| 
                                Change Return Type	Optional<Map<String,HiveColumnStatistics>> to Map<String,HiveColumnStatistics> in method public getTableColumnStatistics(databaseName String, tableName String) : Map<String,HiveColumnStatistics> in class com.facebook.presto.hive.metastore.ExtendedHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Map<String,HiveColumnStatistics>>> to Map<String,Map<String,HiveColumnStatistics>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>) : Map<String,Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.glue.GlueHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,HiveColumnStatistics>> to Map<String,HiveColumnStatistics> in method public getTableColumnStatistics(databaseName String, tableName String) : Map<String,HiveColumnStatistics> in class com.facebook.presto.hive.metastore.glue.GlueHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Map<String,HiveColumnStatistics>>> to Map<String,Map<String,HiveColumnStatistics>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>) : Map<String,Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.ExtendedHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Set<ColumnStatisticsObj>>> to Map<String,Set<ColumnStatisticsObj>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>, columnNames Set<String>) : Map<String,Set<ColumnStatisticsObj>> in class com.facebook.presto.hive.metastore.thrift.ThriftHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Set<ColumnStatisticsObj>> to Set<ColumnStatisticsObj> in method public getTableColumnStatistics(databaseName String, tableName String, columnNames Set<String>) : Set<ColumnStatisticsObj> in class com.facebook.presto.hive.metastore.thrift.HiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Set<ColumnStatisticsObj>>> to Map<String,Set<ColumnStatisticsObj>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>, columnNames Set<String>) : Map<String,Set<ColumnStatisticsObj>> in class com.facebook.presto.hive.metastore.thrift.HiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Set<ColumnStatisticsObj>> to Set<ColumnStatisticsObj> in method public getTableColumnStatistics(databaseName String, tableName String, columnNames Set<String>) : Set<ColumnStatisticsObj> in class com.facebook.presto.hive.metastore.thrift.ThriftHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Map<String,HiveColumnStatistics>>> to Map<String,Map<String,HiveColumnStatistics>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>) : Map<String,Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.SemiTransactionalHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,HiveColumnStatistics>> to Map<String,HiveColumnStatistics> in method public getTableColumnStatistics(databaseName String, tableName String) : Map<String,HiveColumnStatistics> in class com.facebook.presto.hive.metastore.SemiTransactionalHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Map<String,HiveColumnStatistics>>> to Map<String,Map<String,HiveColumnStatistics>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>) : Map<String,Map<String,HiveColumnStatistics>> in class com.facebook.presto.hive.metastore.file.FileHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Set<ColumnStatisticsObj>> to Set<ColumnStatisticsObj> in method public getTableColumnStatistics(databaseName String, tableName String, columnNames Set<String>) : Set<ColumnStatisticsObj> in class com.facebook.presto.hive.metastore.thrift.InMemoryHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,HiveColumnStatistics>> to Map<String,HiveColumnStatistics> in method public getTableColumnStatistics(databaseName String, tableName String) : Map<String,HiveColumnStatistics> in class com.facebook.presto.hive.metastore.file.FileHiveMetastore | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Optional<Map<String,Set<ColumnStatisticsObj>>> to Map<String,Set<ColumnStatisticsObj>> in method public getPartitionColumnStatistics(databaseName String, tableName String, partitionNames Set<String>, columnNames Set<String>) : Map<String,Set<ColumnStatisticsObj>> in class com.facebook.presto.hive.metastore.thrift.InMemoryHiveMetastore | 
                                From | 
                                To |