postgres.git / summary / log / commit / refs

commit    72ac4d71b54fdac5efc9ecfc23663f26c20ddcf9
Author:   Tomas Vondra <tomas.vondra@postgresql.org>
Date:     Sun Jan 23 02:36:55 2022 +0000

    Correct type of front_pathkey to PathKey
    
    In sort_inner_and_outer we iterate a list of PathKey elements, but the
    variable is declared as (List *). This mistake is benign, because we
    only pass the pointer to lcons() and never dereference it.
    
    This exists since ~2004, but it's confusing. So fix and backpatch to all
    supported branches.
    
    Backpatch-through: 10
    Discussion: https://postgr.es/m/bf3a6ea1-a7d8-7211-0669-189d5c169374%40enterprisedb.com


 src/backend/optimizer/path/joinpath.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/optimizer/path/joinpath.c b/src/backend/optimizer/path/joinpath.c
index c5640b4d3a1..6e25fbeba1c 100644
--- a/src/backend/optimizer/path/joinpath.c
+++ b/src/backend/optimizer/path/joinpath.c
@@ -1243,7 +1243,7 @@ sort_inner_and_outer(PlannerInfo *root,
 
 	foreach(l, all_pathkeys)
 	{
-		List	   *front_pathkey = (List *) lfirst(l);
+		PathKey	   *front_pathkey = (PathKey *) lfirst(l);
 		List	   *cur_mergeclauses;
 		List	   *outerkeys;
 		List	   *innerkeys;


[parent: a192243c75be]