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Cause CHAR(n) to TEXT or VARCHAR conversion to automatically strip trailing

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blanks, in hopes of reducing the surprise factor for newbies.  Remove
redundant operators for VARCHAR (it depends wholly on TEXT operations now).
Clean up resolution of ambiguous operators/functions to avoid surprising
choices for domains: domains are treated as equivalent to their base types
and binary-coercibility is no longer considered a preference item when
choosing among multiple operators/functions.  IsBinaryCoercible now correctly
reflects the notion that you need *only* relabel the type to get from type
A to type B: that is, a domain is binary-coercible to its base type, but
not vice versa.  Various marginal cleanup, including merging the essentially
duplicate resolution code in parse_func.c and parse_oper.c.  Improve opr_sanity
regression test to understand about binary compatibility (using pg_cast),
and fix a couple of small errors in the catalogs revealed thereby.
Restructure "special operator" handling to fetch operators via index opclasses
rather than hardwiring assumptions about names (cleans up the pattern_ops
stuff a little).
This commit is contained in:
Tom Lane
2003-05-26 00:11:29 +00:00
parent 297c1658ed
commit f45df8c014
36 changed files with 1012 additions and 1560 deletions
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11
src/include/utils/builtins.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: builtins.h,v 1.218 2003/05/23 22:33:23 tgl Exp $
* $Id: builtins.h,v 1.219 2003/05/26 00:11:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -496,15 +496,6 @@ extern Datum varcharout(PG_FUNCTION_ARGS);
extern Datum varcharrecv(PG_FUNCTION_ARGS);
extern Datum varcharsend(PG_FUNCTION_ARGS);
extern Datum varchar(PG_FUNCTION_ARGS);
extern Datum varchareq(PG_FUNCTION_ARGS);
extern Datum varcharne(PG_FUNCTION_ARGS);
extern Datum varcharlt(PG_FUNCTION_ARGS);
extern Datum varcharle(PG_FUNCTION_ARGS);
extern Datum varchargt(PG_FUNCTION_ARGS);
extern Datum varcharge(PG_FUNCTION_ARGS);
extern Datum varcharcmp(PG_FUNCTION_ARGS);
extern Datum varcharlen(PG_FUNCTION_ARGS);
extern Datum varcharoctetlen(PG_FUNCTION_ARGS);
/* varlena.c */
extern Datum textin(PG_FUNCTION_ARGS);

3
src/include/utils/lsyscache.h
View File

@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: lsyscache.h,v 1.69 2003/05/09 18:08:48 tgl Exp $
* $Id: lsyscache.h,v 1.70 2003/05/26 00:11:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -17,6 +17,7 @@
extern bool op_in_opclass(Oid opno, Oid opclass);
extern bool op_requires_recheck(Oid opno, Oid opclass);
extern Oid get_opclass_member(Oid opclass, int16 strategy);
extern char *get_attname(Oid relid, AttrNumber attnum);
extern AttrNumber get_attnum(Oid relid, const char *attname);
extern Oid get_atttype(Oid relid, AttrNumber attnum);