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https://issues.apache.org/jira/browse/CALCITE-1905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16105797#comment-16105797
]
Julian Hyde commented on CALCITE-1905:
--------------------------------------
I think we should label this as 'won't fix'. It adds too much complexity. If
people need varargs behavior, they can write a SqlOperator.
> Varargs in user-defined functions
> ---------------------------------
>
> Key: CALCITE-1905
> URL: https://issues.apache.org/jira/browse/CALCITE-1905
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.13.0
> Environment:
> Reporter: yuqi
> Assignee: Julian Hyde
>
> {code:java}
> i define a udf with variable paramater in Smalls.java like
> public static String variableParameterFunction(String... strings) {
> String result = "";
> if (strings == null) {
> return result;
> }
> for (String s : strings) {
> result += s;
> }
> return result;
> }
> {code}
> then i use it in UdfTest.java
>
> {code:java}
> with.query("select \"adhoc\".\"variableParameterFunction\"('test',
> 'test')").returns("EXPR$0=testtest\n");
> {code}
> {code:java}
> will get the following error
> ava.lang.RuntimeException: exception while executing [select
> "adhoc"."variableParameterFunction"('test', 'test')]
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1270)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1249)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1213)
> at
> org.apache.calcite.test.UdfTest.testDateAndTimestamp(UdfTest.java:831)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:497)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
> Caused by: java.lang.RuntimeException: With materializationsEnabled=false,
> limit=0
> at
> org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:549)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1266)
> ... 30 more
> Caused by: java.sql.SQLException: Error while executing SQL "select
> "adhoc"."variableParameterFunction"('test', 'test')": From line 1, column 16
> to line 1, column 58: No match found for function signature
> variableParameterFunction(<CHARACTER>, <CHARACTER>)
> at org.apache.calcite.avatica.Helper.createException(Helper.java:56)
> at org.apache.calcite.avatica.Helper.createException(Helper.java:41)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:218)
> at
> org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:517)
> ... 31 more
> Caused by: org.apache.calcite.runtime.CalciteContextException: From line 1,
> column 16 to line 1, column 58: No match found for function signature
> variableParameterFunction(<CHARACTER>, <CHARACTER>)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at
> org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:463)
> at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:804)
> at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:789)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.newValidationError(SqlValidatorImpl.java:4393)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.handleUnresolvedFunction(SqlValidatorImpl.java:1672)
> at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:278)
> at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:223)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:5039)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:5026)
> at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:137)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.deriveTypeImpl(SqlValidatorImpl.java:1588)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.deriveType(SqlValidatorImpl.java:1573)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.expandSelectItem(SqlValidatorImpl.java:455)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelectList(SqlValidatorImpl.java:3696)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3193)
> at
> org.apache.calcite.sql.validate.SelectNamespace.validateImpl(SelectNamespace.java:60)
> at
> org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:84)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:939)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:920)
> at org.apache.calcite.sql.SqlSelect.validate(SqlSelect.java:220)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:895)
> at
> org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:605)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:551)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:264)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:228)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:784)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:639)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:609)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:214)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:603)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:638)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:149)
> ... 33 more
> Caused by: org.apache.calcite.sql.validate.SqlValidatorException: No match
> found for function signature variableParameterFunction(<CHARACTER>,
> <CHARACTER>)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
> at
> org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:463)
> at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:572)
> ... 64 more
> {code}
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