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From "Alex Behm (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-2716: Hive/Impala incompatibility for timestamp data in Parquet
Date Tue, 04 Apr 2017 05:31:20 GMT
Alex Behm has posted comments on this change.

Change subject: IMPALA-2716: Hive/Impala incompatibility for timestamp data in Parquet
......................................................................


Patch Set 5:

(10 comments)

I'm pretty happy with the code! Moving on to the tests.

http://gerrit.cloudera.org:8080/#/c/5939/5/be/src/exec/hdfs-scan-node-base.h
File be/src/exec/hdfs-scan-node-base.h:

Line 305:   // parquet-mr.
Comment that the FE guarantees that this is a valid timezone.


http://gerrit.cloudera.org:8080/#/c/5939/5/be/src/exec/parquet-column-readers.cc
File be/src/exec/parquet-column-readers.cc:

Line 246:       DCHECK((is_timestamp_dependent_timezone_ && timezone_ == NULL) ||
simplify condition:

is_timestamp_dependent_timezone_ == (timezone_ == NULL)


Line 549:   /// Used to cache the timezone object corresponding to "parquet.mr.int96.write.zone"
the "parquet.mr.int96.write.zone" table property


Line 550:   /// table property to avoid repeated calls to 'TimezoneDatabase::FindTimezone()'.
no need to single-quote here


http://gerrit.cloudera.org:8080/#/c/5939/5/be/src/exprs/timestamp-functions.cc
File be/src/exprs/timestamp-functions.cc:

Line 190:   // See if they specified a zone id
Who is "they"? Suggest rephrasing


Line 202:   return time_zone_ptr();
return NULL?


http://gerrit.cloudera.org:8080/#/c/5939/5/common/thrift/BackendGflags.thrift
File common/thrift/BackendGflags.thrift:

Line 58:   // If true, all newly created Parquet tables will have the parquet.mr.int96.write.zone
... all newly created HDFS tables regardless of format ...


http://gerrit.cloudera.org:8080/#/c/5939/5/common/thrift/PlanNodes.thrift
File common/thrift/PlanNodes.thrift:

Line 218:   9: optional string parquet_mr_write_zone;
remove trailing semicolon for consistency


http://gerrit.cloudera.org:8080/#/c/5939/5/fe/src/main/java/org/apache/impala/analysis/BaseTableRef.java
File fe/src/main/java/org/apache/impala/analysis/BaseTableRef.java:

Line 112:       throw new AnalysisException("Invalid Time Zone: " + timezone);
Mention that the timezone is in the table property 'parquet.mr.int96.write.zone'. Otherwise,
the user might have no clue where this timezone comes from.


http://gerrit.cloudera.org:8080/#/c/5939/5/fe/src/main/java/org/apache/impala/analysis/CreateTableStmt.java
File fe/src/main/java/org/apache/impala/analysis/CreateTableStmt.java:

Line 186:             "Only HDFS tables can use '%s' table property.",
the '%s' table property


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Gerrit-MessageType: comment
Gerrit-Change-Id: I3f24525ef45a2814f476bdee76655b30081079d6
Gerrit-PatchSet: 5
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Attila Jeges <attilaj@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.behm@cloudera.com>
Gerrit-Reviewer: Attila Jeges <attilaj@cloudera.com>
Gerrit-Reviewer: Michael Ho
Gerrit-Reviewer: Taras Bobrovytsky <tbobrovytsky@cloudera.com>
Gerrit-Reviewer: Zoltan Ivanfi <zi+gerrit@cloudera.com>
Gerrit-HasComments: Yes

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