Don't include utils/array.h from acl.h.

For most uses of acl.h the details of how "Acl" internally looks like
are irrelevant. It might make sense to move a lot of the
implementation details into a separate header at a later point.

The main motivation of this change is to avoid including fmgr.h (via
array.h, which needs it for exposed structs) in a lot of files that
otherwise don't need it. A subsequent commit will remove the fmgr.h
include from a lot of files.

Directly include utils/array.h and utils/expandeddatum.h from the
files that need them, but previously included them indirectly, via
acl.h.

Author: Andres Freund
Discussion: https://postgr.es/m/20190803193733.g3l3x3o42uv4qj7l@alap3.anarazel.de

contrib/pageinspect/hashfuncs.c

@@ -18,6 +18,7 @@
 #include "catalog/pg_am.h"
 #include "funcapi.h"
 #include "miscadmin.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/rel.h"
 

src/backend/executor/execExpr.c

@@ -42,6 +42,7 @@
 #include "nodes/nodeFuncs.h"
 #include "optimizer/optimizer.h"
 #include "pgstat.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/datum.h"
 #include "utils/lsyscache.h"

src/backend/executor/execExprInterp.c

@@ -62,6 +62,7 @@
 #include "executor/execExpr.h"
 #include "executor/nodeSubplan.h"
 #include "funcapi.h"
+#include "utils/array.h"
 #include "utils/memutils.h"
 #include "miscadmin.h"
 #include "nodes/nodeFuncs.h"

src/backend/executor/execTuples.c

@@ -65,6 +65,7 @@
 #include "nodes/nodeFuncs.h"
 #include "storage/bufmgr.h"
 #include "utils/builtins.h"
+#include "utils/expandeddatum.h"
 #include "utils/lsyscache.h"
 #include "utils/typcache.h"
 

src/backend/executor/nodeAgg.c

@@ -231,6 +231,7 @@
 #include "parser/parse_coerce.h"
 #include "utils/acl.h"
 #include "utils/builtins.h"
+#include "utils/expandeddatum.h"
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"
 #include "utils/syscache.h"

src/backend/executor/nodeWindowAgg.c

@@ -46,6 +46,7 @@
 #include "parser/parse_coerce.h"
 #include "utils/acl.h"
 #include "utils/builtins.h"
+#include "utils/expandeddatum.h"
 #include "utils/datum.h"
 #include "utils/lsyscache.h"
 #include "utils/memutils.h"

src/backend/partitioning/partprune.c

@@ -53,6 +53,7 @@
 #include "partitioning/partbounds.h"
 #include "partitioning/partprune.h"
 #include "rewrite/rewriteManip.h"
+#include "utils/array.h"
 #include "utils/lsyscache.h"
 
 

src/backend/statistics/extended_stats.c

@@ -31,6 +31,7 @@
 #include "postmaster/autovacuum.h"
 #include "statistics/extended_stats_internal.h"
 #include "statistics/statistics.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/fmgroids.h"
 #include "utils/lsyscache.h"

src/backend/statistics/mcv.c

@@ -26,6 +26,7 @@
 #include "optimizer/clauses.h"
 #include "statistics/extended_stats_internal.h"
 #include "statistics/statistics.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/bytea.h"
 #include "utils/fmgroids.h"

src/backend/utils/adt/acl.c

@@ -30,6 +30,7 @@
 #include "funcapi.h"
 #include "miscadmin.h"
 #include "utils/acl.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/catcache.h"
 #include "utils/hashutils.h"

src/backend/utils/adt/tsvector_op.c

@@ -25,6 +25,7 @@
 #include "miscadmin.h"
 #include "parser/parse_coerce.h"
 #include "tsearch/ts_utils.h"
+#include "utils/array.h"
 #include "utils/builtins.h"
 #include "utils/lsyscache.h"
 #include "utils/regproc.h"

src/include/catalog/objectaddress.h

@@ -77,7 +77,7 @@ extern char *getObjectTypeDescription(const ObjectAddress *object);
 extern char *getObjectIdentity(const ObjectAddress *address);
 extern char *getObjectIdentityParts(const ObjectAddress *address,
 									List **objname, List **objargs);
-extern ArrayType *strlist_to_textarray(List *list);
+extern struct ArrayType *strlist_to_textarray(List *list);
 
 extern ObjectType get_relkind_objtype(char relkind);
 

src/include/utils/acl.h

@@ -35,7 +35,6 @@
 #include "access/htup.h"
 #include "nodes/parsenodes.h"
 #include "parser/parse_node.h"
-#include "utils/array.h"
 #include "utils/snapshot.h"
 
 
@@ -104,7 +103,7 @@ typedef struct AclItem
 /*
  * Acl			a one-dimensional array of AclItem
  */
-typedef ArrayType Acl;
+typedef struct ArrayType Acl;
 
 #define ACL_NUM(ACL)			(ARR_DIMS(ACL)[0])
 #define ACL_DAT(ACL)			((AclItem *) ARR_DATA_PTR(ACL))

src/include/utils/array.h

@@ -77,7 +77,7 @@ struct ExprContext;
  * CAUTION: if you change the header for ordinary arrays you will also
  * need to change the headers for oidvector and int2vector!
  */
-typedef struct
+typedef struct ArrayType
 {
 	int32		vl_len_;		/* varlena header (do not touch directly!) */
 	int			ndim;			/* # of dimensions */