diff options
| -rw-r--r-- | src/include/nodes/relation.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/include/nodes/relation.h b/src/include/nodes/relation.h index c6585714182..b1884c74fd2 100644 --- a/src/include/nodes/relation.h +++ b/src/include/nodes/relation.h @@ -1269,15 +1269,18 @@ typedef struct ForeignPath } ForeignPath; /* - * CustomPath represents a table scan done by some out-of-core extension. + * CustomPath represents a table scan or a table join done by some out-of-core + * extension. * * We provide a set of hooks here - which the provider must take care to set * up correctly - to allow extensions to supply their own methods of scanning - * a relation. For example, a provider might provide GPU acceleration, a - * cache-based scan, or some other kind of logic we haven't dreamed up yet. + * a relation or joing relations. For example, a provider might provide GPU + * acceleration, a cache-based scan, or some other kind of logic we haven't + * dreamed up yet. * - * CustomPaths can be injected into the planning process for a relation by - * set_rel_pathlist_hook functions. + * CustomPaths can be injected into the planning process for a base or join + * relation by set_rel_pathlist_hook or set_join_pathlist_hook functions, + * respectively. * * Core code must avoid assuming that the CustomPath is only as large as * the structure declared here; providers are allowed to make it the first |