mirror of https://github.com/postgres/postgres
This is the first cut toward CREATE CONVERSION/DROP CONVERSION implementaion. The commands can now add/remove tuples to the new pg_conversion system catalog, but that's all. Still need work to make them actually working. Documentations, regression tests also need work.REL7_3_STABLE
Tatsuo Ishii
24 years ago
parent
f2bb1cfa85
commit
fcc962566a
@ -0,0 +1,249 @@ |
|||||||
|
/*-------------------------------------------------------------------------
|
||||||
|
* |
||||||
|
* pg_conversion.c |
||||||
|
* routines to support manipulation of the pg_conversion relation |
||||||
|
* |
||||||
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||||
|
* Portions Copyright (c) 1994, Regents of the University of California |
||||||
|
* |
||||||
|
* |
||||||
|
* IDENTIFICATION |
||||||
|
* $Header: /cvsroot/pgsql/src/backend/catalog/pg_conversion.c,v 1.1 2002/07/11 07:39:27 ishii Exp $ |
||||||
|
* |
||||||
|
*------------------------------------------------------------------------- |
||||||
|
*/ |
||||||
|
#include "postgres.h" |
||||||
|
|
||||||
|
#include "access/heapam.h" |
||||||
|
#include "catalog/catname.h" |
||||||
|
#include "catalog/indexing.h" |
||||||
|
#include "catalog/pg_conversion.h" |
||||||
|
#include "catalog/namespace.h" |
||||||
|
#include "utils/builtins.h" |
||||||
|
#include "utils/syscache.h" |
||||||
|
#include "mb/pg_wchar.h" |
||||||
|
#include "utils/fmgroids.h" |
||||||
|
#include "utils/acl.h" |
||||||
|
#include "miscadmin.h" |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* ConversionCreate |
||||||
|
* --------------- |
||||||
|
*/ |
||||||
|
Oid ConversionCreate(const char *conname, Oid connamespace, |
||||||
|
int32 conowner, |
||||||
|
int4 conforencoding, int4 contoencoding, |
||||||
|
Oid conproc, bool def) |
||||||
|
{ |
||||||
|
int i; |
||||||
|
Relation rel; |
||||||
|
TupleDesc tupDesc; |
||||||
|
HeapTuple tup; |
||||||
|
char nulls[Natts_pg_conversion]; |
||||||
|
Datum values[Natts_pg_conversion]; |
||||||
|
NameData cname; |
||||||
|
Oid oid; |
||||||
|
|
||||||
|
/* sanity checks */ |
||||||
|
if (!conname) |
||||||
|
elog(ERROR, "no conversion name supplied"); |
||||||
|
|
||||||
|
/* make sure there is no existing conversion of same name */ |
||||||
|
if (SearchSysCacheExists(CONNAMESP, |
||||||
|
PointerGetDatum(conname), |
||||||
|
ObjectIdGetDatum(connamespace), |
||||||
|
0,0)) |
||||||
|
elog(ERROR, "conversion name \"%s\" already exists", conname); |
||||||
|
|
||||||
|
if (def) |
||||||
|
{ |
||||||
|
/* make sure there is no existing default
|
||||||
|
<for encoding><to encoding> pair in this name space */ |
||||||
|
if (FindDefaultConversion(connamespace, |
||||||
|
conforencoding, |
||||||
|
contoencoding)) |
||||||
|
elog(ERROR, "default conversion for %s to %s already exists", |
||||||
|
pg_encoding_to_char(conforencoding),pg_encoding_to_char(contoencoding)); |
||||||
|
} |
||||||
|
|
||||||
|
/* open pg_conversion */ |
||||||
|
rel = heap_openr(ConversionRelationName, RowExclusiveLock); |
