SQL statements are not supported
create table like xxx
create table select xxx
select for update
select lock in share mode
select into outfile/into var_name
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It does not support multi-table associated with cross-database query, sub query.
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Or does not support multiple table UPDATE UPDATE shard key.
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Does not support cross-sliced update / delete [order by] limit
Mycat limited support for transactions
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Mycat only weak support distributed transactions.
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If a node fails after the transaction commit, we can not guarantee transactional consistency.
Mycat NA scene
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To use SQL does not support the scenario
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Require cross-divisional scene piece associated with the query
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The need to ensure strong consistency across fragmented affairs scene
