hi,
我想将一个array<row>打散成多行，但是并没有成功
@FunctionHint(input =@DataTypeHint("ARRAY<ROW<rule_id STRING,rule_name
STRING,rule_type_name STRING,`result` INT,in_path BOOLEAN>>") ,output
= @DataTypeHint("ROW<rule_id STRING,rule_name STRING,rule_type_name
STRING,`result` INT,in_path BOOLEAN>"))
public static class FlatRowFunction extends TableFunction<Row> {
private static final long serialVersionUID = 1L;
public void eval(Row[] rows) {
for (Row row : rows) {
collect(row);
}
}
}
异常如下：
org.apache.flink.table.api.ValidationException: SQL validation failed.
>From line 1, column 149 to line 1, column 174: No match found for
function signature
flatRow(<RecordType:peek_no_expand(VARCHAR(2147483647) rule_id,
VARCHAR(2147483647) rule_name, VARCHAR(2147483647) rule_type_name,
INTEGER result, BOOLEAN in_path) ARRAY>)
at
org.apache.flink.table.planner.calcite.FlinkPlannerImpl.org$apache$flink$table$planner$calcite$FlinkPlannerImpl$$validate(FlinkPlannerImpl.scala:146)
at
org.apache.flink.table.planner.calcite.FlinkPlannerImpl.validate(FlinkPlannerImpl.scala:108)
at
org.apache.flink.table.planner.operations.SqlToOperationConverter.convert(SqlToOperationConverter.java:187)
at
org.apache.flink.table.planner.delegation.ParserImpl.parse(ParserImpl.java:78)
at
org.apache.flink.table.api.internal.TableEnvironmentImpl.sqlQuery(TableEnvironmentImpl.java:658)
at
com.akulaku.data.flink.ParserDataTest.parserDataTest(ParserDataTest.java:60)
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:498)
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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
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:68)
at
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.apache.calcite.runtime.CalciteContextException: From
line 1, column 149 to line 1, column 174: No match found for function
signature flatRow(<RecordType:peek_no_expand(VARCHAR(2147483647)
rule_id, VARCHAR(2147483647) rule_name, VARCHAR(2147483647)
rule_type_name, INTEGER result, BOOLEAN in_path) ARRAY>)
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:423)
at
org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:457)
at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:839)
at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:824)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.newValidationError(SqlValidatorImpl.java:5089)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.handleUnresolvedFunction(SqlValidatorImpl.java:1882)
at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:305)
at org.apache.calcite.sql.SqlFunction.deriveType(SqlFunction.java:218)
at
org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:5858)
at
org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:5845)
at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:139)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.deriveTypeImpl(SqlValidatorImpl.java:1800)
at
org.apache.calcite.sql.validate.ProcedureNamespace.validateImpl(ProcedureNamespace.java:57)
at
org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:84)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:1110)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1084)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateFrom(SqlValidatorImpl.java:3256)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateFrom(SqlValidatorImpl.java:3238)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateJoin(SqlValidatorImpl.java:3303)
at
org.apache.flink.table.planner.calcite.FlinkCalciteSqlValidator.validateJoin(FlinkCalciteSqlValidator.java:86)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateFrom(SqlValidatorImpl.java:3247)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3510)
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:1110)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1084)
at org.apache.calcite.sql.SqlSelect.validate(SqlSelect.java:232)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1059)
at
org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:766)
at
org.apache.flink.table.planner.calcite.FlinkPlannerImpl.org$apache$flink$table$planner$calcite$FlinkPlannerImpl$$validate(FlinkPlannerImpl.scala:141)
... 28 more
Caused by: org.apache.calcite.sql.validate.SqlValidatorException: No
match found for function signature
flatRow(<RecordType:peek_no_expand(VARCHAR(2147483647) rule_id,
VARCHAR(2147483647) rule_name, VARCHAR(2147483647) rule_type_name,
INTEGER result, BOOLEAN in_path) ARRAY>)
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:423)
at
org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:457)
at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:550)
... 56 more
godfrey he <godfre...@gmail.com> 于2020年7月21日周二 下午7:41写道：
> 可以，定义清楚 getResultType 和 getParameterTypes, 可以参考[1]
>
> [1]
>
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/functions/udfs.html#implementation-guide
>
>
> Dream-底限 <zhan...@akulaku.com> 于2020年7月21日周二 下午7:25写道：
>
> > hi
> >
> >
> 我这面在定义一个表函数，通过继承TableFunction完成操作，但是eval方法中的参数类型都是java基本类型（至少看到的demo都是如此），想问一下eval方法中可以传flink
> > 内部类型吗，比如说我想在eval()方法中传递Row类型要怎么操作，eval(Row row)
> >
>
