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https://issues.apache.org/jira/browse/FLINK-2985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15322761#comment-15322761
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ASF GitHub Bot commented on FLINK-2985:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2078#discussion_r66469727
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/operators/UnionOperator.java
---
@@ -43,11 +42,6 @@
public UnionOperator(DataSet<T> input1, DataSet<T> input2, String
unionLocationName) {
super(input1, input2, input1.getType());
- if (!input1.getType().equals(input2.getType())) {
--- End diff --
This check is crucial for the DataSet API and must remain in place.
> Allow different field names for unionAll() in Table API
> -------------------------------------------------------
>
> Key: FLINK-2985
> URL: https://issues.apache.org/jira/browse/FLINK-2985
> Project: Flink
> Issue Type: Improvement
> Components: Table API
> Reporter: Timo Walther
> Priority: Minor
>
> The recently merged `unionAll` operator checks if the field names of the left
> and right side are equal. Actually, this is not necessary. The union operator
> in SQL checks only the types and uses the names of left side.
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