Bug57960 - In ha_innodb.cc, get_foreign_key_info() make sure the

referenced_table name uses the actual length of the table name.

mysql-test/suite/innodb/r/innodb_bug57904.result

@@ -24,7 +24,7 @@ MATCH_OPTION	NONE
 UPDATE_RULE	CASCADE
 DELETE_RULE	RESTRICT
 TABLE_NAME	product_order
-REFERENCED_TABLE_NAME	pro
+REFERENCED_TABLE_NAME	product
 CONSTRAINT_CATALOG	def
 CONSTRAINT_SCHEMA	test
 CONSTRAINT_NAME	product_order_ibfk_2
@@ -35,7 +35,7 @@ MATCH_OPTION	NONE
 UPDATE_RULE	RESTRICT
 DELETE_RULE	RESTRICT
 TABLE_NAME	product_order
-REFERENCED_TABLE_NAME	cus
+REFERENCED_TABLE_NAME	customer
 DROP TABLE product_order;
 DROP TABLE product;
 DROP TABLE customer;

storage/innobase/handler/ha_innodb.cc

@@ -8358,7 +8358,7 @@ get_foreign_key_info(
 
 	/* Referenced (parent) table name */
 	ptr = dict_remove_db_name(foreign->referenced_table_name);
-	len = filename_to_tablename(ptr, name_buff, sizeof(name));
+	len = filename_to_tablename(ptr, name_buff, sizeof(name_buff));
 	f_key_info.referenced_table = thd_make_lex_string(thd, 0, name_buff, len, 1);
 
 	/* Dependent (child) database name */