Flink 1.11 SQL作业中调用UDTF 出现“No match found for func

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 { 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( , ) 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( , ) 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( , ) 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。*来自志愿者整理的flink邮件归档