[jira] [Created] (CALCITE-3299) Handle validating exception for SqlNode of select star converted by RelNode

["Wang Weidong (Jira)" <ji...@apache.org>]

Wang Weidong created CALCITE-3299:
-------------------------------------

             Summary: Handle validating exception for SqlNode of select star converted by RelNode 
                 Key: CALCITE-3299
                 URL: https://issues.apache.org/jira/browse/CALCITE-3299
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.21.0
            Reporter: Wang Weidong
            Assignee: Wang Weidong


h4. Procedure to reproduce the problem:
 - create table {{~^t^~}}
 - parse query  ^{{~select * from t~}}^ to SqlNode
 - convert SqlNode to RelNode
 - convert RelNode to SqlNode
 - validate the result SqlNode

test code is like this
{code:java}
// code placeholder
@Test
public void testSelectAll() throws Exception {
  try (Statement s = parserContext.getStatement()) {
    s.execute("create table if not exists t (i int not null)");

    String sql = "select * from t";
    SqlNode sqlNode = parserContext.parseStmt(sql);
    parserContext.getSqlValidator().validate(sqlNode);
    RelNode relNode = parserContext.getSqlToRelConverter().convertQuery(sqlNode, true, true).rel;
    SqlNode sqlNodeNew = toSqlNode(relNode);
    parserContext.getSqlValidator().validate(sqlNodeNew);
  }
}
{code}
Finally we will get an exception as follow:
{code:java}
// code placeholder
org.apache.calcite.rel.rel2sql.SqlImplementor#wrapSelectorg.apache.calcite.rel.rel2sql.SqlImplementor#wrapSelectjava.lang.NullPointerException at org.apache.calcite.sql.validate.AggFinder.findAgg(AggFinder.java:58) at org.apache.calcite.sql.validate.SqlValidatorImpl.getAgg(SqlValidatorImpl.java:2774) at org.apache.calcite.sql.validate.SqlValidatorImpl.getAggregate(SqlValidatorImpl.java:2761) at org.apache.calcite.sql.validate.SqlValidatorImpl.isAggregate(SqlValidatorImpl.java:2720) at org.apache.calcite.sql.validate.SqlValidatorImpl.registerQuery(SqlValidatorImpl.java:2406) at org.apache.calcite.sql.validate.SqlValidatorImpl.registerQuery(SqlValidatorImpl.java:2326) at org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:916) at org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:628) at org.apache.calcite.test.OptimizeTest.testSelectAll(OptimizeTest.java:206) 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$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239) at org.junit.rules.RunRules.evaluate(RunRules.java:20) 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$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
{code}



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