[
https://issues.apache.org/jira/browse/CALCITE-6938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mihai Budiu resolved CALCITE-6938.
----------------------------------
Fix Version/s: 1.40.0
Resolution: Fixed
Fixed in
https://github.com/apache/calcite/commit/7a0564a7d0b2629d4537fcfd6879528bde378d9f
Thank you for your contribution [~jensen]
> Support zero value creation of nested data types
> ------------------------------------------------
>
> Key: CALCITE-6938
> URL: https://issues.apache.org/jira/browse/CALCITE-6938
> Project: Calcite
> Issue Type: Improvement
> Reporter: Zhen Chen
> Assignee: Zhen Chen
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.40.0
>
>
> This implementation ensures zero values of various nested data types can be
> used in {{COALESCE(nestedCol, nestedZero)}} expressions.
> Basic Nested Types:
> # ARRAY: Zero value represented as an zero array. e.g. ARRAY<INTEGER> →
> ARRAY[]
> # MULTISET: Zero value represented as an zero multiset. e.g.
> MULTISET<INTEGER> → MULTISET[]
> # MAP: Zero value represented as an zero map. e.g. MAP<INTEGER, INTEGER> →
> MAP(0, 0)
> # ROW: Zero value with all fields initialized to their respective type's
> zero value. e.g. ROW<INTEGER, INTEGER> → ROW(0, 0)
> Complex Nested Types:
> * {{ARRAY<ARRAY<INTEGER>>}}
> * {{ARRAY<MAP<VARCHAR(50), INTEGER>>}}
> * MAP<STRING, ARRAY<ROW<INT, BOOLEAN>>>
> * ......
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
