Introduces macros for functions that now have include_out_arguments argument

New macros: FuncnameGetCandidates_compat and expand_function_arguments_compat

The functions (the ones without _compat) now have a new bool include_out_arguments parameter
These new macros give us the ability to use this new parameter for PG14 and it doesn't give the parameter for previous versions
Existing include_out_arguments parameters are set to 'false' to keep current behavior

Relevant PG commit:
e56bce5d43789cce95d099554ae9593ada92b3b7

src/backend/distributed/commands/function.c

@@ -1808,8 +1808,8 @@ GenerateBackupNameForProcCollision(const ObjectAddress *address)
 		List *newProcName = list_make2(namespace, makeString(newName));
 
 		/* don't need to rename if the input arguments don't match */
-		FuncCandidateList clist = FuncnameGetCandidates(newProcName, numargs, NIL, false,
+		FuncCandidateList clist = FuncnameGetCandidates_compat(newProcName, numargs, NIL,
-														false, true);
+															   false, false, false, true);
 		for (; clist; clist = clist->next)
 		{
 			if (memcmp(clist->args, argtypes, sizeof(Oid) * numargs) == 0)

src/backend/distributed/planner/multi_logical_optimizer.c

@@ -3585,8 +3585,8 @@ static Oid
 CitusFunctionOidWithSignature(char *functionName, int numargs, Oid *argtypes)
 {
 	List *aggregateName = list_make2(makeString("pg_catalog"), makeString(functionName));
-	FuncCandidateList clist = FuncnameGetCandidates(aggregateName, numargs, NIL, false,
+	FuncCandidateList clist = FuncnameGetCandidates_compat(aggregateName, numargs, NIL,
-													false, true);
+														   false, false, false, true);
 
 	for (; clist; clist = clist->next)
 	{

src/backend/distributed/utils/citus_clauses.c

@@ -12,6 +12,7 @@
 #include "distributed/insert_select_planner.h"
 #include "distributed/metadata_cache.h"
 #include "distributed/multi_router_planner.h"
+#include "distributed/version_compat.h"
 
 #include "catalog/pg_proc.h"
 #include "catalog/pg_type.h"
@@ -526,8 +527,9 @@ FixFunctionArgumentsWalker(Node *expr, void *context)
 			elog(ERROR, "cache lookup failed for function %u", funcExpr->funcid);
 		}
 
-		funcExpr->args = expand_function_arguments(funcExpr->args,
+		funcExpr->args = expand_function_arguments_compat(funcExpr->args, false,
-												   funcExpr->funcresulttype, func_tuple);
+														  funcExpr->funcresulttype,
+														  func_tuple);
 
 		ReleaseSysCache(func_tuple);
 	}

src/backend/distributed/utils/function_utils.c

@@ -45,10 +45,14 @@ FunctionOidExtended(const char *schemaName, const char *functionName, int argume
 	const bool findVariadics = false;
 	const bool findDefaults = false;
 
-	FuncCandidateList functionList = FuncnameGetCandidates(qualifiedFunctionNameList,
+	FuncCandidateList functionList = FuncnameGetCandidates_compat(
-														   argumentCount,
+		qualifiedFunctionNameList,
-														   argumentList, findVariadics,
+		argumentCount,
-														   findDefaults, true);
+		argumentList,
+		findVariadics,
+		findDefaults, 
+		false,
+		true);
 
 	if (functionList == NULL)
 	{

src/include/distributed/version_compat.h

@@ -40,6 +40,9 @@
 
 /* for MemoryContextMethods->stats */
 #define stats_compat(a, b, c, d, e) stats(a, b, c, d, e)
+#define FuncnameGetCandidates_compat(a, b, c, d, e, f, g) \
+	FuncnameGetCandidates(a, b, c, d, e, f, g)
+#define expand_function_arguments_compat(a, b, c, d) expand_function_arguments(a, b, c, d)
 #else
 #define AlterTableStmtObjType(a) ((a)->relkind)
 #define F_NEXTVAL_COMPAT F_NEXTVAL_OID
@@ -50,6 +53,9 @@
 
 /* for MemoryContextMethods->stats */
 #define stats_compat(a, b, c, d, e) stats(a, b, c, d)
+#define FuncnameGetCandidates_compat(a, b, c, d, e, f, g) \
+	FuncnameGetCandidates(a, b, c, d, e, g)
+#define expand_function_arguments_compat(a, b, c, d) expand_function_arguments(a, c, d)
 #endif
 
 #if PG_VERSION_NUM >= PG_VERSION_13