Tom Lane 2d1d96b1ce Teach the system how to use hashing for UNION. (INTERSECT/EXCEPT will follow, ... but seem like a separate patch since most of the remaining work is on the executor side.) I took the opportunity to push selection of the grouping operators for set operations into the parser where it belongs. Otherwise this is just a small exercise in making prepunion.c consider both alternatives. As with the recent DISTINCT patch, this means we can UNION on datatypes that can hash but not sort, and it means that UNION without ORDER BY is no longer certain to produce sorted output.		2008-08-07 01:11:52 +00:00
..
catalog.h	Improve our #include situation by moving pointer types away from the	2008-06-19 00:46:06 +00:00
catversion.h	Teach the system how to use hashing for UNION. (INTERSECT/EXCEPT will follow,	2008-08-07 01:11:52 +00:00
dependency.h	Rewrite DROP's dependency traversal algorithm into an honest two-pass	2008-06-08 22:41:04 +00:00
duplicate_oids	Change the bootstrap sequence so that toast tables for system catalogs are	2006-07-31 01:16:38 +00:00
genbki.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
heap.h	Change the rules for inherited CHECK constraints to be essentially the same	2008-05-09 23:32:05 +00:00
index.h	Update copyrights in source tree to 2008.	2008-01-01 19:46:01 +00:00
indexing.h	Improve our #include situation by moving pointer types away from the	2008-06-19 00:46:06 +00:00
namespace.h	Support "variadic" functions, which can accept a variable number of arguments	2008-07-16 01:30:23 +00:00
pg_aggregate.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_am.h	Multi-column GIN indexes. Teodor Sigaev	2008-07-11 21:06:29 +00:00
pg_amop.h	Alter the xxx_pattern_ops opclasses to use the regular equality operator of	2008-05-27 00:13:09 +00:00
pg_amproc.h	Alter the xxx_pattern_ops opclasses to use the regular equality operator of	2008-05-27 00:13:09 +00:00
pg_attrdef.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_attribute.h	Replace the hard-wired type knowledge in TypeCategory() and IsPreferredType()	2008-07-30 17:05:05 +00:00
pg_auth_members.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_authid.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_autovacuum.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_cast.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_class.h	Replace the hard-wired type knowledge in TypeCategory() and IsPreferredType()	2008-07-30 17:05:05 +00:00
pg_constraint.h	Change the rules for inherited CHECK constraints to be essentially the same	2008-05-09 23:32:05 +00:00
pg_control.h	Allow float8, int8, and related datatypes to be passed by value on machines	2008-04-21 00:26:47 +00:00
pg_conversion.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_conversion_fn.h	Refactor the handling of the various DropStmt variants so that when multiple	2008-06-14 18:04:34 +00:00
pg_database.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_depend.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_description.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_enum.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_index.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_inherits.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_language.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_largeobject.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_listener.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_namespace.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_opclass.h	Reduce the alignment requirement of type "name" from int to char, and arrange	2008-06-24 17:58:27 +00:00
pg_operator.h	Create a type-specific typanalyze routine for tsvector, which collects stats	2008-07-14 00:51:46 +00:00
pg_opfamily.h	Alter the xxx_pattern_ops opclasses to use the regular equality operator of	2008-05-27 00:13:09 +00:00
pg_pltemplate.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_proc.h	Implement SQL-spec RETURNS TABLE syntax for functions.	2008-07-18 03:32:53 +00:00
pg_proc_fn.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_rewrite.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_shdepend.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_shdescription.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_statistic.h	Create a type-specific typanalyze routine for tsvector, which collects stats	2008-07-14 00:51:46 +00:00
pg_tablespace.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_trigger.h	Support statement-level ON TRUNCATE triggers. Simon Riggs	2008-03-28 00:21:56 +00:00
pg_ts_config.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_ts_config_map.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_ts_dict.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_ts_parser.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_ts_template.h	Reduce the need for frontend programs to include "postgres.h" by refactoring	2008-03-27 03:57:34 +00:00
pg_type.h	Flip the default typispreferred setting from true to false. This affects	2008-07-30 19:35:13 +00:00
pg_type_fn.h	Replace the hard-wired type knowledge in TypeCategory() and IsPreferredType()	2008-07-30 17:05:05 +00:00
toasting.h	Update copyrights in source tree to 2008.	2008-01-01 19:46:01 +00:00
unused_oids	Change the bootstrap sequence so that toast tables for system catalogs are	2006-07-31 01:16:38 +00:00