||||||
|
tupDesc = rel->rd_att; |
||||||
|
|
||||||
|
/* initialize nulls and values */ |
||||||
|
for (i = 0; i < Natts_pg_conversion; i++) |
||||||
|
{ |
||||||
|
nulls[i] = ' '; |
||||||
|
values[i] = (Datum) NULL; |
||||||
|
} |
||||||
|
|
||||||
|
/* form a tuple */ |
||||||
|
namestrcpy(&cname, conname); |
||||||
|
values[Anum_pg_conversion_conname - 1] = NameGetDatum(&cname); |
||||||
|
values[Anum_pg_conversion_connamespace - 1] = ObjectIdGetDatum(connamespace); |
||||||
|
values[Anum_pg_conversion_conowner - 1] = Int32GetDatum(conowner); |
||||||
|
values[Anum_pg_conversion_conforencoding - 1] = Int32GetDatum(conforencoding); |
||||||
|
values[Anum_pg_conversion_contoencoding - 1] = Int32GetDatum(contoencoding); |
||||||
|
values[Anum_pg_conversion_conproc - 1] = ObjectIdGetDatum(conproc); |
||||||
|
values[Anum_pg_conversion_condefault - 1] = BoolGetDatum(def); |
||||||
|
|
||||||
|
tup = heap_formtuple(tupDesc, values, nulls); |
||||||
|
|
||||||
|
/* insert a new tuple */ |
||||||
|
oid = simple_heap_insert(rel, tup); |
||||||
|
Assert(OidIsValid(oid)); |
||||||
|
|
||||||
|
/* update the index if any */ |
||||||
|
if (RelationGetForm(rel)->relhasindex) |
||||||
|
{ |
||||||
|
Relation idescs[Num_pg_conversion_indices]; |
||||||
|
|
||||||
|
CatalogOpenIndices(Num_pg_conversion_indices, Name_pg_conversion_indices, idescs); |
||||||
|
CatalogIndexInsert(idescs, Num_pg_conversion_indices, rel, tup); |
||||||
|
CatalogCloseIndices(Num_pg_conversion_indices, idescs); |
||||||
|
} |
||||||
|
|
||||||
|
heap_close(rel, RowExclusiveLock); |
||||||
|
|
||||||
|
return oid; |
||||||
|
} |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* ConversionDrop |
||||||
|
* --------------- |
||||||
|
*/ |
||||||
|
void ConversionDrop(const char *conname, Oid connamespace, int32 conowner) |
||||||
|
{ |
||||||
|
Relation rel; |
||||||
|
TupleDesc tupDesc; |
||||||
|
HeapTuple tuple; |
||||||
|
HeapScanDesc scan; |
||||||
|
ScanKeyData scanKeyData; |
||||||
|
Form_pg_conversion body; |
||||||
|
|
||||||
|
/* sanity checks */ |
||||||
|
if (!conname) |
||||||
|
elog(ERROR, "no conversion name supplied"); |
||||||
|
|
||||||
|
ScanKeyEntryInitialize(&scanKeyData, |
||||||
|
0, |
||||||
|
Anum_pg_conversion_connamespace, |
||||||
|
F_OIDEQ, |
||||||
|
ObjectIdGetDatum(connamespace)); |
||||||
|
|
||||||
|
/* open pg_conversion */ |
||||||
|
rel = heap_openr(ConversionRelationName, RowExclusiveLock); |
||||||
|
tupDesc = rel->rd_att; |
||||||
|
|
||||||
|
scan = heap_beginscan(rel, SnapshotNow, |
||||||
|
1, &scanKeyData); |
||||||
|
|
||||||
|
/* search for the target tuple */ |
||||||
|
while (HeapTupleIsValid(tuple = heap_getnext(scan, ForwardScanDirection))) |
||||||
|
{ |
||||||
|
body = (Form_pg_conversion)GETSTRUCT(tuple); |
||||||
|
if (!strncmp(NameStr(body->conname), conname, NAMEDATALEN)) |
||||||
|
break; |
||||||
|
} |
||||||
|
|
||||||
|
if (!HeapTupleIsValid(tuple)) |
||||||
|
{ |
||||||
|
elog(ERROR, "conversion %s not found", conname); |
||||||
|
return; |
