Hyunsik Choi created TAJO-1114:
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Summary: Improve ConfVars (SessionVar) to take a validator
interface to check its input.
Key: TAJO-1114
URL: https://issues.apache.org/jira/browse/TAJO-1114
Project: Tajo
Issue Type: Task
Reporter: Hyunsik Choi
Each task uses session variables from client or configs from tajo-site.xml. The
session variables and configs are used in task during query processing.
If invalid configs or invalid session variables are used for a query, the error
will be caused in a runtime instead of query init phase. It's bad situation.
Invalid values must be detected at the initialization phase.
Because each session variable or config varies in its value type and value
range, It would be great if each ConfigKey takes a validator for its value and
Tajo uses validators for it.
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