pvary commented on a change in pull request #1341:
URL: https://github.com/apache/hive/pull/1341#discussion_r463405230



##########
File path: 
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java
##########
@@ -9483,6 +9483,81 @@ private void dropPartitionColumnStatisticsNoTxn(
     queryWithParams.getLeft().closeAll();
   }
 
+  @Override
+  public void deleteAllPartitionColumnStatistics(TableName tn, String 
writeIdList) {
+
+    String catName = tn.getCat();
+    String dbName = tn.getDb();
+    String tableName = tn.getTable();
+
+    Query query = null;
+    dbName = org.apache.commons.lang3.StringUtils.defaultString(dbName, 
Warehouse.DEFAULT_DATABASE_NAME);
+    catName = normalizeIdentifier(catName);
+    if (tableName == null) {
+      throw new RuntimeException("Table name is null.");
+    }
+    boolean ret = false;
+    try {
+      openTransaction();
+      MTable mTable = getMTable(catName, dbName, tableName);
+
+      query = pm.newQuery(MPartitionColumnStatistics.class);
+
+      Object engine = null;

Review comment:
       This seems strange. Setting this to null and one line below checking




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