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First phase of work on array improvements. ARRAY[x,y,z] constructor

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expressions, ARRAY(sub-SELECT) expressions, some array functions.
Polymorphic functions using ANYARRAY/ANYELEMENT argument and return
types.  Some regression tests in place, documentation is lacking.
Joe Conway, with some kibitzing from Tom Lane.
This commit is contained in:
Tom Lane
2003-04-08 23:20:04 +00:00
parent 6fb5115850
commit 730840c9b6
47 changed files with 2597 additions and 479 deletions
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83
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
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.91 2003/03/23 05:14:36 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.92 2003/04/08 23:20:02 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -1265,6 +1265,87 @@ get_typ_typrelid(Oid typid)
return InvalidOid;
}
/*
* get_element_type
*
* Given the type OID, get the typelem (InvalidOid if not an array type).
*
* NB: this only considers varlena arrays to be true arrays; InvalidOid is
* returned if the input is a fixed-length array type.
*/
Oid
get_element_type(Oid typid)
{
HeapTuple tp;
tp = SearchSysCache(TYPEOID,
ObjectIdGetDatum(typid),
0, 0, 0);
if (HeapTupleIsValid(tp))
{
Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp);
Oid result;
if (typtup->typlen == -1)
result = typtup->typelem;
else
result = InvalidOid;
ReleaseSysCache(tp);
return result;
}
else
return InvalidOid;
}
/*
* get_array_type
*
* Given the type OID, get the corresponding 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;
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;
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;
}
/*
* getTypeInputInfo
*