Zoltan Borok-Nagy has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/19138


Change subject: IMPALA-11655: Impala should set write mode "merge-on-read" by 
default
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IMPALA-11655: Impala should set write mode "merge-on-read" by default

Similarly to HIVE-26596 Impala should set merge-on-read write mode
for V2 tables, unless otherwise specified:

* during table creation with 'format-version'='2'
* during alter table set tblproperties 'format-version'='2'

We do so because in the foreseeable future Impala will only support
merge-on-read (on the write-side, on the read side copy-on-write is
also supported). Also, currently Hive only supports merge-on-read.

Testing:
 * e2e tests added

Change-Id: Icaa32472cde98e21fb23f5461175db1bf401db3d
---
M fe/src/main/java/org/apache/impala/analysis/CreateTableStmt.java
M fe/src/main/java/org/apache/impala/catalog/IcebergTable.java
M fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java
M fe/src/main/java/org/apache/impala/util/IcebergUtil.java
M testdata/workloads/functional-query/queries/QueryTest/iceberg-alter.test
M testdata/workloads/functional-query/queries/QueryTest/show-create-table.test
6 files changed, 177 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/38/19138/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Icaa32472cde98e21fb23f5461175db1bf401db3d
Gerrit-Change-Number: 19138
Gerrit-PatchSet: 1
Gerrit-Owner: Zoltan Borok-Nagy <[email protected]>

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