Tom Lane db436adf76 Major revision of sort-node handling: push knowledge of query ... sort order down into planner, instead of handling it only at the very top level of the planner. This fixes many things. An explicit sort is now avoided if there is a cheaper alternative (typically an indexscan) not only for ORDER BY, but also for the internal sort of GROUP BY. It works even when there is no other reason (such as a WHERE condition) to consider the indexscan. It works for indexes on functions. It works for indexes on functions, backwards. It's just so cool... CAUTION: I have changed the representation of SortClause nodes, therefore THIS UPDATE BREAKS STORED RULES. You will need to initdb.		1999-08-21 03:49:17 +00:00
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analyze.h	Change #include's to use <> and "" as appropriate.	1999-07-15 23:04:24 +00:00
gramparse.h	Change my-function-name-- to my_function_name, and optimizer renames.	1999-02-13 23:22:53 +00:00
keywords.h	Change my-function-name-- to my_function_name, and optimizer renames.	1999-02-13 23:22:53 +00:00
parse_agg.h	Change #include's to use <> and "" as appropriate.	1999-07-15 23:04:24 +00:00
parse_clause.h	Major revision of sort-node handling: push knowledge of query	1999-08-21 03:49:17 +00:00
parse_coerce.h	More cleanup	1999-07-16 17:07:40 +00:00
parse_expr.h	Revise parse_coerce() to handle coercion of int and float	1999-08-05 02:33:54 +00:00
parse_func.h	Major revision of sort-node handling: push knowledge of query	1999-08-21 03:49:17 +00:00
parse_node.h	Rewrite parser's handling of INSERT ... SELECT so that processing	1999-07-19 00:26:20 +00:00
parse_oper.h	Clean up #include in /include directory. Add scripts for checking includes.	1999-07-15 15:21:54 +00:00
parse_relation.h	Rewrite parser's handling of INSERT ... SELECT so that processing	1999-07-19 00:26:20 +00:00
parse_target.h	Rewrite parser's handling of INSERT ... SELECT so that processing	1999-07-19 00:26:20 +00:00
parse_type.h	Revise parse_coerce() to handle coercion of int and float	1999-08-05 02:33:54 +00:00
parser.h	Change #include's to use <> and "" as appropriate.	1999-07-15 23:04:24 +00:00
parsetree.h	Clean up #include in /include directory. Add scripts for checking includes.	1999-07-15 15:21:54 +00:00
scansup.h	Change my-function-name-- to my_function_name, and optimizer renames.	1999-02-13 23:22:53 +00:00