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Remove the Query structure from the executor's API. This allows us to stop

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storing mostly-redundant Query trees in prepared statements, portals, etc.
To replace Query, a new node type called PlannedStmt is inserted by the
planner at the top of a completed plan tree; this carries just the fields of
Query that are still needed at runtime.  The statement lists kept in portals
etc. now consist of intermixed PlannedStmt and bare utility-statement nodes
--- no Query.  This incidentally allows us to remove some fields from Query
and Plan nodes that shouldn't have been there in the first place.

Still to do: simplify the execution-time range table; at the moment the
range table passed to the executor still contains Query trees for subqueries.

initdb forced due to change of stored rules.
This commit is contained in:
Tom Lane
2007-02-20 17:32:18 +00:00
parent 71b0cf2f6b
commit 9cbd0c155d
39 changed files with 1172 additions and 897 deletions
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6
src/include/optimizer/planner.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/optimizer/planner.h,v 1.37 2007/02/19 07:03:34 tgl Exp $
* $PostgreSQL: pgsql/src/include/optimizer/planner.h,v 1.38 2007/02/20 17:32:17 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -18,10 +18,10 @@
#include "nodes/relation.h"
extern Plan *planner(Query *parse, bool isCursor, int cursorOptions,
extern PlannedStmt *planner(Query *parse, bool isCursor, int cursorOptions,
ParamListInfo boundParams);
extern Plan *subquery_planner(PlannerGlobal *glob, Query *parse,
Index level, double tuple_fraction,
List **subquery_pathkeys);
PlannerInfo **subroot);
#endif /* PLANNER_H */