Rename nodes/relation.h to nodes/pathnodes.h.

The old name of this file was never a very good indication of what it
was for.  Now that there's also access/relation.h, we have a potential
confusion hazard as well, so let's rename it to something more apropos.
Per discussion, "pathnodes.h" is reasonable, since a good fraction of
the file is Path node definitions.

While at it, tweak a couple of other headers that were gratuitously
importing relation.h into modules that don't need it.

Discussion: https://postgr.es/m/7719.1548688728@sss.pgh.pa.us

1 files changed, 5 insertions, 4 deletions

diff --git a/src/include/partitioning/partprune.h b/src/include/partitioning/partprune.h
index ce9bc8d9fd8..397ffaab369 100644
--- a/src/include/partitioning/partprune.h
+++ b/src/include/partitioning/partprune.h
@@ -15,7 +15,8 @@
 #define PARTPRUNE_H
 
 #include "nodes/execnodes.h"
-#include "nodes/relation.h"
+struct PlannerInfo;				/* avoid including pathnodes.h here */
+struct RelOptInfo;
 
 
 /*
@@ -71,12 +72,12 @@ typedef struct PartitionPruneContext
 #define PruneCxtStateIdx(partnatts, step_id, keyno) \
 	((partnatts) * (step_id) + (keyno))
 
-extern PartitionPruneInfo *make_partition_pruneinfo(PlannerInfo *root,
-						 RelOptInfo *parentrel,
+extern PartitionPruneInfo *make_partition_pruneinfo(struct PlannerInfo *root,
+						 struct RelOptInfo *parentrel,
 						 List *subpaths,
 						 List *partitioned_rels,
 						 List *prunequal);
-extern Relids prune_append_rel_partitions(RelOptInfo *rel);
+extern Bitmapset *prune_append_rel_partitions(struct RelOptInfo *rel);
 extern Bitmapset *get_matching_partitions(PartitionPruneContext *context,
 						List *pruning_steps);