marton-bod commented on a change in pull request #2219:
URL: https://github.com/apache/hive/pull/2219#discussion_r620510669
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/ddl/table/AbstractAlterTableOperation.java
##########
@@ -138,8 +141,32 @@ private void finalizeAlterTableWithWriteIdOp(Table table,
Table oldTable, List<P
environmentContext.putToProperties(HiveMetaHook.ALTER_TABLE_OPERATION_TYPE,
desc.getType().name());
if (partitions == null) {
long writeId = desc.getWriteId() != null ? desc.getWriteId() : 0;
- context.getDb().alterTable(desc.getDbTableName(), table,
desc.isCascade(), environmentContext, true,
- writeId);
+ try {
+ context.getDb().alterTable(desc.getDbTableName(), table,
desc.isCascade(), environmentContext, true, writeId);
+ } catch (HiveException ex) {
+ if
(environmentContext.getProperties().containsKey(HiveMetaHook.INITIALIZE_ROLLBACK_ALTER)
&& Boolean
+
.valueOf(environmentContext.getProperties().get(HiveMetaHook.INITIALIZE_ROLLBACK_ALTER)))
{
+ // in case of rollback of alter table do the following:
+ // 1. drop the already altered table but keep the data files
+ // 2. recreate the original table
+ // 3. run msck repair to sync partitions on filesystem with
metastore
+ context.getDb().dropTable(table.getDbName(), table.getTableName(),
false, true, false);
+ context.getDb().createTable(oldTable);
+ Msck msck = new Msck(false, false);
+ try {
+ msck.init(Msck.getMsckConf(context.getDb().getConf()));
+
msck.updateExpressionProxy(Msck.getProxyClass(context.getDb().getConf()));
+ MsckInfo msckInfo =
+ new MsckInfo(table.getCatalogName(), table.getDbName(),
table.getTableName(), null, null, true, true,
Review comment:
Yeah, makes sense. I guess we could do it one day when we have way too
much time on our hands :)
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
