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33 | 33 | #include"utils/lsyscache.h" |
34 | 34 |
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35 | 35 |
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| 36 | +/* Borrowed from joinpath.c */ |
| 37 | +#definePATH_PARAM_BY_REL(path,rel) \ |
| 38 | +((path)->param_info && bms_overlap(PATH_REQ_OUTER(path), (rel)->relids)) |
| 39 | + |
| 40 | + |
36 | 41 | set_join_pathlist_hook_typeset_join_pathlist_next=NULL; |
37 | 42 | set_rel_pathlist_hook_typeset_rel_pathlist_hook_next=NULL; |
38 | 43 | planner_hook_typeplanner_hook_next=NULL; |
@@ -130,7 +135,11 @@ pathman_join_pathlist_hook(PlannerInfo *root, |
130 | 135 | /* Select cheapest path for outerrel */ |
131 | 136 | outer=outerrel->cheapest_total_path; |
132 | 137 |
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133 | | -/* Wrap outer path with Unique if needed */ |
| 138 | +/* We cannot use an outer path that is parameterized by the inner rel */ |
| 139 | +if (PATH_PARAM_BY_REL(outer,innerrel)) |
| 140 | +continue; |
| 141 | + |
| 142 | +/* Wrap 'outer' in unique path if needed */ |
134 | 143 | if (saved_jointype==JOIN_UNIQUE_OUTER) |
135 | 144 | { |
136 | 145 | outer= (Path*)create_unique_path(root,outerrel, |
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