Table properties "hcat.isd" and "hcat.osd" not required for tables created
using storage handlers.
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Key: HCATALOG-128
URL: https://issues.apache.org/jira/browse/HCATALOG-128
Project: HCatalog
Issue Type: Improvement
Reporter: Vandana Ayyalasomayajula
Assignee: Vandana Ayyalasomayajula
Priority: Minor
Fix For: 0.3
Currently end-users are required to specify the input and output storage driver
using the table properties when creating tables using storage handlers. This is
due to the fact that HCatInputFormat and HCatOutputFormat rely on the
properties HCatConstants.HCAT_ISD_CLASS and
HCatConstants.HCAT_OSD_CLASS to get information about the storage drivers.
When tables are created using storage handlers, the storage handlers have
information about the storage drivers that should be used with the table. Hence
this information needs not be supplied in the command line.
Example:
create table test_table(key int, value string) STORED BY
'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
"TBLPROPERTIES ('hcat.isd'='org.apache.hcatalog.hbase.HBaseInputStorageDriver',
'hcat.osd'='org.apache.hcatalog.hbase.HBaseOutputStorageDriver','hbase.columns.mapping'=':key,cf1:val')");
becomes
create table test_table(key int, value string) STORED BY
'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
"TBLPROPERTIES ('hbase.columns.mapping'=':key,cf1:val')");
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