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[DOCS] KUDU-2051-Update Impala integration limitations
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- Impala's TIMESTAMP and Kudu's UNIXTIME_MACROS
from the list of limitations.

- Impala now pushes down NULL/NOT NULL to Kudu. Those were
removed from the list.

Change-Id: I884b5c6905bc7371e7696133c53ba0df8594e945
Reviewed-on: http://gerrit.cloudera.org:8080/7355
Reviewed-by: Jean-Daniel Cryans <[email protected]>
Tested-by: Kudu Jenkins
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ambreenkazi authored and jdcryans committed Jul 6, 2017
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8 changes: 3 additions & 5 deletions docs/kudu_impala_integration.adoc
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Expand Up @@ -735,12 +735,10 @@ The examples above have only explored a fraction of what you can do with Impala
to work around this issue.
- When creating a Kudu table, the `CREATE TABLE` statement must include the
primary key columns before other columns, in primary key order.
- Kudu tables containing `UNIXTIME_MICROS`-typed columns may not be used as an
external table in Impala.
- Impala can not create Kudu tables with `TIMESTAMP`, `DECIMAL`, `VARCHAR`,
- Impala can not create Kudu tables with `DECIMAL`, `VARCHAR`,
or nested-typed columns.
- Impala can not update values in primary key columns.
- `NULL`, `NOT NULL`, `!=`, and `LIKE` predicates are not pushed to Kudu, and
- Impala cannot update values in primary key columns.
- `!=` and `LIKE` predicates are not pushed to Kudu, and
instead will be evaluated by the Impala scan node. This may decrease performance
relative to other types of predicates.
- Updates, inserts, and deletes via Impala are non-transactional. If a query
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