diff --git a/contrib/lo/lo.c b/contrib/lo/lo.c
index 953659305f..85e67130bb 100644
--- a/contrib/lo/lo.c
+++ b/contrib/lo/lo.c
@@ -82,7 +82,7 @@ lo_manage(PG_FUNCTION_ARGS)
 		char	   *newv = SPI_getvalue(newtuple, tupdesc, attnum);
 
 		if (orig != NULL && (newv == NULL || strcmp(orig, newv) != 0))
-			DirectFunctionCall1(lo_unlink,
+			DirectFunctionCall1(be_lo_unlink,
 								ObjectIdGetDatum(atooid(orig)));
 
 		if (newv)
@@ -102,7 +102,7 @@ lo_manage(PG_FUNCTION_ARGS)
 
 		if (orig != NULL)
 		{
-			DirectFunctionCall1(lo_unlink,
+			DirectFunctionCall1(be_lo_unlink,
 								ObjectIdGetDatum(atooid(orig)));
 
 			pfree(orig);
diff --git a/src/backend/libpq/be-fsstubs.c b/src/backend/libpq/be-fsstubs.c
index 6fae697471..f537affdd9 100644
--- a/src/backend/libpq/be-fsstubs.c
+++ b/src/backend/libpq/be-fsstubs.c
@@ -93,7 +93,7 @@ static Oid	lo_import_internal(text *filename, Oid lobjOid);
  *****************************************************************************/
 
 Datum
-lo_open(PG_FUNCTION_ARGS)
+be_lo_open(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 	int32		mode = PG_GETARG_INT32(1);
@@ -122,7 +122,7 @@ lo_open(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_close(PG_FUNCTION_ARGS)
+be_lo_close(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 
@@ -224,7 +224,7 @@ lo_write(int fd, const char *buf, int len)
 }
 
 Datum
-lo_lseek(PG_FUNCTION_ARGS)
+be_lo_lseek(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int32		offset = PG_GETARG_INT32(1);
@@ -249,7 +249,7 @@ lo_lseek(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_lseek64(PG_FUNCTION_ARGS)
+be_lo_lseek64(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int64		offset = PG_GETARG_INT64(1);
@@ -267,7 +267,7 @@ lo_lseek64(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_creat(PG_FUNCTION_ARGS)
+be_lo_creat(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId;
 
@@ -283,7 +283,7 @@ lo_creat(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_create(PG_FUNCTION_ARGS)
+be_lo_create(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 
@@ -299,7 +299,7 @@ lo_create(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_tell(PG_FUNCTION_ARGS)
+be_lo_tell(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int64		offset;
@@ -322,7 +322,7 @@ lo_tell(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_tell64(PG_FUNCTION_ARGS)
+be_lo_tell64(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int64		offset;
@@ -338,7 +338,7 @@ lo_tell64(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_unlink(PG_FUNCTION_ARGS)
+be_lo_unlink(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 
@@ -378,7 +378,7 @@ lo_unlink(PG_FUNCTION_ARGS)
  *****************************************************************************/
 
 Datum
-loread(PG_FUNCTION_ARGS)
+be_loread(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int32		len = PG_GETARG_INT32(1);
@@ -396,7 +396,7 @@ loread(PG_FUNCTION_ARGS)
 }
 
 Datum
-lowrite(PG_FUNCTION_ARGS)
+be_lowrite(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	bytea	   *wbuf = PG_GETARG_BYTEA_P(1);
@@ -417,7 +417,7 @@ lowrite(PG_FUNCTION_ARGS)
  *	  imports a file as an (inversion) large object.
  */
 Datum
-lo_import(PG_FUNCTION_ARGS)
+be_lo_import(PG_FUNCTION_ARGS)
 {
 	text	   *filename = PG_GETARG_TEXT_PP(0);
 
