pvary commented on a change in pull request #2826:
URL: https://github.com/apache/hive/pull/2826#discussion_r758975794
##########
File path:
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java
##########
@@ -5275,38 +5275,67 @@ private void
removeUnusedColumnDescriptor(MColumnDescriptor oldCD) {
return;
}
- boolean success = false;
Query query = null;
+ Query query2 = null;
+ boolean success = false;
+ LOG.debug("execute removeUnusedColumnDescriptor");
+ DatabaseProduct dbProduct =
DatabaseProduct.determineDatabaseProduct(MetaStoreDirectSql.getProductName(pm),
conf);
+ /**
+ * In order to workaround oracle not supporting limit statement caused
performance issue, HIVE-9447 makes
Review comment:
Maybe this comment could go to the new method where we decide if we can
remove the CD or not
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