commit 4850baf8039f2714d01c45a64af7ccbd12bbbd64
Author: Lukas Fittl <lukas@fittl.com>
Date:   Sun Jan 10 00:28:33 2021 -0800

    PL/pgSQL: Make plpgsql_start_datums and plpgsql_finish_datums extern
    
    This allows other source units to have the accompanying functions for
    the already exported plpgsql_adddatum.

diff --git a/src/pl/plpgsql/src/pl_comp.c b/src/pl/plpgsql/src/pl_comp.c
index f1bce708d6..bc9ca26eca 100644
--- a/src/pl/plpgsql/src/pl_comp.c
+++ b/src/pl/plpgsql/src/pl_comp.c
@@ -106,8 +106,6 @@ static Node *make_datum_param(PLpgSQL_expr *expr, int dno, int location);
 static PLpgSQL_row *build_row_from_vars(PLpgSQL_variable **vars, int numvars);
 static PLpgSQL_type *build_datatype(HeapTuple typeTup, int32 typmod,
 									Oid collation, TypeName *origtypname);
-static void plpgsql_start_datums(void);
-static void plpgsql_finish_datums(PLpgSQL_function *function);
 static void compute_function_hashkey(FunctionCallInfo fcinfo,
 									 Form_pg_proc procStruct,
 									 PLpgSQL_func_hashkey *hashkey,
@@ -2292,7 +2290,7 @@ plpgsql_parse_err_condition(char *condname)
  * plpgsql_start_datums			Initialize datum list at compile startup.
  * ----------
  */
-static void
+void
 plpgsql_start_datums(void)
 {
 	datums_alloc = 128;
@@ -2326,7 +2324,7 @@ plpgsql_adddatum(PLpgSQL_datum *newdatum)
  * plpgsql_finish_datums	Copy completed datum info into function struct.
  * ----------
  */
-static void
+void
 plpgsql_finish_datums(PLpgSQL_function *function)
 {
 	Size		copiable_size = 0;
diff --git a/src/pl/plpgsql/src/plpgsql.h b/src/pl/plpgsql/src/plpgsql.h
index 50c3b28472..418516edb9 100644
--- a/src/pl/plpgsql/src/plpgsql.h
+++ b/src/pl/plpgsql/src/plpgsql.h
@@ -1261,6 +1261,8 @@ extern PLpgSQL_recfield *plpgsql_build_recfield(PLpgSQL_rec *rec,
 extern PGDLLEXPORT int plpgsql_recognize_err_condition(const char *condname,
 													   bool allow_sqlstate);
 extern PLpgSQL_condition *plpgsql_parse_err_condition(char *condname);
+extern void plpgsql_start_datums(void);
+extern void plpgsql_finish_datums(PLpgSQL_function *function);
 extern void plpgsql_adddatum(PLpgSQL_datum *newdatum);
 extern int	plpgsql_add_initdatums(int **varnos);
 extern void plpgsql_HashTableInit(void);