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Posted to issues@calcite.apache.org by "Chunwei Lei (JIRA)" <ji...@apache.org> on 2019/04/13 14:00:00 UTC
[jira] [Comment Edited] (CALCITE-2994) Least restrictive type among
structs does not consider nullability
[ https://issues.apache.org/jira/browse/CALCITE-2994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816949#comment-16816949 ]
Chunwei Lei edited comment on CALCITE-2994 at 4/13/19 1:59 PM:
---------------------------------------------------------------
I believe what [~zabetak] means is that {{RelDataTypeFactory#leastRestrictive}} returns the type of loc1 rather than the type of loc2 in his case which is not expected. The reason is {{RelDataTypeFactory#leastRestrictive}} does not take into account nullability when the type is structured type (or row type).
[~zabetak], If I am right, can I task this issue?
was (Author: chunwei lei):
I believe what [~zabetak] means is that {{RelDataTypeFactory#leastRestrictive}} returns the type of loc1 rather than the type of loc2 in his case which is not expected. The reason is {{RelDataTypeFactory#leastRestrictive}} does not take into account nullability when the type is structured type (or row type).
> Least restrictive type among structs does not consider nullability
> -------------------------------------------------------------------
>
> Key: CALCITE-2994
> URL: https://issues.apache.org/jira/browse/CALCITE-2994
> Project: Calcite
> Issue Type: Bug
> Reporter: Stamatis Zampetakis
> Assignee: Stamatis Zampetakis
> Priority: Major
> Fix For: 1.20.0
>
>
> Consider the following high-level example:
> {code:sql}
> CREATE TYPE Coordinates AS (
> x INT,
> y INT);
> CREATE TABLE Address (
> loc1 Coordinates NOT NULL,
> loc2 Coordinates)
> {code}
> The least restrictive type between loc1 and loc2 is the type of loc2 (i.e., a nullable Coordinates type).
> The existing code (i.e., RelDataTypeFactory#leastRestrictive) does take into account nullability when the type is structured type (or row type).
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