@@ -429,7 +429,7 @@ lo_import(PG_FUNCTION_ARGS)
  *	  imports a file as an (inversion) large object specifying oid.
  */
 Datum
-lo_import_with_oid(PG_FUNCTION_ARGS)
+be_lo_import_with_oid(PG_FUNCTION_ARGS)
 {
 	text	   *filename = PG_GETARG_TEXT_PP(0);
 	Oid			oid = PG_GETARG_OID(1);
@@ -502,7 +502,7 @@ lo_import_internal(text *filename, Oid lobjOid)
  *	  exports an (inversion) large object.
  */
 Datum
-lo_export(PG_FUNCTION_ARGS)
+be_lo_export(PG_FUNCTION_ARGS)
 {
 	Oid			lobjId = PG_GETARG_OID(0);
 	text	   *filename = PG_GETARG_TEXT_PP(1);
@@ -606,7 +606,7 @@ lo_truncate_internal(int32 fd, int64 len)
 }
 
 Datum
-lo_truncate(PG_FUNCTION_ARGS)
+be_lo_truncate(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int32		len = PG_GETARG_INT32(1);
@@ -616,7 +616,7 @@ lo_truncate(PG_FUNCTION_ARGS)
 }
 
 Datum
-lo_truncate64(PG_FUNCTION_ARGS)
+be_lo_truncate64(PG_FUNCTION_ARGS)
 {
 	int32		fd = PG_GETARG_INT32(0);
 	int64		len = PG_GETARG_INT64(1);
@@ -828,7 +828,7 @@ lo_get_fragment_internal(Oid loOid, int64 offset, int32 nbytes)
  * Read entire LO
  */
 Datum
-lo_get(PG_FUNCTION_ARGS)
+be_lo_get(PG_FUNCTION_ARGS)
 {
 	Oid			loOid = PG_GETARG_OID(0);
 	bytea	   *result;
@@ -842,7 +842,7 @@ lo_get(PG_FUNCTION_ARGS)
  * Read range within LO
  */
 Datum
-lo_get_fragment(PG_FUNCTION_ARGS)
+be_lo_get_fragment(PG_FUNCTION_ARGS)
 {
 	Oid			loOid = PG_GETARG_OID(0);
 	int64		offset = PG_GETARG_INT64(1);
@@ -863,7 +863,7 @@ lo_get_fragment(PG_FUNCTION_ARGS)
  * Create LO with initial contents given by a bytea argument
  */
 Datum
-lo_from_bytea(PG_FUNCTION_ARGS)
+be_lo_from_bytea(PG_FUNCTION_ARGS)
 {
 	Oid			loOid = PG_GETARG_OID(0);
 	bytea	   *str = PG_GETARG_BYTEA_PP(1);
@@ -885,7 +885,7 @@ lo_from_bytea(PG_FUNCTION_ARGS)
  * Update range within LO
  */
 Datum
-lo_put(PG_FUNCTION_ARGS)
+be_lo_put(PG_FUNCTION_ARGS)
 {
 	Oid			loOid = PG_GETARG_OID(0);
 	int64		offset = PG_GETARG_INT64(1);
diff --git a/src/include/catalog/catversion.h b/src/include/catalog/catversion.h
index 29604b6f4e..6da1fe9340 100644
--- a/src/include/catalog/catversion.h
+++ b/src/include/catalog/catversion.h
@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201701141
+#define CATALOG_VERSION_NO	201701171
 
 #endif
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index 37e022dc0d..7fc0e037b6 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -903,11 +903,11 @@ DESCR("storage manager");
 DATA(insert OID = 763 (  smgrne			   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 16 "210 210" _null_ _null_ _null_ _null_ _null_ smgrne _null_ _null_ _null_ ));
 DESCR("storage manager");
 
