Remove fmgr.h includes from headers that don't really need it.

Most of the fmgr.h includes were obsoleted by 352a24a1f9. A
few others can be obsoleted using the underlying struct type in an
implementation detail.

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

src/backend/access/common/printsimple.c

@@ -20,7 +20,6 @@
 
 #include "access/printsimple.h"
 #include "catalog/pg_type.h"
-#include "fmgr.h"
 #include "libpq/pqformat.h"
 #include "utils/builtins.h"
 

src/backend/nodes/makefuncs.c

@@ -17,7 +17,6 @@
 
 #include "catalog/pg_class.h"
 #include "catalog/pg_type.h"
-#include "fmgr.h"
 #include "nodes/makefuncs.h"
 #include "nodes/nodeFuncs.h"
 #include "utils/lsyscache.h"

src/backend/replication/logical/logical.c

@@ -28,6 +28,7 @@
 
 #include "postgres.h"
 
+#include "fmgr.h"
 #include "miscadmin.h"
 
 #include "access/xact.h"

src/backend/replication/pgoutput/pgoutput.c

@@ -14,6 +14,8 @@
 
 #include "catalog/pg_publication.h"
 
+#include "fmgr.h"
+
 #include "replication/logical.h"
 #include "replication/logicalproto.h"
 #include "replication/origin.h"

src/include/access/brin.h

@@ -10,7 +10,6 @@
 #ifndef BRIN_H
 #define BRIN_H
 
-#include "fmgr.h"
 #include "nodes/execnodes.h"
 #include "utils/relcache.h"
 

src/include/access/gist_private.h

@@ -17,7 +17,6 @@
 #include "access/amapi.h"
 #include "access/gist.h"
 #include "access/itup.h"
-#include "fmgr.h"
 #include "lib/pairingheap.h"
 #include "storage/bufmgr.h"
 #include "storage/buffile.h"

src/include/access/hash.h

@@ -20,7 +20,6 @@
 #include "access/amapi.h"
 #include "access/itup.h"
 #include "access/sdir.h"
-#include "fmgr.h"
 #include "lib/stringinfo.h"
 #include "storage/bufmgr.h"
 #include "storage/lockdefs.h"

src/include/access/spgist.h

@@ -16,7 +16,6 @@
 
 #include "access/amapi.h"
 #include "access/xlogreader.h"
-#include "fmgr.h"
 #include "lib/stringinfo.h"
 
 

src/include/commands/async.h

@@ -15,8 +15,6 @@
 
 #include <signal.h>
 
-#include "fmgr.h"
-
 /*
  * The number of SLRU page buffers we use for the notification queue.
  */

src/include/executor/executor.h

@@ -15,6 +15,7 @@
 #define EXECUTOR_H
 
 #include "executor/execdesc.h"
+#include "fmgr.h"
 #include "nodes/lockoptions.h"
 #include "nodes/parsenodes.h"
 #include "utils/memutils.h"

src/include/jit/llvmjit_emit.h

@@ -17,7 +17,6 @@
 
 #include <llvm-c/Core.h>
 
-#include "fmgr.h"
 #include "jit/llvmjit.h"
 
 

src/include/nodes/execnodes.h

@@ -16,6 +16,7 @@
 
 #include "access/tupconvert.h"
 #include "executor/instrument.h"
+#include "fmgr.h"
 #include "lib/pairingheap.h"
 #include "nodes/params.h"
 #include "nodes/plannodes.h"

src/include/nodes/pathnodes.h

@@ -15,7 +15,6 @@
 #define PATHNODES_H
 
 #include "access/sdir.h"
-#include "fmgr.h"
 #include "lib/stringinfo.h"
 #include "nodes/params.h"
 #include "nodes/parsenodes.h"
@@ -400,7 +399,7 @@ typedef struct PartitionSchemeData
 	bool	   *parttypbyval;
 
