我感觉这应该是新版本的udf的bug，我在本地也可以复现。 已经建了一个issue[1] 来跟进。
[1] https://issues.apache.org/jira/browse/FLINK-18520 邹云鹤 <[email protected]> 于2020年7月7日周二 下午9:43写道： > > > hi all > 本人基于Flink 1.11 SNAPSHOT 在 Flink sql 作业中使用 UDTF, UDTF 的定义如下： > > > @FunctionHint( > input = {@DataTypeHint("STRING"), @DataTypeHint("STRING")}, > output = @DataTypeHint("STRING") > ) > public class Split extends TableFunction<String> { > public Split(){} > public void eval(String str, String ch) { > if (str == null || str.isEmpty()) { > return; > } else { > String[] ss = str.split(ch); > for (String s : ss) { > collect(s); > } > } > } > } > > > 在flink sql中通过 create function splitByChar as '**.**.Split' > 来创建这个function，在tableEnv 中调用executeSql(....) 来完成对这个 function的注册，在sql > 后面的计算逻辑中 通过以下方式来调用这个UDTF > create view view_source_1 as select `dateTime，`itime`, > lng,lat,net,event_info, cast(split_index(T.s, '_', 0) as int) as time_page > from view_source as a left join LATERAL TABLE (splitByChar('a,b,c',',')) as > T(s) on true; > > > 结果一直出现以下错误信息： > org.apache.flink.table.api.ValidationException: SQL validation failed. > From line 3, column 25 to line 3, column 47: No match found for function > signature splitByChar(<CHARACTER>, <CHARACTER>) > 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:66) > at > org.apache.flink.table.api.internal.TableEnvironmentImpl.sqlQuery(TableEnvironmentImpl.java:629) > .................... > Caused by: org.apache.calcite.runtime.CalciteContextException: From line > 3, column 25 to line 3, column 47: r(<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: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) > ... 8 more > Caused by: org.apache.calcite.sql.validate.SqlValidatorException: No match > found for function signature splitByChar(<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:423) > at > org.apache.calcite.runtime.Resources$ExInstWithCause.ex(Resources.java:457) > at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:550) > > > 之前在flink 1.10 里面使用是正常的， 问下各位大佬有没有在flink 1.11 遇到过这个错误， 麻烦提供一下帮助。 > | | > 邹云鹤 > | > | > [email protected] > | > 签名由网易邮箱大师定制 -- Best, Benchao Li
