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https://issues.apache.org/jira/browse/FLINK-7558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16146936#comment-16146936
]
ASF GitHub Bot commented on FLINK-7558:
---------------------------------------
Github user wuchong commented on a diff in the pull request:
https://github.com/apache/flink/pull/4620#discussion_r136014510
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/validation/UserDefinedFunctionValidationTest.scala
---
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.flink.table.api.validation
+
+import org.apache.flink.api.scala._
+import org.apache.flink.table.api.ValidationException
+import org.apache.flink.table.api.scala._
+import org.apache.flink.table.expressions.utils.Func0
+import org.apache.flink.table.utils.TableTestBase
+import org.junit.Test
+
+class UserDefinedFunctionValidationTest extends TableTestBase {
--- End diff --
We can add the test to `ScalarFunctionsValidationTest`.
> Improve SQL ValidationException message.
> ----------------------------------------
>
> Key: FLINK-7558
> URL: https://issues.apache.org/jira/browse/FLINK-7558
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> org.apache.flink.table.api.ValidationException: SQL validation failed.
> Operand types of could not be inferred. at
> org.apache.flink.table.calcite.FlinkPlannerImpl.validate(FlinkPlannerImpl.scala:91)
> at
> org.apache.flink.table.api.TableEnvironment.sql(TableEnvironment.scala:513)
> at
> com.alibaba.blink.scala.tool.util.SqlJobAdapter.dealInserts(SqlJobAdapter.java:292)
> at
> com.alibaba.blink.scala.tool.util.JobBuildHelper.buildSqlJob(JobBuildHelper.java:80)
> at com.alibaba.blink.scala.tool.JobLauncher.main(JobLauncher.java:138)
> Caused by: org.apache.flink.table.api.ValidationException: Operand types of
> could not be inferred. at
> org.apache.flink.table.functions.utils.ScalarSqlFunction$$anon$2$$anonfun$2.apply(ScalarSqlFunction.scala:110)
> at
> org.apache.flink.table.functions.utils.ScalarSqlFunction$$anon$2$$anonfun$2.apply(ScalarSqlFunction.scala:110)
> at scala.Option.getOrElse(Option.scala:121) at
> org.apache.flink.table.functions.utils.ScalarSqlFunction$$anon$2.inferOperandTypes(ScalarSqlFunction.scala:110)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.inferUnknownTypes(SqlValidatorImpl.java:1769)
> at
> ....
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