[jira] [Created] (DRILL-6856) Wrong result returned if the query filters a boolean column with both "is true" and "is null" conditions

["Anton Gozhiy (JIRA)" <ji...@apache.org>]

Anton Gozhiy created DRILL-6856:
-----------------------------------

             Summary: Wrong result returned if the query filters a boolean column with both "is true" and "is null" conditions
                 Key: DRILL-6856
                 URL: https://issues.apache.org/jira/browse/DRILL-6856
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.15.0
            Reporter: Anton Gozhiy
         Attachments: 0_0_0.parquet

*Data:*
A parquet file with a boolean column that contains null values.
An example is attached.

*Query:*

{code:sql}
select bool_col from dfs.tmp.`Test_data` where bool_col is true or bool_col is null
{code}

*Result:*
{noformat}
null
null
{noformat}

*Plan:*
{noformat}
00-00    Screen : rowType = RecordType(ANY bool_col): rowcount = 3.75, cumulative cost = {37.875 rows, 97.875 cpu, 15.0 io, 0.0 network, 0.0 memory}, id = 1980
00-01      Project(bool_col=[$0]) : rowType = RecordType(ANY bool_col): rowcount = 3.75, cumulative cost = {37.5 rows, 97.5 cpu, 15.0 io, 0.0 network, 0.0 memory}, id = 1979
00-02        SelectionVectorRemover : rowType = RecordType(ANY bool_col): rowcount = 3.75, cumulative cost = {33.75 rows, 93.75 cpu, 15.0 io, 0.0 network, 0.0 memory}, id = 1978
00-03          Filter(condition=[IS NULL($0)]) : rowType = RecordType(ANY bool_col): rowcount = 3.75, cumulative cost = {30.0 rows, 90.0 cpu, 15.0 io, 0.0 network, 0.0 memory}, id = 1977
00-04            Scan(table=[[dfs, tmp, Test_data]], groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/Test_data]], selectionRoot=maprfs:/tmp/Test_data, numFiles=1, numRowGroups=1, usedMetadataFile=false, columns=[`bool_col`]]]) : rowType = RecordType(ANY bool_col): rowcount = 15.0, cumulative cost = {15.0 rows, 15.0 cpu, 15.0 io, 0.0 network, 0.0 memory}, id = 1976
{noformat}

*Notes:* 
- "true" values were not included in the result though they should have.
- Result is correct if use "bool_col = true" instead of "is true"
- In the plan you can see that "is true" condition is absent in the Filter operator



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