Soumyakanti Das created HIVE-28333:
--------------------------------------
Summary: Skip CBO for UNIQUEJOIN and TABLESAMPLE
Key: HIVE-28333
URL: https://issues.apache.org/jira/browse/HIVE-28333
Project: Hive
Issue Type: Sub-task
Components: CBO
Reporter: Soumyakanti Das
Assignee: Soumyakanti Das
CBO doesn't support TABLESAMPLE and UNIQUEJOIN.
h3. TABLESAMPLE not supported
fname=archive_excludeHadoop20.q
{code:sql}
SELECT key FROM harbucket TABLESAMPLE(BUCKET 1 OUT OF 10) SORT BY key
{code}
{noformat}
org.apache.hadoop.hive.ql.optimizer.calcite.CalciteSemanticException: Table
Sample specified for harbucket. Currently we don't support Table Sample clauses
in CBO, turn off cbo for queries on tableSamples.{noformat}
h3. UNIQUE JOIN not supported
fname=explainuser_2.q
{code:sql}
EXPLAIN FROM UNIQUEJOIN PRESERVE src a_n19 (a_n19.key), PRESERVE src1 b_n15
(b_n15.key), PRESERVE srcpart c_n4 (c_n4.key) SELECT a_n19.key, b_n15.key,
c_n4.key
{code}
{noformat}
org.apache.hadoop.hive.ql.optimizer.calcite.CalciteSemanticException: UNIQUE
JOIN is currently not supported in CBO, turn off cbo to use UNIQUE
JOIN.{noformat}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
