[DRILL-6369] typeof() fails for constants

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.13.0
• Fix Version/s: 1.16.0
• Assignee: Unassigned
• Reporter: Paul Rogers
• Created: 29/Apr/18 04:21
• Updated: 02/Mar/19 13:00
• Resolved: 02/Mar/19 13:00

Description

The typeof() function reports the type of a column. For example:

SELECT typeof(a) FROM (VALUES (1)) AS T(a);
+---------+
| EXPR$0  |
+---------+
| BIGINT  |
+---------+

But, it does not work on constants:

SELECT typeof(10) FROM (VALUES (1)) AS T(a);
Error: SYSTEM ERROR: IllegalArgumentException:
  Can not set org.apache.drill.exec.vector.complex.reader.FieldReader field
  org.apache.drill.exec.expr.fn.impl.UnionFunctions$GetType.input to
  org.apache.drill.exec.expr.holders.IntHolder