[ 
https://issues.apache.org/jira/browse/HIVE-25325?focusedWorklogId=624479&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-624479
 ]

ASF GitHub Bot logged work on HIVE-25325:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/Jul/21 16:31
            Start Date: 19/Jul/21 16:31
    Worklog Time Spent: 10m 
      Work Description: pvary commented on a change in pull request #2471:
URL: https://github.com/apache/hive/pull/2471#discussion_r672453546



##########
File path: 
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HMSHandler.java
##########
@@ -3360,42 +3360,50 @@ public CmRecycleResponse cm_recycle(final 
CmRecycleRequest request) throws MetaE
   public void truncate_table(final String dbName, final String tableName, 
List<String> partNames)
       throws NoSuchObjectException, MetaException {
     // Deprecated path, won't work for txn tables.
-    truncateTableInternal(dbName, tableName, partNames, null, -1);
+    truncateTableInternal(dbName, tableName, partNames, null, -1, null);
   }
 
   @Override
   public TruncateTableResponse truncate_table_req(TruncateTableRequest req)
       throws MetaException, TException {
     truncateTableInternal(req.getDbName(), req.getTableName(), 
req.getPartNames(),
-        req.getValidWriteIdList(), req.getWriteId());
+        req.getValidWriteIdList(), req.getWriteId(), 
req.getEnvironmentContext());
     return new TruncateTableResponse();
   }
 
   private void truncateTableInternal(String dbName, String tableName, 
List<String> partNames,
-                                     String validWriteIds, long writeId) 
throws MetaException, NoSuchObjectException {
+                                     String validWriteIds, long writeId, 
EnvironmentContext context) throws MetaException, NoSuchObjectException {
     boolean isSkipTrash = false, needCmRecycle = false;
     try {
       String[] parsedDbName = parseDbName(dbName, conf);
       Table tbl = get_table_core(parsedDbName[CAT_NAME], 
parsedDbName[DB_NAME], tableName);
 
-      boolean truncateFiles = !TxnUtils.isTransactionalTable(tbl) ||
-          !MetastoreConf.getBoolVar(getConf(), 
MetastoreConf.ConfVars.TRUNCATE_ACID_USE_BASE);
-
-      if (truncateFiles) {
-        isSkipTrash = MetaStoreUtils.isSkipTrash(tbl.getParameters());
-        Database db = get_database_core(parsedDbName[CAT_NAME], 
parsedDbName[DB_NAME]);
-        needCmRecycle = ReplChangeManager.shouldEnableCm(db, tbl);
+      boolean skipDataDeletion = false;
+      if (context != null && context.getProperties() != null
+          && context.getProperties().get("truncateSkipDataDeletion") != null) {
+        skipDataDeletion = 
Boolean.parseBoolean(context.getProperties().get("truncateSkipDataDeletion"));
       }
-      // This is not transactional
-      for (Path location : getLocationsForTruncate(getMS(), 
parsedDbName[CAT_NAME],
-          parsedDbName[DB_NAME], tableName, tbl, partNames)) {
-        FileSystem fs = location.getFileSystem(getConf());
+
+      if (!skipDataDeletion) {
+        boolean truncateFiles = !TxnUtils.isTransactionalTable(tbl)
+            || !MetastoreConf.getBoolVar(getConf(), 
MetastoreConf.ConfVars.TRUNCATE_ACID_USE_BASE);
+
         if (truncateFiles) {
-          truncateDataFiles(location, fs, isSkipTrash, needCmRecycle);
-        } else {
-          // For Acid tables we don't need to delete the old files, only write 
an empty baseDir.
-          // Compaction and cleaner will take care of the rest
-          addTruncateBaseFile(location, writeId, fs);
+          isSkipTrash = MetaStoreUtils.isSkipTrash(tbl.getParameters());
+          Database db = get_database_core(parsedDbName[CAT_NAME], 
parsedDbName[DB_NAME]);
+          needCmRecycle = ReplChangeManager.shouldEnableCm(db, tbl);
+        }
+        // This is not transactional
+        for (Path location : getLocationsForTruncate(getMS(), 
parsedDbName[CAT_NAME], parsedDbName[DB_NAME], tableName,
+            tbl, partNames)) {
+          FileSystem fs = location.getFileSystem(getConf());
+          if (truncateFiles) {

Review comment:
       Opps.. I have missed line 3395, so this check is not embedded. Sorry :(




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 624479)
    Time Spent: 2h 40m  (was: 2.5h)

> Add TRUNCATE TABLE support for Hive Iceberg tables
> --------------------------------------------------
>
>                 Key: HIVE-25325
>                 URL: https://issues.apache.org/jira/browse/HIVE-25325
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Marta Kuczora
>            Assignee: Marta Kuczora
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> Implement the TRUNCATE operation for Hive Iceberg tables. Since these tables 
> are unpartitioned in Hive, only the truncate unpartitioned table use case has 
> to be supported.



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