||||||
|
} |
||||||
|
|
||||||
|
if (!superuser() && ((Form_pg_conversion)GETSTRUCT(tuple))->conowner != GetUserId()) |
||||||
|
elog(ERROR, "permission denied"); |
||||||
|
|
||||||
|
simple_heap_delete(rel, &tuple->t_self); |
||||||
|
|
||||||
|
heap_endscan(scan); |
||||||
|
heap_close(rel, RowExclusiveLock); |
||||||
|
} |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* FindDefaultConversion |
||||||
|
* |
||||||
|
* find default conversion proc by for_encoding and to_encoding in this name space |
||||||
|
* --------------- |
||||||
|
*/ |
||||||
|
Oid FindDefaultConversion(Oid name_space, int4 for_encoding, int4 to_encoding) |
||||||
|
{ |
||||||
|
Relation rel; |
||||||
|
HeapScanDesc scan; |
||||||
|
ScanKeyData scanKeyData; |
||||||
|
HeapTuple tuple; |
||||||
|
Form_pg_conversion body; |
||||||
|
Oid proc = InvalidOid; |
||||||
|
|
||||||
|
/* Check we have usage rights in target namespace */ |
||||||
|
if (pg_namespace_aclcheck(name_space, GetUserId(), ACL_USAGE) != ACLCHECK_OK) |
||||||
|
return InvalidOid; |
||||||
|
|
||||||
|
ScanKeyEntryInitialize(&scanKeyData, |
||||||
|
0, |
||||||
|
Anum_pg_conversion_connamespace, |
||||||
|
F_OIDEQ, |
||||||
|
ObjectIdGetDatum(name_space)); |
||||||
|
|
||||||
|
rel = heap_openr(ConversionRelationName, AccessShareLock); |
||||||
|
scan = heap_beginscan(rel, SnapshotNow, |
||||||
|
1, &scanKeyData); |
||||||
|
|
||||||
|
while (HeapTupleIsValid(tuple = heap_getnext(scan, ForwardScanDirection))) |
||||||
|
{ |
||||||
|
body = (Form_pg_conversion)GETSTRUCT(tuple); |
||||||
|
if (body->conforencoding == for_encoding && |
||||||
|
body->conforencoding == to_encoding && |
||||||
|
body->condefault == TRUE) { |
||||||
|
proc = body->conproc; |
||||||
|
break; |
||||||
|
} |
||||||
|
} |
||||||
|
heap_endscan(scan); |
||||||
|
heap_close(rel, AccessShareLock); |
||||||
|
return proc; |
||||||
|
} |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* FindConversionByName |
||||||
|
* |
||||||
|
* find conversion proc by possibly qualified conversion name. |
||||||
|
* --------------- |
||||||
|
*/ |
||||||
|
Oid FindConversionByName(List *name) |
||||||
|
{ |
||||||
|
HeapTuple tuple; |
||||||
|
char *conversion_name; |
||||||
|
Oid namespaceId; |
||||||
|
Oid procoid; |
||||||
|
AclResult aclresult; |
||||||
|
|
||||||
|
/* Convert list of names to a name and namespace */ |
||||||
|
namespaceId = QualifiedNameGetCreationNamespace(name, &conversion_name); |
||||||
|
|
||||||
|
/* Check we have usage rights in target namespace */ |
||||||
|
if (pg_namespace_aclcheck(namespaceId, GetUserId(), ACL_USAGE) != ACLCHECK_OK) |
||||||
|
return InvalidOid; |
||||||
|
|
||||||
|
/* search pg_conversion by namespaceId and conversion name */ |
||||||
|
tuple = SearchSysCache(CONNAMESP, |
||||||
|
PointerGetDatum(conversion_name), |
||||||
|
ObjectIdGetDatum(namespaceId), |
||||||
|
0,0); |
||||||
|
|
||||||
|
if (!HeapTupleIsValid(tuple)) |
||||||
|
return InvalidOid; |
||||||
|
|
||||||
|
procoid = ((Form_pg_conversion)GETSTRUCT(tuple))->conproc; |
