MDEV-22265 Connect string character limit too small for full 64 character...

MDEV-22265 Connect string character limit too small for full 64 character InnoDB table-name limit when using ad-hoc Spider server definitions.

The name of the table sent as an argument to the handler::init() has the
database name in front of it. So we should use
table_share->table_name.length.

storage/spider/mysql-test/spider/r/basic_sql.result

@@ -717,6 +717,10 @@ TRUNCATE TABLE ta_l;
 connection master_1;
 SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_l ORDER BY a;
 a	b	date_format(c, '%Y-%m-%d %H:%i:%s')
+connection master_1;
+create table t2345678911234567892123456789312345678941234567895123234234(id int) ENGINE=SPIDER
+COMMENT='host "192.168.21.1", user "spider", password "password", database "test32738123123123"';
+drop table t2345678911234567892123456789312345678941234567895123234234;
 
 deinit
 connection master_1;

storage/spider/mysql-test/spider/t/basic_sql.test

@@ -2677,6 +2677,11 @@ if ($USE_CHILD_GROUP2)
 --connection master_1
 SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_l ORDER BY a;
 
+--connection master_1
+create table t2345678911234567892123456789312345678941234567895123234234(id int) ENGINE=SPIDER
+    COMMENT='host "192.168.21.1", user "spider", password "password", database "test32738123123123"';
+drop table t2345678911234567892123456789312345678941234567895123234234;
+
 --echo
 --echo deinit
 --disable_warnings
@@ -2689,6 +2694,7 @@ if ($USE_CHILD_GROUP2)
   --connection child2_2
   DROP DATABASE IF EXISTS auto_test_remote2;
 }
+
 --disable_query_log
 --disable_result_log
 --source test_deinit.inc

storage/spider/spd_table.cc

@@ -3552,7 +3552,8 @@ int spider_set_connect_info_default(
     if (!share->tgt_table_names[roop_count] && table_share)
     {
       DBUG_PRINT("info",("spider create default tgt_table_names"));
-      share->tgt_table_names_lengths[roop_count] = share->table_name_length;
+      share->tgt_table_names_lengths[roop_count] =
+        table_share->table_name.length;
       if (
         !(share->tgt_table_names[roop_count] = spider_create_table_name_string(
           table_share->table_name.str,