[jira] [Created] (DRILL-1836) Default length for Varchar in cast expressions should be changed

["Abhishek Girish (JIRA)" <ji...@apache.org>]

Abhishek Girish created DRILL-1836:
--------------------------------------

             Summary: Default length for Varchar in cast expressions should be changed
                 Key: DRILL-1836
                 URL: https://issues.apache.org/jira/browse/DRILL-1836
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Data Types
            Reporter: Abhishek Girish
            Assignee: Aman Sinha


Current behavior:

Specify length:
> select cast(t1.colfam1.col1 as varchar(10)) from table1 t1;
+------------+
|   EXPR$0   |
+------------+
| val1       |
| val21      |
| val26      |
+------------+

Default length for varchar in a cast expression:
> select cast(t1.colfam1.col1 as varchar) from table1 t1;
+------------+
|   EXPR$0   |
+------------+
| v          |
| v          |
| v          |
+------------+

When the length attribute is not specified with varchar, in a cast expression, Drill treats the default length to be 1. 

Postgres and SQL Server sets the default length to be 30 in such a scenario. The behavior for Drill must be modified to something similar. 





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