sankarh commented on a change in pull request #541: HIVE-21197 : Hive
Replication can add duplicate data during migration to a target with
hive.strict.managed.tables enabled
URL: https://github.com/apache/hive/pull/541#discussion_r259235570
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File path: ql/src/java/org/apache/hadoop/hive/ql/exec/ReplCopyTask.java
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@@ -271,12 +302,13 @@ public String getName() {
LOG.debug("ReplCopyTask:getLoadCopyTask: {}=>{}", srcPath, dstPath);
if ((replicationSpec != null) && replicationSpec.isInReplicationScope()){
ReplCopyWork rcwork = new ReplCopyWork(srcPath, dstPath, false);
- if (replicationSpec.isReplace() &&
conf.getBoolVar(REPL_ENABLE_MOVE_OPTIMIZATION)) {
+ if (replicationSpec.isReplace() &&
(conf.getBoolVar(REPL_ENABLE_MOVE_OPTIMIZATION) || copyToMigratedTxnTable)) {
rcwork.setDeleteDestIfExist(true);
rcwork.setAutoPurge(isAutoPurge);
rcwork.setNeedRecycle(needRecycle);
}
rcwork.setCopyToMigratedTxnTable(copyToMigratedTxnTable);
+ rcwork.setCheckDuplicateCopy(replicationSpec.needDupCopyCheck());
Review comment:
needDupCopyCheck seems to be a generic flag but we handle only for migration
case. Instead, shall change it to isFirstIncAfterBootstrap which makes it clear
that for some flow, need to handle this case differently.
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