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https://issues.apache.org/jira/browse/DRILL-7615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17049864#comment-17049864
]
ASF GitHub Bot commented on DRILL-7615:
---------------------------------------
paul-rogers commented on pull request #2006: DRILL-7615: UNION ALL query
returns the wrong result for the decimal value
URL: https://github.com/apache/drill/pull/2006#discussion_r386777176
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/union/UnionAllRecordBatch.java
##########
@@ -184,38 +184,43 @@ private void createUnionAller(RecordBatch inputBatch) {
ValueVector vvIn = vw.getValueVector();
ValueVector vvOut = container.getValueVector(index).getValueVector();
- final ErrorCollector collector = new ErrorCollectorImpl();
- // According to input data names, Minortypes, Datamodes, choose to
+ MaterializedField inField = vvIn.getField();
+ MaterializedField outputField = vvOut.getField();
+
+ ErrorCollector collector = new ErrorCollectorImpl();
+ // According to input data names, MinorTypes, DataModes, choose to
// transfer directly,
// rename columns or
- // cast data types (Minortype or DataMode)
- if
(container.getSchema().getColumn(index).hasSameTypeAndMode(vvIn.getField())
- && vvIn.getField().getType().getMinorType() !=
TypeProtos.MinorType.MAP // Per DRILL-5521, existing bug for map transfer
- ) {
+ // cast data types (MinorType or DataMode)
+ if (outputField.hasSameTypeAndMode(inField)
Review comment:
Nit: Seems cleaner to add this predicate to `Types`: `isSameTypeAndMode()`,
then say:
```
if (Types.isSameTypeAndMode(outputField.getType(), inputField.getType()) {
```
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> UNION ALL query returns the wrong result for the decimal value
> --------------------------------------------------------------
>
> Key: DRILL-7615
> URL: https://issues.apache.org/jira/browse/DRILL-7615
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.14.0
> Reporter: Vova Vysotskyi
> Assignee: Vova Vysotskyi
> Priority: Major
> Labels: ready-to-commit
> Fix For: 1.18.0
>
>
> The following query:
> {code:java}
> select cast(1000 as decimal(10,1))
> union all
> select 596.000
> {code}
> returns incorrect result:
> {code:java}
> 10.000
> 596.000
> {code}
> The expected result is 1000.000 for the first record.
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