Major Description
Test case (in JdbcTest):
@Test public void testSqlAdvisorNonExistingColumn() throws SQLException, ClassNotFoundException { adviseSql("select e.empid.^ from \"hr\".\"emps\" e", CalciteAssert.checkResultUnordered( "id=; names=null; type=MATCH", "id=hr.dependents; names=[hr, dependents]; type=TABLE", "id=hr.depts; names=[hr, depts]; type=TABLE", "id=hr.emps; names=[hr, emps]; type=TABLE", "id=hr.locations; names=[hr, locations]; type=TABLE", "id=hr; names=[hr]; type=SCHEMA")); }
SqlValidatorNamespace lookupFieldNamespace(RelDataType rowType, String name) { final SqlNameMatcher nameMatcher = catalogReader.nameMatcher(); final RelDataTypeField field = nameMatcher.field(rowType, name); return new FieldNamespace(this, field.getType()); // <-- NPE }
It looks like null-check for field resolves the exception and it suggests
id=*; names=[*]; type=KEYWORD id=; names=null; type=MATCH
Original exception:
java.sql.SQLException: exception while executing query: null at org.apache.calcite.avatica.Helper.createException(Helper.java:56) at org.apache.calcite.avatica.Helper.createException(Helper.java:41) at org.apache.calcite.avatica.AvaticaConnection.executeQueryInternal(AvaticaConnection.java:577) at org.apache.calcite.avatica.AvaticaPreparedStatement.executeQuery(AvaticaPreparedStatement.java:137) at org.apache.calcite.test.JdbcTest.adviseSql(JdbcTest.java:411) at org.apache.calcite.test.JdbcTest.testSqlAdvisorNonExistingColumn(JdbcTest.java:344) 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$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$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)
Caused by: java.lang.NullPointerException at org.apache.calcite.sql.validate.SqlValidatorImpl.lookupFieldNamespace(SqlValidatorImpl.java:4835) at org.apache.calcite.sql.validate.AbstractNamespace.lookupChild(AbstractNamespace.java:144) at org.apache.calcite.sql.validate.IdentifierNamespace.lookupChild(IdentifierNamespace.java:42) at org.apache.calcite.sql.validate.SqlValidatorImpl.lookupNameCompletionHints(SqlValidatorImpl.java:800) at org.apache.calcite.sql.validate.SqlValidatorImpl.lookupSelectHints(SqlValidatorImpl.java:690) at org.apache.calcite.sql.validate.SqlValidatorImpl.lookupSelectHints(SqlValidatorImpl.java:701) at org.apache.calcite.sql.validate.SqlValidatorImpl.lookupHints(SqlValidatorImpl.java:655) at org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints(SqlAdvisor.java:235) at org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints0(SqlAdvisor.java:182) at org.apache.calcite.sql.advise.SqlAdvisor.getCompletionHints(SqlAdvisor.java:142) at org.apache.calcite.sql.advise.SqlAdvisorGetHintsFunction.getCompletionHints(SqlAdvisorGetHintsFunction.java:105) at Baz.bind(Unknown Source) at org.apache.calcite.jdbc.CalcitePrepare$CalciteSignature.enumerable(CalcitePrepare.java:356) at org.apache.calcite.jdbc.CalciteConnectionImpl.enumerable(CalciteConnectionImpl.java:309) at org.apache.calcite.jdbc.CalciteMetaImpl._createIterable(CalciteMetaImpl.java:506) at org.apache.calcite.jdbc.CalciteMetaImpl.createIterable(CalciteMetaImpl.java:497) at org.apache.calcite.avatica.AvaticaResultSet.execute(AvaticaResultSet.java:182) at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:64) at org.apache.calcite.jdbc.CalciteResultSet.execute(CalciteResultSet.java:43) at org.apache.calcite.avatica.AvaticaConnection.executeQueryInternal(AvaticaConnection.java:573) ... 25 more