Eugene Koifman created HIVE-17970: ------------------------------------- Summary: LOAD DATA with OVERWRITE doesn't use base_n directory concept Key: HIVE-17970 URL: https://issues.apache.org/jira/browse/HIVE-17970 Project: Hive Issue Type: Sub-task Components: Transactions Affects Versions: 3.0.0 Reporter: Eugene Koifman Priority: Major
Judging by {code:java} Hive.loadTable(Path loadPath, String tableName, LoadFileType loadFileType, boolean isSrcLocal, boolean isSkewedStoreAsSubdir, boolean isAcid, boolean hasFollowingStatsTask, Long txnId, int stmtId, boolean isMmTable) {code} LOAD DATA with OVERWRITE will delete all existing data then write new data into the table. This logic makes sense for non-acid tables but for Acid/MM it should work like INSERT OVERWRITE statement and write new data to base_n/. This way the lock manager can be used to either get an X lock for IOW and thus block all readers or let it run with SemiShared and let readers continue and make the system more concurrent. -- This message was sent by Atlassian JIRA (v6.4.14#64029)