Hive: HCatalog CLI and DDL

setup

set hcatalog/bin to path and source ~/.bashrc

#hcat -h

 

Note:Many hcat commands can be issued as hive commands, including all HCatalog DDL commands. The Hive CLI includes some commands that are not available in the HCatalog CLI.

HCatalog DDL

HCatalog supports all Hive Data Definition Language except those operations that require running a MapReduce job.

HCatalog does not support the following Hive DDL and other HiveQL commands:

• ALTER INDEX ... REBUILD
• CREATE TABLE ... AS SELECT
• ALTER TABLE ... CONCATENATE
• ALTER TABLE ARCHIVE/UNARCHIVE PARTITION
• ANALYZE TABLE ... COMPUTE STATISTICS
• IMPORT FROM ...
• EXPORT TABLE

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The following commands are supported by hcat

CREATE TABLE  

DROP TABLE

ALTER TABLE

Create/Drop/Alter View

Show/Describe

Create/Drop Index

Create/Drop Function

"dfs" Command and "set" Command

Reference

https://cwiki.apache.org/confluence/display/Hive/HCatalog+CLI