diff options
Diffstat (limited to 'src/backend/optimizer/util/joininfo.c')
| -rw-r--r-- | src/backend/optimizer/util/joininfo.c | 35 |
1 files changed, 12 insertions, 23 deletions
diff --git a/src/backend/optimizer/util/joininfo.c b/src/backend/optimizer/util/joininfo.c index 0f3cf20190..c202615b1f 100644 --- a/src/backend/optimizer/util/joininfo.c +++ b/src/backend/optimizer/util/joininfo.c @@ -8,37 +8,29 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/optimizer/util/joininfo.c,v 1.31 2002/06/20 20:29:31 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/optimizer/util/joininfo.c,v 1.32 2003/01/20 18:54:56 tgl Exp $ * *------------------------------------------------------------------------- */ #include "postgres.h" - #include "optimizer/joininfo.h" -static JoinInfo *joininfo_member(List *join_relids, List *joininfo_list); /* - * joininfo_member - * Determines whether a node has already been created for a join - * between a set of join relations and the relation described by - * 'joininfo_list'. - * - * 'join_relids' is a list of relids corresponding to the join relation - * 'joininfo_list' is the list of joininfo nodes against which this is - * checked - * - * Returns the corresponding node in 'joininfo_list' if such a node - * exists. + * find_joininfo_node + * Find the joininfo node within a relation entry corresponding + * to a join between 'this_rel' and the relations in 'join_relids'. + * If there is no such node, return NULL. * + * Returns a joininfo node, or NULL. */ -static JoinInfo * -joininfo_member(List *join_relids, List *joininfo_list) +JoinInfo * +find_joininfo_node(RelOptInfo *this_rel, Relids join_relids) { List *i; - foreach(i, joininfo_list) + foreach(i, this_rel->joininfo) { JoinInfo *joininfo = (JoinInfo *) lfirst(i); @@ -48,22 +40,19 @@ joininfo_member(List *join_relids, List *joininfo_list) return NULL; } - /* - * find_joininfo_node + * make_joininfo_node * Find the joininfo node within a relation entry corresponding * to a join between 'this_rel' and the relations in 'join_relids'. * A new node is created and added to the relation entry's joininfo * field if the desired one can't be found. * * Returns a joininfo node. - * */ JoinInfo * -find_joininfo_node(RelOptInfo *this_rel, Relids join_relids) +make_joininfo_node(RelOptInfo *this_rel, Relids join_relids) { - JoinInfo *joininfo = joininfo_member(join_relids, - this_rel->joininfo); + JoinInfo *joininfo = find_joininfo_node(this_rel, join_relids); if (joininfo == NULL) { |