diff --git a/mysql-test/main/sp-code.result b/mysql-test/main/sp-code.result
index 3a4dc9db6f8..001b03a0e3b 100644
--- a/mysql-test/main/sp-code.result
+++ b/mysql-test/main/sp-code.result
@@ -1301,3 +1301,24 @@ Pos	Instruction
 28	jump 4
 29	cpop 1
 DROP PROCEDURE p1;
+#
+# MDEV-14623: Output of show function code does not show FETCH GROUP NEXT ROW
+# for custom aggregates
+#
+create aggregate function f1(x INT) returns int
+begin
+declare continue handler for not found return 0;
+loop
+fetch group next row;
+insert into t2 (sal) values (x);
+end loop;
+end|
+show function code f1;
+Pos	Instruction
+0	hpush_jump 2 1 CONTINUE
+1	freturn int 0
+2	agg_cfetch
+3	stmt 5 "insert into t2 (sal) values (x)"
+4	jump 2
+5	hpop 1
+drop function f1;
diff --git a/mysql-test/main/sp-code.test b/mysql-test/main/sp-code.test
index 1f2f5191f0a..f8c1b4f0a92 100644
--- a/mysql-test/main/sp-code.test
+++ b/mysql-test/main/sp-code.test
@@ -927,3 +927,22 @@ $$
 DELIMITER ;$$
 SHOW PROCEDURE CODE p1;
 DROP PROCEDURE p1;
+
+--echo #
+--echo # MDEV-14623: Output of show function code does not show FETCH GROUP NEXT ROW
+--echo # for custom aggregates
+--echo #
+
+delimiter |;
+create aggregate function f1(x INT) returns int
+begin
+  declare continue handler for not found return 0;
+  loop
+    fetch group next row;
+    insert into t2 (sal) values (x);
+  end loop;
+end|
+
+delimiter ;|
+show function code f1;
+drop function f1;
diff --git a/sql/sp_head.cc b/sql/sp_head.cc
index 1514689d8b3..ac88f05a866 100644
--- a/sql/sp_head.cc
+++ b/sql/sp_head.cc
@@ -4409,7 +4409,7 @@ sp_instr_cfetch::print(String *str)
 int
 sp_instr_agg_cfetch::execute(THD *thd, uint *nextp)
 {
-  DBUG_ENTER("sp_instr_cfetch::execute");
+  DBUG_ENTER("sp_instr_agg_cfetch::execute");
   int res= 0;
   if (!thd->spcont->instr_ptr)
   {
@@ -4434,7 +4434,16 @@ sp_instr_agg_cfetch::execute(THD *thd, uint *nextp)
   DBUG_RETURN(res);
 }
 
+void
+sp_instr_agg_cfetch::print(String *str)
+{
 
+  uint rsrv= SP_INSTR_UINT_MAXLEN+11;
+
+  if (str->reserve(rsrv))
+    return;
+  str->qs_append(STRING_WITH_LEN("agg_cfetch"));
+}
 
 /*
   sp_instr_cursor_copy_struct class functions
diff --git a/sql/sp_head.h b/sql/sp_head.h
index f588f79b599..c0c0c83b77e 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -1957,7 +1957,7 @@ public:
 
   virtual int execute(THD *thd, uint *nextp);
 
-  virtual void print(String *str){};
+  virtual void print(String *str);
 }; // class sp_instr_agg_cfetch : public sp_instr