group by alias name

大家好！
    碰到一个奇怪的问题，group by的字段里面不能用 AS 后的字段名，请高手帮忙看看为什么。 代码如下：

        EnvironmentSettings settings = EnvironmentSettings.newInstance().useBlinkPlanner().inBatchMode().build();
        TableEnvironment tEnv = TableEnvironment.create(settings);

        // register Table from filesystem source
        tEnv.executeSql("CREATE TABLE transactions (\n" +
                "    account_id  BIGINT,\n" +
                "    amount      BIGINT,\n" +
                "    transaction_time TIMESTAMP(3)" +
//                ",\n" +
//                "    WATERMARK FOR transaction_time AS transaction_time - INTERVAL '5' SECOND" +
                "\n" +
                ") WITH (\n" +
                "    'connector' = 'filesystem',\n" +
                "    'path'      = 'file:///cache1/data/flink/test/input',\n" +
                "    'format'    = 'csv',\n" +
                "    'csv.field-delimiter'    = ','\n" +
                ")");

        // register Table for filesystem sink
        tEnv.executeSql("CREATE TABLE spend_report (\n" +
                "    account_id BIGINT,\n" +
                "    log_ts     TIMESTAMP(3),\n" +
                "    amount     BIGINT\n" +
                ") WITH (\n" +
                "    'connector' = 'filesystem',\n" +
                "    'path'      = 'file:///cache1/data/flink/test/output',\n" +
                "    'format'    = 'csv',\n" +
                "    'csv.field-delimiter'    = ','\n" +
                ")");

        tEnv.executeSql(
                "INSERT INTO spend_report " +
                        "SELECT account_id, FLOOR(transaction_time TO HOUR) AS log_ts, SUM(amount) AS amount " +
                        "FROM transactions " +
                        "GROUP BY account_id,log_ts"
        );

报错如下：
org.apache.flink.table.api.ValidationException: SQL validation failed. From line 1, column 148 to line 1, column 153: Column 'log_ts' not found in any table

at org.apache.flink.table.planner.calcite.FlinkPlannerImpl.org$apache$flink$table$planner$calcite$FlinkPlannerImpl$$validate(FlinkPlannerImpl.scala:152)
at org.apache.flink.table.planner.calcite.FlinkPlannerImpl.validate(FlinkPlannerImpl.scala:111)
at org.apache.flink.table.planner.operations.SqlToOperationConverter.convert(SqlToOperationConverter.java:189)
at org.apache.flink.table.planner.operations.SqlToOperationConverter.convertSqlInsert(SqlToOperationConverter.java:564)
at org.apache.flink.table.planner.operations.SqlToOperationConverter.convert(SqlToOperationConverter.java:248)
at org.apache.flink.table.planner.delegation.ParserImpl.parse(ParserImpl.java:77)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:660)
at org.apache.flink.playgrounds.spendreport.SpendReportTest.testReport1(SpendReportTest.java:131)
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.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.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
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:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
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 com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:128)
Caused by: org.apache.calcite.runtime.CalciteContextException: From line 1, column 148 to line 1, column 153: Column 'log_ts' not found in any table
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:467)
at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:883)
at org.apache.calcite.sql.SqlUtil.newContextException(SqlUtil.java:868)
at org.apache.calcite.sql.validate.SqlValidatorImpl.newValidationError(SqlValidatorImpl.java:5043)
at org.apache.calcite.sql.validate.DelegatingScope.fullyQualify(DelegatingScope.java:259)
at org.apache.calcite.sql.validate.SqlValidatorImpl$Expander.visit(SqlValidatorImpl.java:6015)
at org.apache.calcite.sql.validate.SqlValidatorImpl$ExtendedExpander.visit(SqlValidatorImpl.java:6242)
at org.apache.calcite.sql.validate.SqlValidatorImpl$ExtendedExpander.visit(SqlValidatorImpl.java:6187)
at org.apache.calcite.sql.SqlIdentifier.accept(SqlIdentifier.java:320)
at org.apache.calcite.sql.validate.SqlValidatorImpl.expandGroupByOrHavingExpr(SqlValidatorImpl.java:5620)
at org.apache.calcite.sql.validate.SqlValidatorImpl.validateGroupClause(SqlValidatorImpl.java:4044)
at org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3465)
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:1067)
at org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1041)
at org.apache.calcite.sql.SqlSelect.validate(SqlSelect.java:232)
at org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1016)
at org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:724)
at org.apache.flink.table.planner.calcite.FlinkPlannerImpl.org$apache$flink$table$planner$calcite$FlinkPlannerImpl$$validate(FlinkPlannerImpl.scala:147)
... 42 more
Caused by: org.apache.calcite.sql.validate.SqlValidatorException: Column 'log_ts' not found in any table
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$ExInstWithCause.ex(Resources.java:467)
at org.apache.calcite.runtime.Resources$ExInst.ex(Resources.java:560)
... 61 more


但是如果改成：
        tEnv.executeSql(
                "INSERT INTO spend_report " +
                        "SELECT account_id, FLOOR(transaction_time TO HOUR) AS log_ts, SUM(amount) AS amount " +
                        "FROM transactions " +
                        "GROUP BY account_id,FLOOR(transaction_time TO HOUR)"
        );
却可以正常运行。




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