database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

SELECT FOR UPDATE is implemented...

Browse Source
This commit is contained in:
Vadim B. Mikheev
1999-01-25 12:01:19 +00:00
parent 443e24beb7
commit 247b3f9054
7 changed files with 715 additions and 581 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
src/backend/optimizer/plan/planner.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.36 1999/01/18 00:09:47 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/plan/planner.c,v 1.37 1999/01/25 12:01:04 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,8 @@
#include "nodes/plannodes.h"
#include "nodes/parsenodes.h"
#include "nodes/relation.h"
#include "nodes/makefuncs.h"
#include "catalog/pg_type.h"
#include "parser/parse_expr.h"
#include "utils/elog.h"
@ -119,6 +121,8 @@ union_planner(Query *parse)
else if ((rt_index =
first_inherit_rt_entry(rangetable)) != -1)
{
if (parse->rowMark != NULL)
elog(ERROR, "SELECT FOR UPDATE is not supported for inherit queries");
result_plan = (Plan *) plan_inherit_queries(parse, rt_index);
/* XXX do we need to do this? bjm 12/19/97 */
tlist = preprocess_targetlist(tlist,
@ -148,17 +152,49 @@ union_planner(Query *parse)
* a new entry and attaches it to the list 'new_tlist' (consisting of the
* VAR node and the RESDOM node as usual with tlists :-) ) */
if (parse->hasAggs)
{
{
if (parse->havingQual != NULL)
{
new_tlist = check_having_qual_for_vars(parse->havingQual,new_tlist);
}
}
{
new_tlist = check_having_qual_for_vars(parse->havingQual,new_tlist);
}
}
new_tlist = preprocess_targetlist(new_tlist,
parse->commandType,
parse->resultRelation,
parse->rtable);
/* FOR UPDATE ... */
if (parse->rowMark != NULL)
{
List *l;
TargetEntry *ctid;
Resdom *resdom;
Var *var;
char *resname;
foreach (l, parse->rowMark)
{
if (!(((RowMark*)lfirst(l))->info & ROW_MARK_FOR_UPDATE))
continue;
resname = (char*) palloc(32);
sprintf(resname, "ctid%u", ((RowMark*)lfirst(l))->rti);
resdom = makeResdom(length(new_tlist) + 1,
TIDOID,
-1,
resname,
0,
0,
1);
var = makeVar(((RowMark*)lfirst(l))->rti, -1, TIDOID,
-1, 0, ((RowMark*)lfirst(l))->rti, -1);
ctid = makeTargetEntry(resdom, (Node *) var);
new_tlist = lappend(new_tlist, ctid);
}
}
/* Here starts the original (pre having) code */
tlist = preprocess_targetlist(tlist,
@ -290,7 +326,7 @@ union_planner(Query *parse)
pfree(vpm);
}
}
/*
* For now, before we hand back the plan, check to see if there is a
* user-specified sort that needs to be done. Eventually, this will