tree e90cb51cec1b72d4a5229308ebd68ed9c54947ab
parent c359c557eb299174c43ed0d27ab1c2247fc94f74
author norbert.luksa <norbert.luksa@cloudera.com> 1576744354 +0100
committer Impala Public Jenkins <impala-public-jenkins@cloudera.com> 1579022117 +0000

IMPALA-8046: Support CREATE TABLE from an ORC file

Impala supports creating a table using the schema of a file.
However, only Parquet is supported currently. This commit adds
support for creating tables from ORC files

The change relies on the ORC Java API with version 1.5 or
greater, because of a bug in earlier versions. Therefore, ORC is
listed as an external dependency, instead of relying on Hive's
ORC version (from Hive3, Hive also lists it as a dependency).

Also, the commit performs a little clean-up on the ParquetHelper
class, renaming it to ParquetSchemaExtractor and removing outdated
comments.

To create a table from an ORC file, run:
CREATE TABLE tablename LIKE ORC '/path/to/file'

Tests:
 * Added analysis tests for primitive and complex types.
 * Added e2e tests for creating tables from ORC files.

Change-Id: I77cd84cda2ed86516937a67eb320fd41e3f1cf2d
Reviewed-on: http://gerrit.cloudera.org:8080/14811
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>