[jira] [Created] (CALCITE-4811) Coalesce(null, row) fails with NPE

["Sergey Nuyanzin (Jira)" <ji...@apache.org>]

Sergey Nuyanzin created CALCITE-4811:
----------------------------------------

             Summary: Coalesce(null, row) fails with NPE
                 Key: CALCITE-4811
                 URL: https://issues.apache.org/jira/browse/CALCITE-4811
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.27.0
            Reporter: Sergey Nuyanzin


Case to reproduce
{code:sql}
select coalesce(null,  row(1));
{code}
This and other similar queries fail with
{noformat}
java.sql.SQLException: Error while executing SQL "select coalesce(null,  row(1))": 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.AvaticaStatement.executeInternal(AvaticaStatement.java:163)
	at org.apache.calcite.avatica.AvaticaStatement.execute(AvaticaStatement.java:217)
	at sqlline.Commands.executeSingleQuery(Commands.java:1130)
	at sqlline.Commands.execute(Commands.java:1079)
	at sqlline.Commands.sql(Commands.java:1033)
	at sqlline.SqlLine.dispatch(SqlLine.java:822)
	at sqlline.SqlLine.begin(SqlLine.java:596)
	at sqlline.SqlLine.start(SqlLine.java:269)
	at sqlline.SqlLine.main(SqlLine.java:208)
Caused by: java.lang.NullPointerException
	at org.apache.calcite.rel.type.RelDataTypeImpl.getFieldCount(RelDataTypeImpl.java:175)
	at org.apache.calcite.rel.type.RelDataTypeFactoryImpl.leastRestrictiveStructuredType(RelDataTypeFactoryImpl.java:228)
	at org.apache.calcite.sql.type.SqlTypeFactoryImpl.leastRestrictiveSqlType(SqlTypeFactoryImpl.java:292)
	at org.apache.calcite.sql.type.SqlTypeFactoryImpl.leastRestrictive(SqlTypeFactoryImpl.java:160)
	at org.apache.calcite.sql.fun.SqlCaseOperator.inferTypeFromValidator(SqlCaseOperator.java:263)
	at org.apache.calcite.sql.fun.SqlCaseOperator.inferReturnType(SqlCaseOperator.java:225)
	at org.apache.calcite.sql.SqlOperator.validateOperands(SqlOperator.java:502)
	at org.apache.calcite.sql.fun.SqlCaseOperator.deriveType(SqlCaseOperator.java:172)
	at org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:6277)
	at org.apache.calcite.sql.validate.SqlValidatorImpl$DeriveTypeVisitor.visit(SqlValidatorImpl.java:6264)
	at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:161)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.deriveTypeImpl(SqlValidatorImpl.java:1862)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.deriveType(SqlValidatorImpl.java:1847)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.inferUnknownTypes(SqlValidatorImpl.java:2019)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.expandSelectItem(SqlValidatorImpl.java:461)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelectList(SqlValidatorImpl.java:4409)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validateSelect(SqlValidatorImpl.java:3652)
	at org.apache.calcite.sql.validate.SelectNamespace.validateImpl(SelectNamespace.java:64)
	at org.apache.calcite.sql.validate.AbstractNamespace.validate(AbstractNamespace.java:89)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validateNamespace(SqlValidatorImpl.java:1100)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validateQuery(SqlValidatorImpl.java:1071)
	at org.apache.calcite.sql.SqlSelect.validate(SqlSelect.java:247)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validateScopedExpression(SqlValidatorImpl.java:1046)
	at org.apache.calcite.sql.validate.SqlValidatorImpl.validate(SqlValidatorImpl.java:752)
	at org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:585)
	at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:251)
	at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:215)
	at org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:647)
	at org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:513)
	at org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:483)
	at org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:249)
	at org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:623)
	at org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:675)
	at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
	... 8 more

{noformat}




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