hive中drop库的时候报错：Database users is not empty. One or more tables exist

Caused by: InvalidOperationException(message:Database users is not empty. One or more tables exist.)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.drop_database_core(HiveMetaStore.java:1039)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.drop_database(HiveMetaStore.java:1175)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
        at com.sun.proxy.$Proxy33.drop_database(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.dropDatabase(HiveMetaStoreClient.java:866)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.invoke(RetryingMetaStoreClient.java:173)
        at com.sun.proxy.$Proxy34.dropDatabase(Unknown Source)
        at org.apache.hadoop.hive.ql.metadata.Hive.dropDatabase(Hive.java:491)
        ... 21 more (state=08S01,code=1)