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https://issues.apache.org/jira/browse/HIVE-28207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shohei Okumiya updated HIVE-28207:
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Status: Patch Available (was: Open)
> NullPointerException is thrown when checking column uniqueness
> --------------------------------------------------------------
>
> Key: HIVE-28207
> URL: https://issues.apache.org/jira/browse/HIVE-28207
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 4.0.0
> Reporter: Shohei Okumiya
> Assignee: Shohei Okumiya
> Priority: Major
> Labels: pull-request-available
>
> In some cases, we skip checking null. For example, the last statement in the
> following set of queries fails with NPE.
> {code:java}
> CREATE TABLE `store_sales` (`ss_item_sk` bigint);
> CREATE TABLE `household_demographics` (`hd_demo_sk` bigint);
> CREATE TABLE `item` (`i_item_sk` bigint);
> ALTER TABLE `store_sales` ADD CONSTRAINT `pk_ss` PRIMARY KEY (`ss_item_sk`)
> DISABLE NOVALIDATE RELY;
> ALTER TABLE `item` ADD CONSTRAINT `pk_i` PRIMARY KEY (`i_item_sk`) DISABLE
> NOVALIDATE RELY;
> ALTER TABLE `store_sales` ADD CONSTRAINT `ss_i` FOREIGN KEY (`ss_item_sk`)
> REFERENCES `item`(`i_item_sk`) DISABLE NOVALIDATE RELY;
> EXPLAIN
> SELECT i_item_sk
> FROM store_sales, household_demographics, item
> WHERE ss_item_sk = i_item_sk {code}
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