Move inheritance expansion code into its own file

This commit moves expand_inherited_tables and underlings from
optimizer/prep/prepunionc.c to optimizer/utils/inherit.c.
Also, all of the AppendRelInfo-based expression manipulation routines
are moved to optimizer/utils/appendinfo.c.

No functional code changes.  One exception is the introduction of
make_append_rel_info, but that's still just moving around code.

Also, stop including <limits.h> in prepunion.c, which no longer needs
it since 3fc6e2d7f5b6.  I (Álvaro) noticed this because Amit was copying
that to inherit.c, which likewise doesn't need it.

Author: Amit Langote
Discussion: https://postgr.es/m/[email protected]

1 files changed, 0 insertions, 18 deletions

diff --git a/src/include/optimizer/prep.h b/src/include/optimizer/prep.h
index d6991d56905..62d45dd1426 100644
--- a/src/include/optimizer/prep.h
+++ b/src/include/optimizer/prep.h
@@ -47,22 +47,4 @@ extern PlanRowMark *get_plan_rowmark(List *rowmarks, Index rtindex);
  */
 extern RelOptInfo *plan_set_operations(PlannerInfo *root);
 
-extern void expand_inherited_tables(PlannerInfo *root);
-
-extern Node *adjust_appendrel_attrs(PlannerInfo *root, Node *node,
-					   int nappinfos, AppendRelInfo **appinfos);
-
-extern Node *adjust_appendrel_attrs_multilevel(PlannerInfo *root, Node *node,
-								  Relids child_relids,
-								  Relids top_parent_relids);
-
-extern AppendRelInfo **find_appinfos_by_relids(PlannerInfo *root,
-						Relids relids, int *nappinfos);
-
-extern SpecialJoinInfo *build_child_join_sjinfo(PlannerInfo *root,
-						SpecialJoinInfo *parent_sjinfo,
-						Relids left_relids, Relids right_relids);
-extern Relids adjust_child_relids_multilevel(PlannerInfo *root, Relids relids,
-							   Relids child_relids, Relids top_parent_relids);
-
 #endif							/* PREP_H */