database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-15 19:21:59 +03:00
Code Activity

First pass at set-returning-functions in FROM, by Joe Conway with

Browse Source 
some kibitzing from Tom Lane.  Not everything works yet, and there's
no documentation or regression test, but let's commit this so Joe
doesn't need to cope with tracking changes in so many files ...
This commit is contained in:
Tom Lane
2002-05-12 20:10:05 +00:00
parent 71009354c8
commit f9e4f611a1
48 changed files with 1813 additions and 329 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/backend/optimizer/path/allpaths.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.83 2001/12/10 22:54:12 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/allpaths.c,v 1.84 2002/05/12 20:10:03 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -42,6 +42,8 @@ static void set_inherited_rel_pathlist(Query *root, RelOptInfo *rel,
List *inheritlist);
static void set_subquery_pathlist(Query *root, RelOptInfo *rel,
Index rti, RangeTblEntry *rte);
static void set_function_pathlist(Query *root, RelOptInfo *rel,
RangeTblEntry *rte);
static RelOptInfo *make_one_rel_by_joins(Query *root, int levels_needed,
List *initial_rels);
@ -98,11 +100,16 @@ set_base_rel_pathlists(Query *root)
rti = lfirsti(rel->relids);
rte = rt_fetch(rti, root->rtable);
if (rel->issubquery)
if (rel->rtekind == RTE_SUBQUERY)
{
/* Subquery --- generate a separate plan for it */
set_subquery_pathlist(root, rel, rti, rte);
}
else if (rel->rtekind == RTE_FUNCTION)
{
/* RangeFunction --- generate a separate plan for it */
set_function_pathlist(root, rel, rte);
}
else if ((inheritlist = expand_inherted_rtentry(root, rti, true))
!= NIL)
{
@ -385,6 +392,23 @@ set_subquery_pathlist(Query *root, RelOptInfo *rel,
set_cheapest(rel);
}
/*
* set_function_pathlist
* Build the (single) access path for a function RTE
*/
static void
set_function_pathlist(Query *root, RelOptInfo *rel, RangeTblEntry *rte)
{
/* Mark rel with estimated output rows, width, etc */
set_function_size_estimates(root, rel);
/* Generate appropriate path */
add_path(rel, create_functionscan_path(root, rel));
/* Select cheapest path (pretty easy in this case...) */
set_cheapest(rel);
}
/*
* make_fromexpr_rel
* Build access paths for a FromExpr jointree node.