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https://issues.apache.org/jira/browse/CALCITE-4811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-4811:
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Labels: pull-request-available (was: )
> 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
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Case to reproduce
> {code:sql}
> select coalesce(null, row(1));
> {code}
> This and other similar queries fail with
> {noformat}
> 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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