TAJO-1249: Tajo Should Check File Format is allowed.

[charsyam]

Currently Tajo just show NullPointException when can't understand file format

default> create external table table1 ( id int, name text, score float, type text, mytime int, mytime2 date) using TEXT1 location 'file:/Users/charsyam/tajo/table';
ERROR: java.lang.NullPointerException

after patch

default> create table table1 (       id int,       name text,       score float,       type text, mytime int) USING csv1;
ERROR: csv1 is not supported storage type.

I added code in LogicalPlanner.java because I think it is more clear and easy to understand.

[blrunner]

Hi @charsyam

Thank you for your contribution.
LogicalPlanVerifier provide logical plan validation. I think you'd better update LogicalPlanVerifier::visitCreateTable.

Cheers
Jaehwa

[blrunner]

I give new opinion again. I think you'd better use PreLogicalPlanVerifier instead of LogicalPlanVerifier. PreLogicalPlanVerifier provide query validation before creating local plan.