The SQL statement for rewriting routes in the full table of the Hint policy

[Pik1031]

Sharding-JDBC 5.4 uses the Hint policy. During full-table routing, if the where condition contains the primary key, the modified SQL statement uses union all to connect all table query statements. If there is no primary key, the result is queried from all tables. And merge it. I don't know if I understand it correctly.