||||||
|
|
||||||
|
ReleaseSysCache(tuple); |
||||||
|
|
||||||
|
/* Check we have execute rights for the function */ |
||||||
|
aclresult = pg_proc_aclcheck(procoid, GetUserId(), ACL_EXECUTE); |
||||||
|
if (aclresult != ACLCHECK_OK) |
||||||
|
return InvalidOid; |
||||||
|
|
||||||
|
return procoid; |
||||||
|
} |
||||||
|
|
||||||
@ -0,0 +1,112 @@ |
|||||||
|
/*-------------------------------------------------------------------------
|
||||||
|
* |
||||||
|
* conversionmacmds.c |
||||||
|
* conversion creation command support code |
||||||
|
* |
||||||
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||||
|
* Portions Copyright (c) 1994, Regents of the University of California |
||||||
|
* |
||||||
|
* |
||||||
|
* IDENTIFICATION |
||||||
|
* $Header: /cvsroot/pgsql/src/backend/commands/conversioncmds.c,v 1.1 2002/07/11 07:39:27 ishii Exp $ |
||||||
|
* |
||||||
|
*------------------------------------------------------------------------- |
||||||
|
*/ |
||||||
|
#include "postgres.h" |
||||||
|
|
||||||
|
#include "catalog/pg_conversion.h" |
||||||
|
#include "catalog/catalog.h" |
||||||
|
#include "catalog/namespace.h" |
||||||
|
#include "catalog/pg_type.h" |
||||||
|
#include "mb/pg_wchar.h" |
||||||
|
#include "commands/conversioncmds.h" |
||||||
|
#include "miscadmin.h" |
||||||
|
#include "parser/parse_func.h" |
||||||
|
#include "utils/acl.h" |
||||||
|
#include "utils/lsyscache.h" |
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* CREATE CONVERSION |
||||||
|
*/ |
||||||
|
void |
||||||
|
CreateConversionCommand(CreateConversionStmt *stmt) |
||||||
|
{ |
||||||
|
Oid namespaceId; |
||||||
|
char *conversion_name; |
||||||
|
AclResult aclresult; |
||||||
|
int for_encoding; |
||||||
|
int to_encoding; |
||||||
|
Oid funcoid; |
||||||
|
Oid funcnamespace; |
||||||
|
char *dummy; |
||||||
|
|
||||||
|
const char *for_encoding_name = stmt->for_encoding_name; |
||||||
|
const char *to_encoding_name = stmt->to_encoding_name; |
||||||
|
List *func_name = stmt->func_name; |
||||||
|
|
||||||
|
static Oid funcargs[] = {INT4OID, INT4OID, 0, 0, INT4OID}; |
||||||
|
|
||||||
|
/* Convert list of names to a name and namespace */ |
||||||
|
namespaceId = QualifiedNameGetCreationNamespace(stmt->conversion_name, &conversion_name); |
||||||
|
|
||||||
|
/* Check we have creation rights in target namespace */ |
||||||
|
aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(), ACL_CREATE); |
||||||
|
if (aclresult != ACLCHECK_OK) |
||||||
|
aclcheck_error(aclresult, get_namespace_name(namespaceId)); |
||||||
|
|
||||||
|
/* Check the encoding names */ |
||||||
|
for_encoding = pg_char_to_encoding(for_encoding_name); |
||||||
|
if (for_encoding < 0) |
||||||
|
elog(ERROR, "Invalid for encoding name: %s", for_encoding_name); |
||||||
|
|
||||||
|
to_encoding = pg_char_to_encoding(to_encoding_name); |
||||||
|
if (to_encoding < 0) |
||||||
|
elog(ERROR, "Invalid to encoding name: %s", to_encoding_name); |
||||||
|
|
||||||
|
/* Check the existence of the conversion function.
