You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@beam.apache.org by "Kyle Weaver (Jira)" <ji...@apache.org> on 2021/04/06 22:51:00 UTC

[jira] [Created] (BEAM-12108) Support STRUCT type in BeamJavaUdfCalcRule.

Kyle Weaver created BEAM-12108:
----------------------------------

             Summary: Support STRUCT type in BeamJavaUdfCalcRule.
                 Key: BEAM-12108
                 URL: https://issues.apache.org/jira/browse/BEAM-12108
             Project: Beam
          Issue Type: New Feature
          Components: dsl-sql-zetasql
            Reporter: Kyle Weaver


There are at least a couple reasons why this doesn't work yet:
 # Type inference. Returning a List seems to work okay because we preserve the return element type [1], but taking a List as an input doesn't work because we lose the parameters' element type(s) [2].
 # The current matching logic rejects the Calcite ARRAY operator. We can probably make it less strict. [3]

 [1] [https://github.com/apache/beam/blob/ffb00911b5d5579544fc4c699f186dd3e1cd2b83/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/ScalarFunctionImpl.java#L129]

[2] [https://github.com/apache/beam/blob/0c01636fc8610414859d946cb93eabc904123fc8/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/UdfImplReflectiveFunctionBase.java#L61]

[3] https://github.com/apache/beam/blob/315386cdfec6803b95f0b881d699e674f63d48ad/sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/BeamJavaUdfCalcRule.java#L88-L89



--
This message was sent by Atlassian Jira
(v8.3.4#803005)