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Posted to issues@drill.apache.org by "Bridget Bevens (JIRA)" <ji...@apache.org> on 2019/05/02 22:53:01 UTC
[jira] [Updated] (DRILL-7058) Refresh command to support subset of
columns
[ https://issues.apache.org/jira/browse/DRILL-7058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Bridget Bevens updated DRILL-7058:
----------------------------------
Labels: doc-complete ready-to-commit (was: doc-impacting ready-to-commit)
> Refresh command to support subset of columns
> --------------------------------------------
>
> Key: DRILL-7058
> URL: https://issues.apache.org/jira/browse/DRILL-7058
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Metadata
> Reporter: Venkata Jyothsna Donapati
> Assignee: Venkata Jyothsna Donapati
> Priority: Major
> Labels: doc-complete, ready-to-commit
> Fix For: 1.16.0
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> Modify the REFRESH TABLE METADATA command to specify selected columns which are deemed interesting in some form - either sorted/partitioned/clustered by and column metadata will be stored only for those columns. The proposed syntax is
> REFRESH TABLE METADATA *_[ COLUMNS (list of columns) / NONE ]_* <table path>
> For example, REFRESH TABLE METADATA COLUMNS (age, salary) `/tmp/employee` stores column metadata only for the age and salary columns. REFRESH TABLE METADATA COLUMNS NONE `/tmp/employee` will not store column metadata for any column.
> By default, if the optional 'COLUMNS' clause is omitted, column metadata is collected for all the columns.
>
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