Barna Zsombor Klara created HIVE-14601: ------------------------------------------
Summary: Altering table/partition file format with preexisting data should not be allowed Key: HIVE-14601 URL: https://issues.apache.org/jira/browse/HIVE-14601 Project: Hive Issue Type: Bug Components: Metastore Reporter: Barna Zsombor Klara Assignee: Barna Zsombor Klara Priority: Minor The file format of a table or a partition can be changed using an alter statement. However this only affects the metadata, the data in hdfs is not changed, leading to a table from which you cannot select anymore. Changing the file format back fixes the issue, but a better approach would be to prevent the alter to the file format if we have data in the tables. The issue is reproducible by executing the following commands: {code} create table test (id int); insert into test values (1); alter table test set fileformat parquet; insert into test values (2); select * from test; {code} Will result in: {code} java.lang.RuntimeException: .../000000_0 is not a Parquet file (too small) (state=,code=0) {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)