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Hive, mail # dev - Re: Review Request 11925: Hive-3159 Update AvroSerde to determine schema of new tables


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Re: Review Request 11925: Hive-3159 Update AvroSerde to determine schema of new tables
Mohammad Islam 2013-07-29, 21:47


> On July 29, 2013, 5:41 p.m., Jakob Homan wrote:
> > There is still no text covering a map-reduce job on an already existing, non-Avro table into an avro table.  ie, create a text table, populate it, run a CTAS to manipulate the data into an Avro table.

In general, Hive creates "internal" column names such as col0, col1 etc. Due to this, I didn't able to copy non-avro data to avro data and run select SQL. Only option is to change the current behavior to reuse the provided column names. Separate JIRA regarding this could be a choice.
> On July 29, 2013, 5:41 p.m., Jakob Homan wrote:
> > ql/src/test/queries/clientpositive/avro_create_as_select.q, line 3
> > <https://reviews.apache.org/r/11925/diff/4/?file=325386#file325386line3>
> >
> >     This is testing that one can copy data into an already existing table, but doesn't verify that the already existing, non-avro data is converted correctly.

same as above.
- Mohammad
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/11925/#review24149
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On July 23, 2013, 9:51 a.m., Mohammad Islam wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/11925/
> -----------------------------------------------------------
>
> (Updated July 23, 2013, 9:51 a.m.)
>
>
> Review request for hive, Ashutosh Chauhan and Jakob Homan.
>
>
> Bugs: HIVE-3159
>     https://issues.apache.org/jira/browse/HIVE-3159
>
>
> Repository: hive-git
>
>
> Description
> -------
>
> Problem:
> Hive doesn't support to create a Avro-based table using HQL create table command. It currently requires to specify Avro schema literal or schema file name.
> For multiple cases, it is very inconvenient for user.
> Some of the un-supported use cases:
> 1. Create table ... <Avro-SERDE etc.> as SELECT ... from <NON-AVRO FILE>
> 2. Create table ... <Avro-SERDE etc.> as SELECT from <AVRO TABLE>
> 3. Create  table  without specifying Avro schema.
>
>
> Diffs
> -----
>
>   ql/src/test/queries/clientpositive/avro_create_as_select.q PRE-CREATION
>   ql/src/test/queries/clientpositive/avro_create_as_select2.q PRE-CREATION
>   ql/src/test/queries/clientpositive/avro_no_schema_test.q PRE-CREATION
>   ql/src/test/queries/clientpositive/avro_without_schema.q PRE-CREATION
>   ql/src/test/results/clientpositive/avro_create_as_select.q.out PRE-CREATION
>   ql/src/test/results/clientpositive/avro_create_as_select2.q.out PRE-CREATION
>   ql/src/test/results/clientpositive/avro_no_schema_test.q.out PRE-CREATION
>   ql/src/test/results/clientpositive/avro_without_schema.q.out PRE-CREATION
>   serde/src/java/org/apache/hadoop/hive/serde2/avro/AvroSerdeUtils.java 13848b6
>   serde/src/java/org/apache/hadoop/hive/serde2/avro/TypeInfoToSchema.java PRE-CREATION
>   serde/src/test/org/apache/hadoop/hive/serde2/avro/TestAvroSerdeUtils.java 010f614
>   serde/src/test/org/apache/hadoop/hive/serde2/avro/TestTypeInfoToSchema.java PRE-CREATION
>
> Diff: https://reviews.apache.org/r/11925/diff/
>
>
> Testing
> -------
>
> Wrote a new java Test class for a new Java class. Added a new test case into existing java test class. In addition, there are 4 .q file for testing multiple use-cases.
>
>
> Thanks,
>
> Mohammad Islam
>
>