-DATA(insert OID = 764 (  lo_import		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "25" _null_ _null_ _null_ _null_ _null_ lo_import _null_ _null_ _null_ ));
+DATA(insert OID = 764 (  lo_import		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "25" _null_ _null_ _null_ _null_ _null_ be_lo_import _null_ _null_ _null_ ));
 DESCR("large object import");
-DATA(insert OID = 767 (  lo_import		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 26 "25 26" _null_ _null_ _null_ _null_ _null_ lo_import_with_oid _null_ _null_ _null_ ));
+DATA(insert OID = 767 (  lo_import		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 26 "25 26" _null_ _null_ _null_ _null_ _null_ be_lo_import_with_oid _null_ _null_ _null_ ));
 DESCR("large object import");
-DATA(insert OID = 765 (  lo_export		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "26 25" _null_ _null_ _null_ _null_ _null_ lo_export _null_ _null_ _null_ ));
+DATA(insert OID = 765 (  lo_export		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "26 25" _null_ _null_ _null_ _null_ _null_ be_lo_export _null_ _null_ _null_ ));
 DESCR("large object export");
 
 DATA(insert OID = 766 (  int4inc		   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 1 0 23 "23" _null_ _null_ _null_ _null_ _null_ int4inc _null_ _null_ _null_ ));
@@ -1011,38 +1011,38 @@ DESCR("convert text to char");
 DATA(insert OID = 946 (  text			   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 1 0 25 "18" _null_ _null_ _null_ _null_ _null_ char_text _null_ _null_ _null_ ));
 DESCR("convert char to text");
 
-DATA(insert OID = 952 (  lo_open		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "26 23" _null_ _null_ _null_ _null_ _null_ lo_open _null_ _null_ _null_ ));
+DATA(insert OID = 952 (  lo_open		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "26 23" _null_ _null_ _null_ _null_ _null_ be_lo_open _null_ _null_ _null_ ));
 DESCR("large object open");
-DATA(insert OID = 953 (  lo_close		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "23" _null_ _null_ _null_ _null_ _null_ lo_close _null_ _null_ _null_ ));
+DATA(insert OID = 953 (  lo_close		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "23" _null_ _null_ _null_ _null_ _null_ be_lo_close _null_ _null_ _null_ ));
 DESCR("large object close");
-DATA(insert OID = 954 (  loread			   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 17 "23 23" _null_ _null_ _null_ _null_ _null_ loread _null_ _null_ _null_ ));
+DATA(insert OID = 954 (  loread			   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 17 "23 23" _null_ _null_ _null_ _null_ _null_ be_loread _null_ _null_ _null_ ));
 DESCR("large object read");
-DATA(insert OID = 955 (  lowrite		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 17" _null_ _null_ _null_ _null_ _null_ lowrite _null_ _null_ _null_ ));
+DATA(insert OID = 955 (  lowrite		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 17" _null_ _null_ _null_ _null_ _null_ be_lowrite _null_ _null_ _null_ ));
 DESCR("large object write");
-DATA(insert OID = 956 (  lo_lseek		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 23 "23 23 23" _null_ _null_ _null_ _null_ _null_	lo_lseek _null_ _null_ _null_ ));
+DATA(insert OID = 956 (  lo_lseek		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 23 "23 23 23" _null_ _null_ _null_ _null_ _null_	be_lo_lseek _null_ _null_ _null_ ));
 DESCR("large object seek");
-DATA(insert OID = 3170 (  lo_lseek64	   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 20 "23 20 23" _null_ _null_ _null_ _null_ _null_	lo_lseek64 _null_ _null_ _null_ ));
+DATA(insert OID = 3170 (  lo_lseek64	   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 20 "23 20 23" _null_ _null_ _null_ _null_ _null_	be_lo_lseek64 _null_ _null_ _null_ ));
 DESCR("large object seek (64 bit)");
-DATA(insert OID = 957 (  lo_creat		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "23" _null_ _null_ _null_ _null_ _null_ lo_creat _null_ _null_ _null_ ));
+DATA(insert OID = 957 (  lo_creat		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "23" _null_ _null_ _null_ _null_ _null_ be_lo_creat _null_ _null_ _null_ ));
 DESCR("large object create");
-DATA(insert OID = 715 (  lo_create		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "26" _null_ _null_ _null_ _null_ _null_ lo_create _null_ _null_ _null_ ));
+DATA(insert OID = 715 (  lo_create		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 26 "26" _null_ _null_ _null_ _null_ _null_ be_lo_create _null_ _null_ _null_ ));
 DESCR("large object create");
-DATA(insert OID = 958 (  lo_tell		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "23" _null_ _null_ _null_ _null_ _null_ lo_tell _null_ _null_ _null_ ));
+DATA(insert OID = 958 (  lo_tell		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "23" _null_ _null_ _null_ _null_ _null_ be_lo_tell _null_ _null_ _null_ ));
 DESCR("large object position");
-DATA(insert OID = 3171 (  lo_tell64		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 20 "23" _null_ _null_ _null_ _null_ _null_ lo_tell64 _null_ _null_ _null_ ));
+DATA(insert OID = 3171 (  lo_tell64		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 20 "23" _null_ _null_ _null_ _null_ _null_ be_lo_tell64 _null_ _null_ _null_ ));
 DESCR("large object position (64 bit)");
-DATA(insert OID = 1004 (  lo_truncate	   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 23" _null_ _null_ _null_ _null_ _null_ lo_truncate _null_ _null_ _null_ ));
+DATA(insert OID = 1004 (  lo_truncate	   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 23" _null_ _null_ _null_ _null_ _null_ be_lo_truncate _null_ _null_ _null_ ));
 DESCR("truncate large object");
-DATA(insert OID = 3172 (  lo_truncate64    PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 20" _null_ _null_ _null_ _null_ _null_ lo_truncate64 _null_ _null_ _null_ ));
+DATA(insert OID = 3172 (  lo_truncate64    PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 23 "23 20" _null_ _null_ _null_ _null_ _null_ be_lo_truncate64 _null_ _null_ _null_ ));
 DESCR("truncate large object (64 bit)");
 
