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From "Matthew Jacobs (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-5137: Support Kudu UNIXTIME MICROS as Impala TIMESTAMP
Date Mon, 01 May 2017 17:42:07 GMT
Matthew Jacobs has uploaded a new patch set (#5).

Change subject: IMPALA-5137: Support Kudu UNIXTIME_MICROS as Impala TIMESTAMP
......................................................................

IMPALA-5137: Support Kudu UNIXTIME_MICROS as Impala TIMESTAMP

Adds Impala support for TIMESTAMP types stored in Kudu.

Impala stores TIMESTAMP values in 96-bits and has nanosecond
precision. Kudu's timestamp is a 64-bit microsecond delta
from the Unix epoch (called UNIXTIME_MICROS), so a conversion
is necessary.

When writing to Kudu, TIMESTAMP values in nanoseconds are
averaged to the nearest microsecond.

When reading from Kudu, the KuduScanner returns
UNIXTIME_MICROS with 8bytes of padding so Impala can convert
the value to a TimestampValue in-line and copy the entire
row.
TODO: Kudu still needs to provide a knob to enable this:
      https://gerrit.cloudera.org/#/c/6624/

Testing:
Updated the functional_kudu schema to use TIMESTAMPs instead
of converting to STRING, so this provides some decent
coverage. Some BE tests were added, and some EE tests as
well.
TODO: More testing of boundary values, and some basic perf.

TODO: Support pushing down TIMESTAMP predicates
TODO: Support TIMESTAMPs in range partitioning expressions

Change-Id: Iae6ccfffb79118a9036fb2227dba3a55356c896d
---
M be/src/exec/kudu-scanner.cc
M be/src/exec/kudu-table-sink.cc
M be/src/runtime/timestamp-test.cc
M be/src/runtime/timestamp-value.h
M bin/impala-config.sh
M common/thrift/generate_error_codes.py
M fe/src/main/java/org/apache/impala/util/KuduUtil.java
M fe/src/test/java/org/apache/impala/analysis/AnalyzeDDLTest.java
M testdata/datasets/functional/functional_schema_template.sql
A testdata/workloads/functional-query/queries/QueryTest/kudu-overflow-ts-abort-on-error.test
A testdata/workloads/functional-query/queries/QueryTest/kudu-overflow-ts.test
M testdata/workloads/functional-query/queries/QueryTest/kudu_describe.test
M testdata/workloads/functional-query/queries/QueryTest/kudu_insert.test
M tests/query_test/test_kudu.py
M tests/query_test/test_queries.py
M tests/query_test/test_scanners.py
16 files changed, 312 insertions(+), 138 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/26/6526/5
-- 
To view, visit http://gerrit.cloudera.org:8080/6526
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iae6ccfffb79118a9036fb2227dba3a55356c896d
Gerrit-PatchSet: 5
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Matthew Jacobs <mj@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhecht@cloudera.com>
Gerrit-Reviewer: David Ribeiro Alves <davidralves@gmail.com>
Gerrit-Reviewer: Lars Volker <lv@cloudera.com>
Gerrit-Reviewer: Matthew Jacobs <mj@cloudera.com>
Gerrit-Reviewer: Thomas Tauber-Marshall <tmarshall@cloudera.com>

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