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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