-DATA(insert OID = 3457 (  lo_from_bytea    PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 26 "26 17" _null_ _null_ _null_ _null_ _null_ lo_from_bytea _null_ _null_ _null_ ));
+DATA(insert OID = 3457 (  lo_from_bytea    PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 26 "26 17" _null_ _null_ _null_ _null_ _null_ be_lo_from_bytea _null_ _null_ _null_ ));
 DESCR("create new large object with given content");
-DATA(insert OID = 3458 (  lo_get		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 17 "26" _null_ _null_ _null_ _null_ _null_ lo_get _null_ _null_ _null_ ));
+DATA(insert OID = 3458 (  lo_get		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 17 "26" _null_ _null_ _null_ _null_ _null_ be_lo_get _null_ _null_ _null_ ));
 DESCR("read entire large object");
-DATA(insert OID = 3459 (  lo_get		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 17 "26 20 23" _null_ _null_ _null_ _null_ _null_ lo_get_fragment _null_ _null_ _null_ ));
+DATA(insert OID = 3459 (  lo_get		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 17 "26 20 23" _null_ _null_ _null_ _null_ _null_ be_lo_get_fragment _null_ _null_ _null_ ));
 DESCR("read large object from offset for length");
-DATA(insert OID = 3460 (  lo_put		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 2278 "26 20 17" _null_ _null_ _null_ _null_ _null_ lo_put _null_ _null_ _null_ ));
+DATA(insert OID = 3460 (  lo_put		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 3 0 2278 "26 20 17" _null_ _null_ _null_ _null_ _null_ be_lo_put _null_ _null_ _null_ ));
 DESCR("write data at offset");
 
 DATA(insert OID = 959 (  on_pl			   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 16 "600 628" _null_ _null_ _null_ _null_ _null_ on_pl _null_ _null_ _null_ ));
@@ -1051,7 +1051,7 @@ DATA(insert OID = 961 (  close_pl		   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0
 DATA(insert OID = 962 (  close_sl		   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 600 "601 628" _null_ _null_ _null_ _null_ _null_	close_sl _null_ _null_ _null_ ));
 DATA(insert OID = 963 (  close_lb		   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 600 "628 603" _null_ _null_ _null_ _null_ _null_	close_lb _null_ _null_ _null_ ));
 