 	/* Cached information about partition comparison functions. */
-	FmgrInfo   *partsupfunc;
+	struct FmgrInfo *partsupfunc;
 }			PartitionSchemeData;
 
 typedef struct PartitionSchemeData *PartitionScheme;

src/include/pgstat.h

@@ -12,7 +12,6 @@
 #define PGSTAT_H
 
 #include "datatype/timestamp.h"
-#include "fmgr.h"
 #include "libpq/pqcomm.h"
 #include "port/atomics.h"
 #include "portability/instr_time.h"
@@ -1402,7 +1401,8 @@ extern void pgstat_count_heap_delete(Relation rel);
 extern void pgstat_count_truncate(Relation rel);
 extern void pgstat_update_heap_dead_tuples(Relation rel, int delta);
 
-extern void pgstat_init_function_usage(FunctionCallInfo fcinfo,
+struct FunctionCallInfoBaseData;
+extern void pgstat_init_function_usage(struct FunctionCallInfoBaseData *fcinfo,
 									   PgStat_FunctionCallUsage *fcu);
 extern void pgstat_end_function_usage(PgStat_FunctionCallUsage *fcu,
 									  bool finalize);

src/include/replication/origin.h

@@ -10,7 +10,6 @@
 #ifndef PG_ORIGIN_H
 #define PG_ORIGIN_H
 
-#include "fmgr.h"
 #include "access/xlog.h"
 #include "access/xlogdefs.h"
 #include "access/xlogreader.h"

src/include/replication/slot.h

@@ -9,7 +9,6 @@
 #ifndef SLOT_H
 #define SLOT_H
 
-#include "fmgr.h"
 #include "access/xlog.h"
 #include "access/xlogreader.h"
 #include "storage/condition_variable.h"

src/include/replication/walreceiver.h

@@ -14,7 +14,6 @@
 
 #include "access/xlog.h"
 #include "access/xlogdefs.h"
-#include "fmgr.h"
 #include "getaddrinfo.h"		/* for NI_MAXHOST */
 #include "replication/logicalproto.h"
 #include "replication/walsender.h"

src/include/replication/walsender.h

@@ -14,8 +14,6 @@
 
 #include <signal.h>
 
-#include "fmgr.h"
-
 /*
  * What to do with a snapshot in create replication slot command.
  */

src/include/utils/bytea.h

@@ -14,7 +14,6 @@
 #ifndef BYTEA_H
 #define BYTEA_H
 
-#include "fmgr.h"
 
 
 typedef enum

src/include/utils/formatting.h

@@ -17,8 +17,6 @@
 #ifndef _FORMATTING_H_
 #define _FORMATTING_H_
 
-#include "fmgr.h"
-
 
 extern char *str_tolower(const char *buff, size_t nbytes, Oid collid);
 extern char *str_toupper(const char *buff, size_t nbytes, Oid collid);

src/include/utils/rel.h

@@ -19,7 +19,6 @@
 #include "catalog/pg_class.h"
 #include "catalog/pg_index.h"
 #include "catalog/pg_publication.h"
-#include "fmgr.h"
 #include "nodes/bitmapset.h"
 #include "rewrite/prs2lock.h"
 #include "storage/block.h"
@@ -159,7 +158,7 @@ typedef struct RelationData
 	Oid		   *rd_opfamily;	/* OIDs of op families for each index col */
 	Oid		   *rd_opcintype;	/* OIDs of opclass declared input data types */
 	RegProcedure *rd_support;	/* OIDs of support procedures */
-	FmgrInfo   *rd_supportinfo; /* lookup info for support procedures */
+	struct FmgrInfo *rd_supportinfo; /* lookup info for support procedures */
 	int16	   *rd_indoption;	/* per-column AM-specific flags */
 	List	   *rd_indexprs;	/* index expression trees, if any */
 	List	   *rd_indpred;		/* index predicate tree, if any */

src/include/utils/snapmgr.h

@@ -14,7 +14,6 @@
 #define SNAPMGR_H
 
 #include "access/transam.h"
-#include "fmgr.h"
 #include "utils/relcache.h"
 #include "utils/resowner.h"
 #include "utils/snapshot.h"

src/include/utils/tuplesort.h

@@ -23,7 +23,6 @@
 
 #include "access/itup.h"
 #include "executor/tuptable.h"
-#include "fmgr.h"
 #include "storage/dsm.h"
 #include "utils/relcache.h"