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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2019/06/10 12:16:35 UTC
[GitHub] [flink] hequn8128 commented on a change in pull request #8493:
[FLINK-12562][table] Improve code in ExpandColumnFunctionsRule
hequn8128 commented on a change in pull request #8493: [FLINK-12562][table] Improve code in ExpandColumnFunctionsRule
URL: https://github.com/apache/flink/pull/8493#discussion_r291987130
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File path: flink-table/flink-table-planner/src/main/java/org/apache/flink/table/expressions/rules/ExpandColumnFunctionsRule.java
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@@ -193,7 +190,7 @@ public ColumnsExpressionExpander(List<UnresolvedReferenceExpression> inputFieldR
@Override
protected List<UnresolvedReferenceExpression> defaultMethod(Expression expression) {
- throw new TableException(
+ throw new ValidationException(
String.format("The parameters of %s() or %s() only accept column name or column " +
Review comment:
Maybe `Preconditions.checkArgument` can also be used to validate user input, such as the checkArgument in `org.apache.flink.streaming.api.environment.StreamExecutionEnvironment`. However, I think it also makes sense to change the `Preconditions.checkArgument` to ValidationException. I will update the PR according to your suggestions.
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