wangsheng has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/16987 )

Change subject: IMPALA-10456: Implement TRUNCATE for Iceberg tables
......................................................................

IMPALA-10456: Implement TRUNCATE for Iceberg tables

This patch adds support for the TRUNCATE statement for
Iceberg tables.

The TRUNCATE operation creates a new snapshot for the target
table that doesn't have any data files. Table and column stats
are also cleared. This patch also fixes a bug that caused
table/column stats not being propagated.

Testing
 * added e2e tests for both partitioned and unpartitioned tables

Change-Id: I6116c7c36aba871c0be79f499e0ac618072ca7b8
Reviewed-on: http://gerrit.cloudera.org:8080/16987
Tested-by: Impala Public Jenkins <[email protected]>
Reviewed-by: wangsheng <[email protected]>
---
M fe/src/main/java/org/apache/impala/analysis/TruncateStmt.java
M fe/src/main/java/org/apache/impala/catalog/IcebergTable.java
M fe/src/main/java/org/apache/impala/catalog/local/LocalIcebergTable.java
M fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java
M fe/src/main/java/org/apache/impala/service/IcebergCatalogOpExecutor.java
M testdata/workloads/functional-query/queries/QueryTest/iceberg-negative.test
A testdata/workloads/functional-query/queries/QueryTest/iceberg-truncate.test
M tests/query_test/test_iceberg.py
8 files changed, 117 insertions(+), 17 deletions(-)

Approvals:
  Impala Public Jenkins: Verified
  wangsheng: Looks good to me, approved

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I6116c7c36aba871c0be79f499e0ac618072ca7b8
Gerrit-Change-Number: 16987
Gerrit-PatchSet: 4
Gerrit-Owner: Zoltan Borok-Nagy <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Gabor Kaszab <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: wangsheng <[email protected]>

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