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https://issues.apache.org/jira/browse/HCATALOG-560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mithun Radhakrishnan updated HCATALOG-560:
------------------------------------------
Description:
HCatClient currently doesn't support the modification of a Table schema to
support new columns. (The equivalent of "ALTER TABLE ... ADD COLUMN(...)".)
This is required by systems that need to support evolving data-schemas. If one
considers the simplified case of only appending columns to the end of a table's
schema-definition, it should be easy to provide and implement the following API
in terms of HMSClient::alter_table():
{{public void appendColumnsToTable(String db, String table,
List<HCatFieldSchema> newColumns) throws HCatException;}}
was:
HCatClient currently doesn't support the modification of a Table schema to
support new columns. (The equivalent of "ALTER TABLE ... ADD COLUMN(...)".)
This is required by systems that need to support evolving data-schemas. If one
considers the simplified case of only appending columns to the end of a table's
schema-definition, it should be easy to provide and implement the following API
in terms of HMSClient::alter_table():
{{
public void appendColumnsToTable(String db, String table, List<HCatFieldSchema>
newColumns) throws HCatException;
}}
> HCatClient should support addition of new columns to a Table.
> -------------------------------------------------------------
>
> Key: HCATALOG-560
> URL: https://issues.apache.org/jira/browse/HCATALOG-560
> Project: HCatalog
> Issue Type: Improvement
> Components: client
> Affects Versions: 0.4.1
> Reporter: Mithun Radhakrishnan
> Assignee: Mithun Radhakrishnan
> Fix For: 0.5, 0.4.1
>
>
> HCatClient currently doesn't support the modification of a Table schema to
> support new columns. (The equivalent of "ALTER TABLE ... ADD COLUMN(...)".)
> This is required by systems that need to support evolving data-schemas. If
> one considers the simplified case of only appending columns to the end of a
> table's schema-definition, it should be easy to provide and implement the
> following API in terms of HMSClient::alter_table():
> {{public void appendColumnsToTable(String db, String table,
> List<HCatFieldSchema> newColumns) throws HCatException;}}
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