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Support arrays of composite types, including the rowtypes of regular tables

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and views (but not system catalogs, nor sequences or toast tables).  Get rid
of the hardwired convention that a type's array type is named exactly "_type",
instead using a new column pg_type.typarray to provide the linkage.  (It still
will be named "_type", though, except in odd corner cases such as
maximum-length type names.)

Along the way, make tracking of owner and schema dependencies for types more
uniform: a type directly created by the user has these dependencies, while a
table rowtype or auto-generated array type does not have them, but depends on
its parent object instead.

David Fetter, Andrew Dunstan, Tom Lane
This commit is contained in:
Tom Lane
2007-05-11 17:57:14 +00:00
parent b1110aaa8b
commit bc8036fc66
25 changed files with 698 additions and 407 deletions
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36
src/backend/utils/cache/lsyscache.c vendored
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.151 2007/04/02 03:49:39 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/lsyscache.c,v 1.152 2007/05/11 17:57:12 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -2203,50 +2203,24 @@ get_element_type(Oid typid)
/*
* get_array_type
*
* Given the type OID, get the corresponding array type.
* Given the type OID, get the corresponding "true" array type.
* Returns InvalidOid if no array type can be found.
*
* NB: this only considers varlena arrays to be true arrays.
*/
Oid
get_array_type(Oid typid)
{
HeapTuple tp;
Oid result = InvalidOid;
tp = SearchSysCache(TYPEOID,
ObjectIdGetDatum(typid),
0, 0, 0);
if (HeapTupleIsValid(tp))
{
Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp);
char *array_typename;
Oid namespaceId;
array_typename = makeArrayTypeName(NameStr(typtup->typname));
namespaceId = typtup->typnamespace;
result = ((Form_pg_type) GETSTRUCT(tp))->typarray;
ReleaseSysCache(tp);
tp = SearchSysCache(TYPENAMENSP,
PointerGetDatum(array_typename),
ObjectIdGetDatum(namespaceId),
0, 0);
pfree(array_typename);
if (HeapTupleIsValid(tp))
{
Oid result;
typtup = (Form_pg_type) GETSTRUCT(tp);
if (typtup->typlen == -1 && typtup->typelem == typid)
result = HeapTupleGetOid(tp);
else
result = InvalidOid;
ReleaseSysCache(tp);
return result;
}
}
return InvalidOid;
return result;
}
/*