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https://issues.apache.org/jira/browse/IGNITE-19345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17723147#comment-17723147
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Yury Gerzhedovich commented on IGNITE-19345:
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[~xtern] LGTM
> SQL: incorrect NULLIF behavior in some cases
> --------------------------------------------
>
> Key: IGNITE-19345
> URL: https://issues.apache.org/jira/browse/IGNITE-19345
> Project: Ignite
> Issue Type: Bug
> Components: sql
> Affects Versions: 3.0.0-beta1
> Reporter: Andrey Khitrin
> Assignee: Pavel Pereslegin
> Priority: Major
> Labels: calcite, ignite-3
>
> During the validation of IGNITE-18167, the following error was found:
> {code:sql}
> sql-cli> SELECT NULLIF(1, 1) IS NULL;
> SQL query execution error
> Exception while executing query [query=SELECT NULLIF(1, 1) IS NULL;]. Error
> message:From line 1, column 8 to line 1, column 19: Illegal mixing of types
> in CASE or COALESCE statement
> {code}
> For chars, it works correctly:
> {code:sql}
> sql-cli> SELECT NULLIF('1', '1') IS NULL;
> ╔═════════╗
> ║ EXPR$0 ║
> ╠═════════╣
> ║ true ║
> ╚═════════╝
> {code}
> For slightly more complex numeric query, it also works correctly:
> {code:sql}
> sql-cli> SELECT x IS NULL FROM (SELECT NULLIF(1, 1) AS x);
> ╔═════════╗
> ║ EXPR$0 ║
> ╠═════════╣
> ║ true ║
> ╚═════════╝
> {code}
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