|
||||||
|
* Function name could be a qualified name. |
||||||
|
*/ |
||||||
|
funcoid = LookupFuncName(func_name, sizeof(funcargs)/sizeof(Oid), funcargs); |
||||||
|
if (!OidIsValid(funcoid)) |
||||||
|
elog(ERROR, "Function %s does not exist", NameListToString(func_name)); |
||||||
|
|
||||||
|
/* Check the rights for this function and name space */ |
||||||
|
funcnamespace = QualifiedNameGetCreationNamespace(func_name, &dummy); |
||||||
|
aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(), ACL_USAGE); |
||||||
|
if (aclresult != ACLCHECK_OK) |
||||||
|
aclcheck_error(aclresult, get_namespace_name(funcnamespace)); |
||||||
|
|
||||||
|
aclresult = pg_proc_aclcheck(funcoid, GetUserId(), ACL_EXECUTE); |
||||||
|
if (aclresult != ACLCHECK_OK) |
||||||
|
aclcheck_error(aclresult, get_namespace_name(funcnamespace)); |
||||||
|
|
||||||
|
/* All seem ok, go ahead (possible failure would be a duplicate conversion name) */ |
||||||
|
ConversionCreate(conversion_name, namespaceId, GetUserId(), |
||||||
|
for_encoding, to_encoding, funcoid, stmt->def); |
||||||
|
} |
||||||
|
|
||||||
|
/*
|
||||||
|
* DROP CONVERSION |
||||||
|
*/ |
||||||
|
void |
||||||
|
DropConversionCommand(List *name) |
||||||
|
{ |
||||||
|
Oid namespaceId; |
||||||
|
char *conversion_name; |
||||||
|
AclResult aclresult; |
||||||
|
|
||||||
|
/* Convert list of names to a name and namespace */ |
||||||
|
namespaceId = QualifiedNameGetCreationNamespace(name, &conversion_name); |
||||||
|
|
||||||
|
/* Check we have creation rights in target namespace */ |
||||||
|
aclresult = pg_namespace_aclcheck(namespaceId, GetUserId(), ACL_CREATE); |
||||||
|
if (aclresult != ACLCHECK_OK) |
||||||
|
aclcheck_error(aclresult, get_namespace_name(namespaceId)); |
||||||
|
|
||||||
|
/* Go ahead (possible failure would be:
|
||||||
|
* none existing conversion |
||||||
|
* not ower of this conversion |
||||||
|
*/ |
||||||
|
ConversionDrop(conversion_name, namespaceId, GetUserId()); |
||||||
|
} |
||||||
@ -0,0 +1,93 @@ |
|||||||
|
/*-------------------------------------------------------------------------
|
||||||
|
* |
||||||
|
* pg_conversion.h |
||||||
|
* definition of the system "conversion" relation (pg_conversion) |
||||||
|
* along with the relation's initial contents. |
||||||
|
* |
||||||
|
* |
||||||
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||||
|
* Portions Copyright (c) 1994, Regents of the University of California |
||||||
|
* |
||||||
|
* $Id: pg_conversion.h,v 1.1 2002/07/11 07:39:27 ishii Exp $ |
||||||
|
* |
||||||
|
* NOTES |
||||||
|
* the genbki.sh script reads this file and generates .bki |
||||||
|
* information from the DATA() statements. |
||||||
|
* |
||||||
|
*------------------------------------------------------------------------- |
||||||
|
*/ |
||||||
|
#ifndef PG_CONVERSION_H |
||||||
|
#define PG_CONVERSION_H |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* postgres.h contains the system type definitions and the |
||||||
|
* CATALOG(), BOOTSTRAP and DATA() sugar words so this file |
||||||
|
* can be read by both genbki.sh and the C compiler. |
||||||
|
* ---------------- |
||||||
|
*/ |
||||||
|
|
||||||
|
/* ----------------------------------------------------------------
|
||||||
|
* pg_conversion definition. |
||||||
|
* |
||||||
|
* cpp turns this into typedef struct FormData_pg_namespace |
