Fixed a case when parent table does not have records,

Fk table tries to insert entries from previous table
and gets an error Failed to add constraint during alter

Now if parent table has 0 records, then fk table will also be empty

Author: rahulmalik87

src/random_test.cpp

@@ -1739,7 +1739,6 @@ Table *Table::table_id(TABLE_TYPES type, int id) {
       options->at(Option::EXACT_INITIAL_RECORDS)->getBool()
           ? options->at(Option::INITIAL_RECORDS_IN_TABLE)->getInt()
           : rand_int(options->at(Option::INITIAL_RECORDS_IN_TABLE)->getInt());
-
   static auto no_encryption = opt_bool(NO_ENCRYPTION);
 
   /* temporary table on 8.0 can't have key block size */
@@ -2812,6 +2811,12 @@ void Table::UpdateRandomROW(Thd1 *thd) {
 bool Table::InsertBulkRecord(Thd1 *thd) {
   bool is_list_partition = false;
 
+  // if parent has no records, child can't have records
+  if (type == FK) {
+    if (static_cast<FK_table *>(this)->parent->number_of_initial_records == 0)
+      number_of_initial_records = 0;
+  }
+
   if (number_of_initial_records == 0)
     return true;