[MySQL][Spider]Spider storage engine 2.0 released

I'm pleased to announce the release of Spider storage engine version 2.0(beta).
From this time, version 1.x is stable releases, version 2.x is development releases for new features.

The main changes in this version are following.
- Add table parameter "semi_table_lock_connection".
- Add server parameter "spider_semi_table_lock_connection".
  Spider has "spider_semi_trx", "spider_semi_trx_isolation", (for transactional tables like InnoDB) "spider_semi_table_lock" and "semi_table_lock" (for non transactional tables like MyISAM) options for consistent reading at remote servers during executing 1 SQL at local server. But you must use different connections for transactional tables and non transactional tables because "semi_table_lock" causes implicit transaction commit.
  "semi_table_lock_connection" and "spider_semi_table_lock_connection" can use different connection for transactional tables and non transactional tables by checking that "semi_table_lock" is enabled.

Please see "99_change_logs.txt" in the download documents for checking other changes.


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