[jira] [Commented] (CALCITE-6361) Uncollect.deriveUncollectRowType crashes if the input data is not a collection

[Mihai Budiu (Jira)]

    [ 
https://issues.apache.org/jira/browse/CALCITE-6361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17836363#comment-17836363
 ] 

Mihai Budiu commented on CALCITE-6361:
--------------------------------------

This is an assertion failure:

{code:java}
        RelDataType ret = field.getType().getComponentType();
        assert null != ret;
{code}

The top of the stack trace is:
{code:java}
        at 
org.apache.calcite.rel.core.Uncollect.deriveUncollectRowType(Uncollect.java:171)
        at 
org.apache.calcite.rel.core.Uncollect.deriveRowType(Uncollect.java:127)
        at org.apache.calcite.rel.core.Uncollect.<init>(Uncollect.java:78)
        at org.apache.calcite.tools.RelBuilder.uncollect(RelBuilder.java:2254)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertUnnest(SqlToRelConverter.java:2480)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2436)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2334)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2296)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertJoin(SqlToRelConverter.java:3182)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2417)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertFrom(SqlToRelConverter.java:2296)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:709)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:690)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:3769)
        at 
org.apache.calcite.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:610)
{code}

I will try to post here a test to reproduce. Mine is currently a bit involved 
using several "CREATE TYPE statements"

> Uncollect.deriveUncollectRowType crashes if the input data is not a collection
> ------------------------------------------------------------------------------
>
>                 Key: CALCITE-6361
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6361
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.37.0
>            Reporter: Mihai Budiu
>            Priority: Minor
>
> This happens because the type checker calls getComponentType() without 
> checking first that the field type has components. It should report an error 
> in such a case.



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