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https://issues.apache.org/jira/browse/CALCITE-5407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17675990#comment-17675990
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Tim Nieradzik commented on CALCITE-5407:
----------------------------------------
Apologies for the delay! I have updated the commit.
> MongoDB: Invalid ARRAY conversion
> ---------------------------------
>
> Key: CALCITE-5407
> URL: https://issues.apache.org/jira/browse/CALCITE-5407
> Project: Calcite
> Issue Type: Bug
> Components: mongodb-adapter
> Affects Versions: 1.32.0
> Reporter: Tim Nieradzik
> Assignee: Tim Nieradzik
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.33.0
>
>
> When using the MongoDB adapter, the following conversion does not work as
> expected:
> {code}
> cast(_MAP['arr'] as VARCHAR ARRAY)
> {code}
> This throws the following exception:
> {noformat}
> Caused by: java.lang.NullPointerException: componentType of ITEM($0, 'arr')
> at java.base/java.util.Objects.requireNonNull(Objects.java:347)
> at
> org.apache.calcite.sql2rel.StandardConvertletTable.convertCast(StandardConvertletTable.java:603)
> at
> org.apache.calcite.sql2rel.SqlNodeToRexConverterImpl.convertCall(SqlNodeToRexConverterImpl.java:59)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:5547)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4711)
> at org.apache.calcite.sql.SqlCall.accept(SqlCall.java:161)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.convertExpression(SqlToRelConverter.java:5360)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectList(SqlToRelConverter.java:4524)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:756)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:677)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:3741)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:597)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:257)
> at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:220)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:651)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:517)
> at
> org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:487)
> at
> org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:236)
> at
> org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:623)
> at
> org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:677)
> at
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:156)
> ... 67 more
> {noformat}
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