我的问题是我无法在移动应用程序上读取数据库的数据，而无法在日志geoserver中给我此消息。
这是给出的消息：
Caused by: java.lang.RuntimeException: Unable to obtain connection:
ERROR: function postgis_lib_version() does not exist
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Position: 8 at
org.geotools.jdbc.JDBCDataStore.createConnection(JDBCDataStore.java:2096) at
org.geotools.jdbc.JDBCDataStore.createTypeNames(JDBCDataStore.java:992) at
org.geotools.data.store.ContentDataStore.getTypeNames(ContentDataStore.java:308) at
org.vfny.geoserver.util.DataStoreUtils.getDataAccess(DataStoreUtils.java:97)
at org.geoserver.catalog.ResourcePool.getDataStore(ResourcePool.java:649)
geoserver function postgis_lib_version() does not exist