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

@@ -1739,6 +1739,11 @@ 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());
+  // if parent has no records, child can't have records
+  if (table->type == FK) {
+    if (static_cast<FK_table *>(table)->parent->number_of_initial_records == 0)
+      table->number_of_initial_records = 0;
+  }
 
   static auto no_encryption = opt_bool(NO_ENCRYPTION);