ShikhaAsrani b1ca089446 IMPALA-10797: Frontend changes to enable 'stored as JSONFILE' ...

This change will allow usage of commands that do not require reading the
 Json File like:
- Create Table <Table> stored as JSONFILE
- Show Create Table <Table>
- Describe <Table>

Changes:
- Added JSON as FileFormat to thrift  and HdfsFileFormat.
- Allowing Sql keyword 'jsonfile' and mapping it to JSON format.
- Adding JSON serDe.
- JsonFiles have input format same as TextFile, so we need to use SerDe
library in use to differentiate between the two formats. Overloaded the
functions querying File Format based on input format to consider serDe
library too.
- Added tests for 'Create Table' and 'Show Create Table' commmands

Pending Changes:
- test for Describe command - to be added with backend changes.

Change-Id: I5b8cb2f59df3af09902b49d3bdac16c19954b305
Reviewed-on: http://gerrit.cloudera.org:8080/17727
Reviewed-by: Quanlong Huang <huangquanlong@gmail.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>

2021-08-13 16:04:19 +00:00

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