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Posted to issues@calcite.apache.org by "Vladimir Sitnikov (JIRA)" <ji...@apache.org> on 2014/12/13 12:41:13 UTC

[jira] [Created] (CALCITE-529) Allow to pass java object via rexBuilder.makeLiteral()

Vladimir Sitnikov created CALCITE-529:
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             Summary: Allow to pass java object via rexBuilder.makeLiteral()
                 Key: CALCITE-529
                 URL: https://issues.apache.org/jira/browse/CALCITE-529
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.0.0-incubating
            Reporter: Vladimir Sitnikov
            Assignee: Julian Hyde


Motivation: Rex is simpler that linq4j. For instance, sometimes it is easier to create a {{ProjectRel}} rather than lower the expression to low-level linq4j.

For example: https://github.com/vlsi/mat-calcite-plugin/blob/master/MatCalcitePlugin/src/com/github/vlsi/mat/optiq/rules/InstanceAccessByClassIdRule.java#L43

The problem is to pass non-literal java object to enumerable/interpreter conventions.

For enumerable the implementation can use stash. For interpreter it can use the value as is, etc.



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