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https://issues.apache.org/jira/browse/CALCITE-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16576893#comment-16576893
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Vladimir Sitnikov commented on CALCITE-2462:
--------------------------------------------
Alternative option would be to use interface like the following
{code:java}
public interface RexProgramBuilderBase {
RexBuilder getRexBuilder();
default RexNode add(RexNode n1, RexNode n2) {
return getRexBuilder().makeCall(SqlStdOperatorTable.PLUS, n1, n2);
}
...
}
{code}
It would release the need to extend this "class", however it is not clear where
local fields should be stored (e.g. private {{Map<RelDataType, RexDynamicParam>
dynamicParams;}} and so on)
So I think {{abstract base class}} should be just fine for now.
> RexProgramTest: move "rex building" methods to base class
> ---------------------------------------------------------
>
> Key: CALCITE-2462
> URL: https://issues.apache.org/jira/browse/CALCITE-2462
> Project: Calcite
> Issue Type: Sub-task
> Components: core
> Affects Versions: 1.17.0
> Reporter: Vladimir Sitnikov
> Assignee: Julian Hyde
> Priority: Major
>
> RexProgramTest is quite big (2000 lines now), and "easy to use" rex building
> is useful for many tests.
> So I suggest to move methods like {{gt}}, {{lt}}, etc to the base class, so
> multiple other tests can reuse it.
> Alternative option would be to use Kotlin for builders, yet I think Java
> tests will be there for quite a while, so it would be nice to simplify them
> as well.
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