[
https://issues.apache.org/jira/browse/DRILL-6588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539397#comment-16539397
]
ASF GitHub Bot commented on DRILL-6588:
---------------------------------------
kkhatua commented on issue #1371: DRILL-6588: Make Sys tables of nullable
datatypes
URL: https://github.com/apache/drill/pull/1371#issuecomment-404005272
@paul-rogers I've made the changes to use Java's Annotation class `Nonnull`
Please review the rest of the changes.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
> System table columns incorrectly marked as non-nullable
> --------------------------------------------------------
>
> Key: DRILL-6588
> URL: https://issues.apache.org/jira/browse/DRILL-6588
> Project: Apache Drill
> Issue Type: Bug
> Components: Metadata
> Affects Versions: 1.13.0
> Reporter: Aman Sinha
> Assignee: Kunal Khatua
> Priority: Major
> Fix For: 1.14.0
>
>
> System table columns can contain null values but they are incorrectly marked
> as non-nullable as shown in example table below:
> {noformat}
> 0: jdbc:drill:drillbit=10.10.10.191> describe sys.boot;
> +-------------------+--------------------+--------------+
> | COLUMN_NAME | DATA_TYPE | IS_NULLABLE |
> +-------------------+--------------------+--------------+
> | name | CHARACTER VARYING | NO |
> | kind | CHARACTER VARYING | NO |
> | accessibleScopes | CHARACTER VARYING | NO |
> | optionScope | CHARACTER VARYING | NO |
> | status | CHARACTER VARYING | NO |
> | num_val | BIGINT | NO |
> | string_val | CHARACTER VARYING | NO |
> | bool_val | BOOLEAN | NO |
> | float_val | DOUBLE | NO |
> +-------------------+--------------------+--------------+{noformat}
>
> Note that several columns are nulls:
> {noformat}
> +---------------------------------------------------+----------+------------------+-------------+--------+---------+------------+----------+-----------+
> | name | kind |
> accessibleScopes | optionScope | status | num_val | string_val | bool_val |
> float_val |
> +---------------------------------------------------+----------+------------------+-------------+--------+---------+------------+----------+-----------+
> drill.exec.options.exec.udf.enable_dynamic_support | BOOLEAN | BOOT | BOOT |
> BOOT | null | null | true | null |{noformat}
>
> Because of the not-null metadata, the predicates on these tables such as
> `WHERE <column> IS NULL` evaluate to FALSE which is incorrect.
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
