Fix issue #648 introduced in 0.3.1

[zhicwu]

• only ignore database parameter when given DDL contains DATABASE keyword
• change current database of Statement/PreparedStatement as needed
• add unit test to address regression issue

[github-actions]

Benchmark                           (client)  (statement)   Mode  Cnt     Score     Error  Units
Basic.insertOneRandomNumber  clickhouse-jdbc       normal  thrpt   20   283.777 ±  27.155  ops/s
Basic.insertOneRandomNumber  clickhouse-jdbc     prepared  thrpt   20   293.396 ±  30.924  ops/s
Basic.selectOneRandomNumber  clickhouse-jdbc       normal  thrpt   20  2069.373 ± 255.665  ops/s
Basic.selectOneRandomNumber  clickhouse-jdbc     prepared  thrpt   20  1817.879 ± 301.817  ops/s

[martenlindblad]

Thanks for fixing this issue. I think this should be a hotfix since it breaks our current setup. We can't use 0.3.1 and it seems like 0.3.2 still is far away from release.

[zhicwu]

Thanks for fixing this issue. I think this should be a hotfix since it breaks our current setup. We can't use 0.3.1 and it seems like 0.3.2 still is far away from release.

Sorry I've been lazy lately :p Just released 0.3.1-patch for this and I'll expedite 0.3.2 release(for real ;).