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Create/drop cast now requires ownership of at least one of the types.

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This commit is contained in:
Peter Eisentraut 2002-08-11 17:44:12 +00:00
parent 014a86ac47
commit 9bccdf17f7
3 changed files with 19 additions and 47 deletions
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12
doc/src/sgml/ref/create_cast.sgml
View File

@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/create_cast.sgml,v 1.1 2002/07/18 23:11:27 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/create_cast.sgml,v 1.2 2002/08/11 17:44:12 petere Exp $ -->
<refentry id="SQL-CREATECAST">
<refmeta>
@ -81,9 +81,8 @@ INSERT INTO foo(f1) VALUES(42);
</para>
<para>
To be able to create a cast, you must own the underlying function.
To be able to create a binary compatible cast, you must own both
the source and the target data type.
To be able to create a cast, you must own the source or the target
data type.
</para>
<variablelist>
@ -154,11 +153,6 @@ INSERT INTO foo(f1) VALUES(42);
Use <command>DROP CAST</command> to remove user-defined casts.
</para>
<para>
The privileges required to create a cast may be changed in a future
release.
</para>
<para>
Remember that if you want to be able to convert types both ways you
need to declare casts both ways explicitly.

14
doc/src/sgml/ref/drop_cast.sgml
View File

@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_cast.sgml,v 1.1 2002/07/18 23:11:27 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_cast.sgml,v 1.2 2002/08/11 17:44:12 petere Exp $ -->
<refentry id="SQL-DROPCAST">
<refmeta>
@ -26,10 +26,9 @@ DROP CAST (<replaceable>sourcetype</replaceable> AS <replaceable>targettype</rep
</para>
<para>
To be able to drop a cast, you must own the underlying function.
To be able to drop a binary compatible cast, you must own both the
source and the target data type. These are the same privileges
that are required to create a cast.
To be able to drop a cast, you must own the source or the target
data type. These are the same privileges that are required to
create a cast.
</para>
<variablelist>
@ -76,11 +75,6 @@ DROP CAST (<replaceable>sourcetype</replaceable> AS <replaceable>targettype</rep
<para>
Use <command>CREATE CAST</command> to create user-defined casts.
</para>
<para>
The privileges required to drop a cast may be changed in a future
release.
</para>
</refsect1>

40
src/backend/commands/functioncmds.c
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/functioncmds.c,v 1.16 2002/08/05 03:29:16 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/functioncmds.c,v 1.17 2002/08/11 17:44:12 petere Exp $
*
* DESCRIPTION
* These routines take the parse tree and pick out the
@ -621,6 +621,12 @@ CreateCast(CreateCastStmt *stmt)
if (sourcetypeid == targettypeid)
elog(ERROR, "source data type and target data type are the same");
if (!pg_type_ownercheck(sourcetypeid, GetUserId())
&& !pg_type_ownercheck(targettypeid, GetUserId()))
elog(ERROR, "must be owner of type %s or type %s",
TypeNameToString(stmt->sourcetype),
TypeNameToString(stmt->targettype));
relation = heap_openr(CastRelationName, RowExclusiveLock);
tuple = SearchSysCache(CASTSOURCETARGET,
@ -639,10 +645,6 @@ CreateCast(CreateCastStmt *stmt)
false,
"CreateCast");
if (!pg_proc_ownercheck(funcid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
NameListToString(stmt->func->funcname));
tuple = SearchSysCache(PROCOID, ObjectIdGetDatum(funcid), 0, 0, 0);
if (!HeapTupleIsValid(tuple))
elog(ERROR, "cache lookup of function %u failed", funcid);
@ -666,12 +668,6 @@ CreateCast(CreateCastStmt *stmt)
else
{
/* indicates binary compatibility */
if (!pg_type_ownercheck(sourcetypeid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
TypeNameToString(stmt->sourcetype));
if (!pg_type_ownercheck(targettypeid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
TypeNameToString(stmt->targettype));
funcid = InvalidOid;
}
@ -730,7 +726,6 @@ DropCast(DropCastStmt *stmt)
Oid sourcetypeid;
Oid targettypeid;
HeapTuple tuple;
Form_pg_cast caststruct;
ObjectAddress object;
sourcetypeid = LookupTypeName(stmt->sourcetype);
@ -753,22 +748,11 @@ DropCast(DropCastStmt *stmt)
TypeNameToString(stmt->targettype));
/* Permission check */
caststruct = (Form_pg_cast) GETSTRUCT(tuple);
if (caststruct->castfunc != InvalidOid)
{
if (!pg_proc_ownercheck(caststruct->castfunc, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
get_func_name(caststruct->castfunc));
}
else
{
if (!pg_type_ownercheck(sourcetypeid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
format_type_be(sourcetypeid));
if (!pg_type_ownercheck(targettypeid, GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER,
format_type_be(targettypeid));
}
if (!pg_type_ownercheck(sourcetypeid, GetUserId())
&& !pg_type_ownercheck(targettypeid, GetUserId()))
elog(ERROR, "must be owner of type %s or type %s",
TypeNameToString(stmt->sourcetype),
TypeNameToString(stmt->targettype));
/*
* Do the deletion