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https://issues.apache.org/jira/browse/DRILL-5329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Rogers updated DRILL-5329:
-------------------------------
Description:
A unit test was created to exercise the "Sorter" mechanism within the External
Sort, which is used to sort each incoming batch. The sorter was tested with
each Drill data type.
The following types fail:
* TinyInt
* UInt1
The failure manifests on one of two ways:
* If dynamic UDFs are enabled, the query crashes with an NPE. (See DRILL-5331.)
* If dynamic UDFs are disabled, the generated code silently skips the
comparison step, resulting in the sort not actually being done:
Sorting a set of 20-pseudo-random rows produces the following output:
{code}
#, row #, key, value
0(0): 11, "0"
1(1): 14, "1"
2(2): 17, "2"
3(3): 0, "3"
{code}
The first number is the row index, the second is the row pointed to by the sv2
(which should be written to create sort order). Sort was done ASC, NULLS_HIGH,
by the key field.
A strong concern here is that there is no error or other warning to the user
that Drill cannot sort this type; Drill just silently declines to perform the
operation.
was:
A unit test was created to exercise the "Sorter" mechanism within the External
Sort, which is used to sort each incoming batch. The sorter was tested with
each Drill data type.
The following types fail:
* TinyInt
> External sort does not support "obscure" numeric types
> ------------------------------------------------------
>
> Key: DRILL-5329
> URL: https://issues.apache.org/jira/browse/DRILL-5329
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.10.0
> Reporter: Paul Rogers
>
> A unit test was created to exercise the "Sorter" mechanism within the
> External Sort, which is used to sort each incoming batch. The sorter was
> tested with each Drill data type.
> The following types fail:
> * TinyInt
> * UInt1
> The failure manifests on one of two ways:
> * If dynamic UDFs are enabled, the query crashes with an NPE. (See
> DRILL-5331.)
> * If dynamic UDFs are disabled, the generated code silently skips the
> comparison step, resulting in the sort not actually being done:
> Sorting a set of 20-pseudo-random rows produces the following output:
> {code}
> #, row #, key, value
> 0(0): 11, "0"
> 1(1): 14, "1"
> 2(2): 17, "2"
> 3(3): 0, "3"
> {code}
> The first number is the row index, the second is the row pointed to by the
> sv2 (which should be written to create sort order). Sort was done ASC,
> NULLS_HIGH, by the key field.
> A strong concern here is that there is no error or other warning to the user
> that Drill cannot sort this type; Drill just silently declines to perform the
> operation.
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