? GLOBALTABLESPACE_OID : 0,
$3,
InvalidOid,
tupdesc,
RELKIND_RELATION,
RELPERSISTENCE_PERMANENT,
shared_relation,
mapped_relation,
true);
elog(DEBUG4, "bootstrap relation created");
}
else
{
Oid id;
id = heap_create_with_catalog($2,
PG_CATALOG_NAMESPACE,
shared_relation ? GLOBALTABLESPACE_OID : 0,
$3,
$7,
InvalidOid,
BOOTSTRAP_SUPERUSERID,
tupdesc,
NIL,
RELKIND_RELATION,
RELPERSISTENCE_PERMANENT,
shared_relation,
mapped_relation,
true,
0,
ONCOMMIT_NOOP,
(Datum) 0,
false,
true,
false);
elog(DEBUG4, "relation created with OID %u", id);
}
do_end();
}
;
Boot_InsertStmt:
INSERT_TUPLE optoideq
{
do_start();
if ($2)
elog(DEBUG4, "inserting row with oid %u", $2);
else
elog(DEBUG4, "inserting row");
num_columns_read = 0;
}
LPAREN boot_column_val_list RPAREN
{
if (num_columns_read != numattr)
elog(ERROR, "incorrect number of columns in row (expected %d, got %d)",
numattr, num_columns_read);
if (boot_reldesc == NULL)
elog(FATAL, "relation not open");
InsertOneTuple($2);
do_end();
}
;
Boot_DeclareIndexStmt:
XDECLARE INDEX boot_ident oidspec ON boot_ident USING boot_ident LPAREN boot_index_params RPAREN
{
IndexStmt *stmt = makeNode(IndexStmt);
do_start();
stmt->idxname = $3;
stmt->relation = makeRangeVar(NULL, $6, -1);
stmt->accessMethod = $8;
stmt->tableSpace = NULL;
stmt->indexParams = $10;
stmt->options = NIL;
stmt->whereClause = NULL;
stmt->excludeOpNames = NIL;
stmt->idxcomment = NULL;
stmt->indexOid = InvalidOid;
stmt->oldNode = InvalidOid;
stmt->unique = false;
stmt->primary = false;
stmt->isconstraint = false;
stmt->deferrable = false;
stmt->initdeferred = false;
stmt->concurrent = false;
DefineIndex(stmt,
$4,
false,
false,
true, /* skip_build */
false);
do_end();
}
;
Boot_DeclareUniqueIndexStmt:
XDECLARE UNIQUE INDEX boot_ident oidspec ON boot_ident USING boot_ident LPAREN boot_index_params RPAREN
{
IndexStmt *stmt = makeNode(IndexStmt);
do_start();
stmt->idxname = $4;
stmt->relation = makeRangeVar(NULL, $7, -1);
stmt->accessMethod = $9;
stmt->tableSpace = NULL;
stmt->indexParams = $11;
stmt->options = NIL;
stmt->whereClause = NULL;
stmt->excludeOpNames = NIL;
stmt->idxcomment = NULL;
stmt->indexOid = InvalidOid;
stmt->oldNode = InvalidOid;
stmt->unique = true;
stmt->primary = false;
stmt->isconstraint = false;
stmt->deferrable = false;
stmt->initdeferred = false;
stmt->concurrent = false;
DefineIndex(stmt,
$5,
false,
false,
true, /* skip_build */
false);
do_end();
}
;
Boot_DeclareToastStmt:
XDECLARE XTOAST oidspec oidspec ON boot_ident
{
do_start();
BootstrapToastTable($6, $3, $4);
do_end();
}
;
Boot_BuildIndsStmt:
XBUILD INDICES
{
do_start();
build_indices();
do_end();
}
;
boot_index_params:
boot_index_params COMMA boot_index_param { $$ = lappend($1, $3); }
| boot_index_param { $$ = list_make1($1); }
;
boot_index_param:
boot_ident boot_ident
{
IndexElem *n = makeNode(IndexElem);
n->name = $1;
n->expr = NULL;
n->indexcolname = NULL;
n->collation = NIL;
n->opclass = list_make1(makeString($2));
n->ordering = SORTBY_DEFAULT;
n->nulls_ordering = SORTBY_NULLS_DEFAULT;
$$ = n;
}
;
optbootstrap:
XBOOTSTRAP { $$ = 1; }
| { $$ = 0; }
;
optsharedrelation:
XSHARED_RELATION { $$ = 1; }
| { $$ = 0; }
;
optwithoutoids:
XWITHOUT_OIDS { $$ = 1; }
| { $$ = 0; }
;
optrowtypeoid:
XROWTYPE_OID oidspec { $$ = $2; }
| { $$ = InvalidOid; }
;
boot_column_list:
boot_column_def
| boot_column_list COMMA boot_column_def
;
boot_column_def:
boot_ident EQUALS boot_ident
{
if (++numattr > MAXATTR)
elog(FATAL, "too many columns");
DefineAttr($1, $3, numattr-1);
}
;
oidspec:
boot_ident { $$ = atooid($1); }
;
optoideq:
OBJ_ID EQUALS oidspec { $$ = $3; }
| { $$ = InvalidOid; }
;
boot_column_val_list:
boot_column_val
| boot_column_val_list boot_column_val
| boot_column_val_list COMMA boot_column_val
;
boot_column_val:
boot_ident
{ InsertOneValue($1, num_columns_read++); }
| boot_const
{ InsertOneValue($1, num_columns_read++); }
| NULLVAL
{ InsertOneNull(num_columns_read++); }
;
boot_const :
CONST_P { $$ = yylval.str; }
;
boot_ident :
ID { $$ = yylval.str; }
;
%%
#include "bootscanner.c"
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