kar1rose opened a new issue #12286:
URL: https://github.com/apache/shardingsphere/issues/12286
## Question
when I use join query with two databases, it will throw this error
`String sql = "select * from t_user t join p_order p on t.id = p.user_id ";
while (rs.next()) {
for (int i = 1; i <= count; i++) {
System.out.print(rs.getObject(i));
if (i != count) {
System.out.print("|");
}
}
System.out.println();
}
`
`java.lang.ClassCastException: java.sql.Timestamp cannot be cast to
java.lang.Number
at
org.apache.calcite.avatica.util.AbstractCursor$NumberAccessor.getNumber(AbstractCursor.java:722)
at
org.apache.calcite.avatica.util.AbstractCursor$TimestampFromNumberAccessor.getTimestamp(AbstractCursor.java:996)
at org.apache.calcite.avatica.AvaticaSite.get(AvaticaSite.java:372)
at
org.apache.calcite.avatica.AvaticaResultSet.getObject(AvaticaResultSet.java:393)
at
org.apache.shardingsphere.infra.executor.sql.execute.result.query.impl.driver.jdbc.type.stream.JDBCStreamQueryResult.getValue(JDBCStreamQueryResult.java:87)
at
org.apache.shardingsphere.infra.merge.result.impl.stream.StreamMergedResult.getValue(StreamMergedResult.java:47)
at
org.apache.shardingsphere.driver.jdbc.core.resultset.ShardingSphereResultSet.getObject(ShardingSphereResultSet.java:359)`
it will cast timestamp to Number and error, if I just use single table query
,it's ok like this
'String sql = "select * from t_user t ";'
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