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Turns out that Mazurkiewicz's gripe about 'function inheritance' is

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actually a type-coercion problem.  If you have a function defined on
class A, and class B inherits from A, then the function ought to work
on class B as well --- but coerce_type didn't know that.  Now it does.
This commit is contained in:
Tom Lane
2000-03-16 06:35:07 +00:00
parent d4a2c86eaf
commit d14c8aab99
4 changed files with 101 additions and 52 deletions
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4
src/include/parser/parse_func.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_func.h,v 1.22 2000/01/26 05:58:27 momjian Exp $
* $Id: parse_func.h,v 1.23 2000/03/16 06:35:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -47,6 +47,8 @@ extern Node *ParseFuncOrColumn(ParseState *pstate,
extern List *setup_base_tlist(Oid typeid);
extern bool typeInheritsFrom(Oid subclassTypeId, Oid superclassTypeId);
extern void func_error(char *caller, char *funcname,
int nargs, Oid *argtypes, char *msg);