||||||
|
* |
||||||
|
* conname name of the conversion |
||||||
|
* connamespace name space which the conversion belongs to |
||||||
|
* conowner ower of the conversion |
||||||
|
* conforencoding FOR encoding id |
||||||
|
* contoencoding TO encoding id |
||||||
|
* conproc OID of the conversion proc |
||||||
|
* condefault TRUE is this is a default conversion |
||||||
|
* ---------------------------------------------------------------- |
||||||
|
*/ |
||||||
|
CATALOG(pg_conversion) |
||||||
|
{ |
||||||
|
NameData conname; |
||||||
|
Oid connamespace; |
||||||
|
int4 conowner; |
||||||
|
int4 conforencoding; |
||||||
|
int4 contoencoding; |
||||||
|
regproc conproc; |
||||||
|
bool condefault; |
||||||
|
} FormData_pg_conversion; |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* Form_pg_conversion corresponds to a pointer to a tuple with |
||||||
|
* the format of pg_conversion relation. |
||||||
|
* ---------------- |
||||||
|
*/ |
||||||
|
typedef FormData_pg_conversion *Form_pg_conversion; |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* compiler constants for pg_conversion |
||||||
|
* ---------------- |
||||||
|
*/ |
||||||
|
|
||||||
|
#define Natts_pg_conversion 7 |
||||||
|
#define Anum_pg_conversion_conname 1 |
||||||
|
#define Anum_pg_conversion_connamespace 2 |
||||||
|
#define Anum_pg_conversion_conowner 3 |
||||||
|
#define Anum_pg_conversion_conforencoding 4 |
||||||
|
#define Anum_pg_conversion_contoencoding 5 |
||||||
|
#define Anum_pg_conversion_conproc 6 |
||||||
|
#define Anum_pg_conversion_condefault 7 |
||||||
|
|
||||||
|
/* ----------------
|
||||||
|
* initial contents of pg_conversion |
||||||
|
* --------------- |
||||||
|
*/ |
||||||
|
|
||||||
|
/*
|
||||||
|
* prototypes for functions in pg_conversion.c |
||||||
|
*/ |
||||||
|
#include "nodes/pg_list.h" |
||||||
|
|
||||||
|
extern Oid ConversionCreate(const char *conname, Oid connamespace, |
||||||
|
int32 conowner, |
||||||
|
int4 conforencoding, int4 contoencoding, |
||||||
|
Oid conproc, bool def); |
||||||
|
extern void ConversionDrop(const char *conname, Oid connamespace, int32 conowner); |
||||||
|
extern Oid FindDefaultConversion(Oid name_space, int4 for_encoding, int4 to_encoding); |
||||||
|
extern Oid FindConversionByName(List *conname); |
||||||
|
|
||||||
|
#endif /* PG_CONVERSION_H */ |
||||||
@ -0,0 +1,23 @@ |
|||||||
|
/*-------------------------------------------------------------------------
|
||||||
|
* |
||||||
|
* conversioncmds.h |
||||||
|
* prototypes for conversioncmds.c. |
||||||
|
* |
||||||
|
* |
||||||
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group |
||||||
|
* Portions Copyright (c) 1994, Regents of the University of California |
||||||
|
* |
||||||
|
* $Id: conversioncmds.h,v 1.1 2002/07/11 07:39:27 ishii Exp $ |
||||||
|
* |
||||||
|
*------------------------------------------------------------------------- |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef CONVERSIONCMDS_H |
||||||
|
#define CONVERSIONCMDS_H |
||||||
|
|
||||||
|
#include "nodes/parsenodes.h" |
||||||
|
|
||||||
|
extern void CreateConversionCommand(CreateConversionStmt *parsetree); |
||||||
|
extern void DropConversionCommand(List *conversion_name); |
||||||
|
|
||||||
|
#endif /* CONVERSIONCMDS_H */ |
||||||
Loading…
Reference in new issue