[jira] [Created] (DRILL-2349) null comparison behavior difference between drill and postgres

["Chun Chang (JIRA)" <ji...@apache.org>]

Chun Chang created DRILL-2349:
---------------------------------

             Summary: null comparison behavior difference between drill and postgres
                 Key: DRILL-2349
                 URL: https://issues.apache.org/jira/browse/DRILL-2349
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Data Types
            Reporter: Chun Chang
            Assignee: Daniel Barclay (Drill)


It appears postgres returns null for the following comparison:

{code}
foodmart=# select null=1;
 ?column?
----------

(1 row)

foodmart=# select null <> 1;
 ?column?
----------

(1 row)

foodmart=# select null;
 ?column?
----------

(1 row)
{code}

Drill gives sqlValidatorException:

{code}
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select null=1 from sys.drillbits;
Query failed: SqlValidatorException: Cannot apply '=' to arguments of type '<NULL> = <INTEGER>'. Supported form(s): '<COMPARABLE_TYPE> = <COMPARABLE_TYPE>'

Error: exception while executing query: Failure while executing query. (state=,code=0)
{code}



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