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https://issues.apache.org/jira/browse/DRILL-3232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14982089#comment-14982089
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ASF GitHub Bot commented on DRILL-3232:
---------------------------------------
Github user StevenMPhillips commented on a diff in the pull request:
https://github.com/apache/drill/pull/207#discussion_r43479145
--- Diff: exec/java-exec/src/main/codegen/templates/NullReader.java ---
@@ -56,11 +56,17 @@ public void copyAsValue(MapWriter writer) {}
public void copyAsValue(ListWriter writer) {}
- <#list vv.types as type><#list type.minor as minor><#assign name =
minor.class?cap_first />
+ public void copyAsValue(UnionWriter writer) {}
+
+ <#list vv.types as type><#list type.minor as minor><#assign name =
minor.class?cap_first />
+ public void read(${name}Holder holder){
+ throw new UnsupportedOperationException("NullReader cannot read into
non-nullable holder");
--- End diff --
This is an internal error message, not the result of a potential user error.
> Modify existing vectors to allow type promotion
> -----------------------------------------------
>
> Key: DRILL-3232
> URL: https://issues.apache.org/jira/browse/DRILL-3232
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Execution - Codegen, Execution - Data Types, Execution -
> Relational Operators, Functions - Drill
> Reporter: Steven Phillips
> Assignee: Hanifi Gunes
> Fix For: 1.3.0
>
>
> Support the ability for existing vectors to be promoted similar to supported
> implicit casting rules.
> For example:
> INT > DOUBLE > STRING > EMBEDDED
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