[
https://issues.apache.org/jira/browse/HIVE-10593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14549130#comment-14549130
]
Ashish K Singh commented on HIVE-10593:
---------------------------------------
[~lskuff], as part of HIVE-8950, I initially added capability to create hive
table with schema from a specified parquet file, specified as a 'parquet.file'
table property. The concern then became that we are adding a file path in table
properties. The file will only be used during the table creation, but can be
deleted after that. We thought and discussed two possible options to avoid it.
First, remove the table property after successfully creating the table. Second,
restrict this capability only to external tables. I could not find a way to
modify table property without a major refactoring and it seems like most of the
use cases can be addressed by having a dir with parquet data and then creating
an external hive table pointing to that dir. Hive will look for a parquet file
in the dir and get the schema from that file. Makes sense?
> Support creating table from a file schema: CREATE TABLE ... LIKE
> <file_format> '/path/to/file'
> ----------------------------------------------------------------------------------------------
>
> Key: HIVE-10593
> URL: https://issues.apache.org/jira/browse/HIVE-10593
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 1.2.0
> Reporter: Lenni Kuff
>
> It would be useful if Hive could infer the column definitions in a create
> table statement from the underlying data file. For example:
> CREATE TABLE new_tbl LIKE PARQUET '/path/to/file.parquet';
> If the targeted file is not the specified file format, the statement should
> fail analysis. In addition to PARQUET, it would be useful to support other
> formats such as AVRO, JSON, and ORC.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