-DATA(insert OID = 964 (  lo_unlink		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "26" _null_ _null_ _null_ _null_ _null_ lo_unlink _null_ _null_ _null_ ));
+DATA(insert OID = 964 (  lo_unlink		   PGNSP PGUID 12 1 0 0 0 f f f f t f v u 1 0 23 "26" _null_ _null_ _null_ _null_ _null_ be_lo_unlink _null_ _null_ _null_ ));
 DESCR("large object unlink (delete)");
 
 DATA(insert OID = 973 (  path_inter		   PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 16 "602 602" _null_ _null_ _null_ _null_ _null_ path_inter _null_ _null_ _null_ ));
diff --git a/src/include/libpq/be-fsstubs.h b/src/include/libpq/be-fsstubs.h
index 82eb5914ee..e232749f68 100644
--- a/src/include/libpq/be-fsstubs.h
+++ b/src/include/libpq/be-fsstubs.h
@@ -19,31 +19,31 @@
 /*
  * LO functions available via pg_proc entries
  */
-extern Datum lo_import(PG_FUNCTION_ARGS);
-extern Datum lo_import_with_oid(PG_FUNCTION_ARGS);
-extern Datum lo_export(PG_FUNCTION_ARGS);
+extern Datum be_lo_import(PG_FUNCTION_ARGS);
+extern Datum be_lo_import_with_oid(PG_FUNCTION_ARGS);
+extern Datum be_lo_export(PG_FUNCTION_ARGS);
 
-extern Datum lo_creat(PG_FUNCTION_ARGS);
-extern Datum lo_create(PG_FUNCTION_ARGS);
-extern Datum lo_from_bytea(PG_FUNCTION_ARGS);
+extern Datum be_lo_creat(PG_FUNCTION_ARGS);
+extern Datum be_lo_create(PG_FUNCTION_ARGS);
+extern Datum be_lo_from_bytea(PG_FUNCTION_ARGS);
 
-extern Datum lo_open(PG_FUNCTION_ARGS);
-extern Datum lo_close(PG_FUNCTION_ARGS);
+extern Datum be_lo_open(PG_FUNCTION_ARGS);
+extern Datum be_lo_close(PG_FUNCTION_ARGS);
 
-extern Datum loread(PG_FUNCTION_ARGS);
-extern Datum lowrite(PG_FUNCTION_ARGS);
+extern Datum be_loread(PG_FUNCTION_ARGS);
+extern Datum be_lowrite(PG_FUNCTION_ARGS);
 
-extern Datum lo_get(PG_FUNCTION_ARGS);
-extern Datum lo_get_fragment(PG_FUNCTION_ARGS);
-extern Datum lo_put(PG_FUNCTION_ARGS);
+extern Datum be_lo_get(PG_FUNCTION_ARGS);
+extern Datum be_lo_get_fragment(PG_FUNCTION_ARGS);
+extern Datum be_lo_put(PG_FUNCTION_ARGS);
 
-extern Datum lo_lseek(PG_FUNCTION_ARGS);
-extern Datum lo_tell(PG_FUNCTION_ARGS);
-extern Datum lo_lseek64(PG_FUNCTION_ARGS);
-extern Datum lo_tell64(PG_FUNCTION_ARGS);
-extern Datum lo_unlink(PG_FUNCTION_ARGS);
-extern Datum lo_truncate(PG_FUNCTION_ARGS);
-extern Datum lo_truncate64(PG_FUNCTION_ARGS);
+extern Datum be_lo_lseek(PG_FUNCTION_ARGS);
+extern Datum be_lo_tell(PG_FUNCTION_ARGS);
+extern Datum be_lo_lseek64(PG_FUNCTION_ARGS);
+extern Datum be_lo_tell64(PG_FUNCTION_ARGS);
+extern Datum be_lo_unlink(PG_FUNCTION_ARGS);
+extern Datum be_lo_truncate(PG_FUNCTION_ARGS);
+extern Datum be_lo_truncate64(PG_FUNCTION_ARGS);
 
 /*
  * compatibility option for access control