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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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8
src/backend/optimizer/path/allpaths.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.159 2007/02/19 07:03:28 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/path/allpaths.c,v 1.160 2007/02/20 17:32:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -444,8 +444,8 @@ set_subquery_pathlist(PlannerInfo *root, RelOptInfo *rel,
Query *subquery = rte->subquery;
bool *differentTypes;
double tuple_fraction;
PlannerInfo *subroot;
List *pathkeys;
List *subquery_pathkeys;
/* We need a workspace for keeping track of set-op type coercions */
differentTypes = (bool *)
@ -520,7 +520,7 @@ set_subquery_pathlist(PlannerInfo *root, RelOptInfo *rel,
rel->subplan = subquery_planner(root->glob, subquery,
root->query_level + 1,
tuple_fraction,
&subquery_pathkeys);
&subroot);
/* Copy number of output rows from subplan */
rel->tuples = rel->subplan->plan_rows;
@ -529,7 +529,7 @@ set_subquery_pathlist(PlannerInfo *root, RelOptInfo *rel,
set_baserel_size_estimates(root, rel);
/* Convert subquery pathkeys to outer representation */
pathkeys = convert_subquery_pathkeys(root, rel, subquery_pathkeys);
pathkeys = convert_subquery_pathkeys(root, rel, subroot->query_pathkeys);
/* Generate appropriate path */
add_path(rel, create_subqueryscan_path(rel, pathkeys));