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Add new CREATE CONVERSION/DROP CONVERSION command.

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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.
This commit is contained in:
Tatsuo Ishii
2002-07-11 07:39:28 +00:00
parent f2bb1cfa85
commit fcc962566a
19 changed files with 610 additions and 44 deletions
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112
src/backend/commands/conversioncmds.c Normal file
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/*-------------------------------------------------------------------------
*
* 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());
}