[ https://issues.apache.org/jira/browse/DRILL-6378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Volodymyr Vysotskyi resolved DRILL-6378.
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Resolution: Fixed
Fixed in the scope of DRILL-6094
> MajorType passed into UDF with FieldReader has unset prec, scale for DECIMAL
> ----------------------------------------------------------------------------
>
> Key: DRILL-6378
> URL: https://issues.apache.org/jira/browse/DRILL-6378
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.13.0
> Reporter: Paul Rogers
> Assignee: Volodymyr Vysotskyi
> Priority: Major
>
> UDFs allow passing in a generic {{FieldReader}} such as for the {{typeof}} function.
I tried to modify the new {{sqlTypeOf()}} function to include the DECIMAL precision and scale,
something like: {{DECIMAL(9, 2)}}.
> But, the {{MajorType}} associated with the {{FieldReader}} has these values as 0. Not
sure if it is because the DECIMAL is the result of a cast, or if there is a deeper bug.
> Query:
> {noformat}
> ALTER SESSION SET `planner.enable_decimal_data_type` = true;
> SELECT sqlTypeof(CAST(a AS DECIMAL)) FROM (VALUES (1)) AS T(a);
> {noformat}
> Debug information for the {{MajorType}}
> {noformat}
> type TypeProtos$MajorType (id=151)
> precision_ 0
> scale_ 0
> {noformat}
> This bug is not simply a nuisance for formatting. The precision and scale are required
to make sense of any {{DECIMAL}} values that the function wants to process: without these
values, the function does not know the meaning of the {{DECIMAL}} data.
> Once this bug is fixed, reenable the type suffix code in {{UnionFunctions.extendType()}}.
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