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Posted to dev@hive.apache.org by "Eric Sun (JIRA)" <ji...@apache.org> on 2009/10/19 18:36:00 UTC
[jira] Updated: (HIVE-887) Allow SELECT without a mapreduce
job
[ https://issues.apache.org/jira/browse/HIVE-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Eric Sun updated HIVE-887:
--------------------------
Description:
I often find myself needing to take a quick look at a particular column of a Hive table.
I usually do this by doing a
SELECT * from <table> LIMIT 20;
from the CLI. Doing this is pretty fast since it doesn't require a mapreduce job. However, it's tough to examine just 1 or 2 columns when the table is very wide.
So, I might do
SELECT <col> from <table> LIMIT 20;
but it's much slower since it requires a map-reduce. It'd be really convenient if a map-reduce wasn't necessary.
Currently a good work around is to do
hive -e "select * from table" | cut --key=n
but it'd be more convenient if it were built in since it alleviates the need for column counting.
was:
I often find myself needing to take a quick look at a particular column of a Hive table.
I usually do this by doing a
SELECT * from <table> LIMIT 20;
from the CLI. Doing this is pretty fast since it doesn't require a mapreduce job. However, it's tough to examine just 1 or 2 columns when the table is very wide.
So, I might do
SELECT <col> from <table> LIMIT 20;
but it's much slower since it requires a map-reduce. It'd be really convenient if a map-reduce wasn't necessary.
Currently a good work around is to do
hive -e "select * from table" | cut --key=n
but it'd be more convenient if it were built in.
> Allow SELECT <col> without a mapreduce job
> ------------------------------------------
>
> Key: HIVE-887
> URL: https://issues.apache.org/jira/browse/HIVE-887
> Project: Hadoop Hive
> Issue Type: New Feature
> Environment: All
> Reporter: Eric Sun
>
> I often find myself needing to take a quick look at a particular column of a Hive table.
> I usually do this by doing a
> SELECT * from <table> LIMIT 20;
> from the CLI. Doing this is pretty fast since it doesn't require a mapreduce job. However, it's tough to examine just 1 or 2 columns when the table is very wide.
> So, I might do
> SELECT <col> from <table> LIMIT 20;
> but it's much slower since it requires a map-reduce. It'd be really convenient if a map-reduce wasn't necessary.
> Currently a good work around is to do
> hive -e "select * from table" | cut --key=n
> but it'd be more convenient if it were built in since it alleviates the need for column counting.
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