diff options
Diffstat (limited to 'contrib/postgres_fdw/postgres_fdw.c')
| -rw-r--r-- | contrib/postgres_fdw/postgres_fdw.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c index f21689e73d1..4fbbde13bc5 100644 --- a/contrib/postgres_fdw/postgres_fdw.c +++ b/contrib/postgres_fdw/postgres_fdw.c @@ -3911,6 +3911,16 @@ foreign_join_ok(PlannerInfo *root, RelOptInfo *joinrel, JoinType jointype, List *otherclauses; /* + * Core code may call GetForeignJoinPaths hook even when the join + * relation doesn't have a valid user mapping associated with it. See + * build_join_rel() for details. We can't push down such join, since + * there doesn't exist a user mapping which can be used to connect to the + * foreign server. + */ + if (!OidIsValid(joinrel->umid)) + return false; + + /* * We support pushing down INNER, LEFT, RIGHT and FULL OUTER joins. * Constructing queries representing SEMI and ANTI joins is hard, hence * not considered right now. |