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File Connector - Definition for Internal table Location
We need the table location to be optional when we define it as an internal table. When the location is not user-defined, the Datastage must define the create table command, but it does not need to define the location.
This is important because the hive has a controlled area in HDFS to store the internal hive table data.
For security reasons this area cannot be used by external users. This area should only be used by Hive.
In this way, we remove the risk of deleting data that should not be deleted because of incorrect location definitions:
create internal table IF NOT EXISTS databasename.tablename (dm_timestamp column, int id) row format delimited fields terminated by '\t' location '/user/hive/warehouse/databasename.db'.
When we run a drop table databasename.tablename the databasename.db will be dropped. In this situation, we lost all data from database "databasename"
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