[jira] [Work logged] (BEAM-10595) Remove rules that not work well with Java UDF

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BEAM-10595?focusedWorklogId=466415&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-466415 ]

ASF GitHub Bot logged work on BEAM-10595:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 04/Aug/20 19:40
            Start Date: 04/Aug/20 19:40
    Worklog Time Spent: 10m 
      Work Description: apilloud commented on a change in pull request #12400:
URL: https://github.com/apache/beam/pull/12400#discussion_r465286741



##########
File path: sdks/java/extensions/sql/zetasql/src/main/java/org/apache/beam/sdk/extensions/sql/zetasql/ZetaSQLQueryPlanner.java
##########
@@ -93,6 +95,14 @@ public ZetaSQLQueryPlanner(JdbcConnection jdbcConnection, RuleSet[] ruleSets) {
         //  requires the JoinCommuteRule, which doesn't work without struct flattening.
         if (rule instanceof JoinCommuteRule) {
           continue;
+        } else if (rule instanceof FilterCalcMergeRule || rule instanceof ProjectCalcMergeRule) {
+          // In order to support Java UDF, we need both BeamZetaSqlCalcRel and BeamCalcRel. It is
+          // because BeamZetaSqlCalcRel can execute ZetaSQL built-in functions while BeamCalcRel
+          // can execute UDFs. So during planning, we expect both Filter and Project are converted
+          // to Calc nodes before merging with other Project/Filter/Calc nodes. Thus we should not
+          // add FilterCalcMergeRule and ProjectCalcMergeRule. CalcMergeRule will achieve equivalent
+          // planning result eventually.

Review comment:
       Shouldn't we just disable these rules all together (in `BeamRuleSets.java`) if they are redundant instead of special casing them for ZetaSQL?




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 466415)
    Time Spent: 1.5h  (was: 1h 20m)

> Remove rules that not work well with Java UDF
> ---------------------------------------------
>
>                 Key: BEAM-10595
>                 URL: https://issues.apache.org/jira/browse/BEAM-10595
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-sql-zetasql
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: P2
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> In order to support Java UDF, we need both BeamZetaSqlCalcRel and BeamCalcRel. It is 
> because BeamZetaSqlCalcRel can execute ZetaSQL built-in functions while BeamCalcRel
> can execute UDFs. So during planning, we expect both Filter and Project are converted to
>  a Calc before merging with other Projec/Filter/Calc. Thus we should not add FilterCalcMergeRuleand ProjectCalcMergeRule.



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