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https://issues.apache.org/jira/browse/HIVE-18373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318210#comment-16318210
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Siddhant Saraf edited comment on HIVE-18373 at 1/9/18 10:28 AM:
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[~minions] yes, as [~thejas] correctly points out, searching for tables within
a database is already implemented.
I would like something similar to search for columns within a table.
[~thejas] As for the syntax, I'm not very sure.
Currently, to list _all_ columns in a table, one can already do:
{code:java}
-- list all columns (already implemented):
hive> show columns in my_table;
{code}
Maybe we can extend the afromentioned tablename filtering syntax to filter the
column names within this list of all columns? How does the following feel:
{code:java}
-- list only columns containing the string 'abc' (suggested syntax):
hive> show columns '*abc*' in my_table;
{code}
However, is anyone aware how it is done in other database systems, like
PostgreSQL? It would be best to copy the syntax from already established ones.
was (Author: siddhantsaraf):
[~minions] yes, as [~thejas] correctly points out, searching for tables within
a database is already implemented.
I would like something similar to search for columns within a table.
[~thejas] As for the syntax, I'm not very sure.
Currently, to list all columns in a table, one can already do:
{code:java}
hive> show columns in my_table;
{code}
Maybe we can extend this syntax to filter the column names? How does the
following feel:
{code:java}
hive> show columns '*abc*' in my_table;
{code}
Is anyone aware how it is done in other database systems, like PostgreSQL? It
would be best to copy the syntax from already established ones.
> Make it easier to search for column name in a table
> ---------------------------------------------------
>
> Key: HIVE-18373
> URL: https://issues.apache.org/jira/browse/HIVE-18373
> Project: Hive
> Issue Type: New Feature
> Reporter: Siddhant Saraf
> Assignee: Madhudeep Petwal
> Priority: Minor
>
> Within a database, to filter for tables with the string 'abc' in its name, I
> can use something like:
> {code:java}
> hive> use my_database;
> hive> show tables '*abc*';
> {code}
> It would be great if I can do something similar to search within the list of
> columns in a table.
> I have a table with around 3200 columns. Searching for the column of interest
> is an onerous task after doing a {{describe}} on it.
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