lif123 opened a new issue, #23635:
URL: https://github.com/apache/shardingsphere/issues/23635
## Add property to control whether union all same database sql routes
now union all same database sql routes is default. However union all
will cost much time than before. This cause an exception 'maximum statement
execution time exceeded' . If query time over max_execution_time (mysql).
If union all sql statements number can refer
‘max-connections-size-per-query’ or can be turn off by some property , user can
adjust by themself.
eg:
1.sql routes :10.
2.max-connections-size-per-query :5
--> union all with 2 batch ,each batch contains 5 sql .
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