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https://issues.apache.org/jira/browse/DRILL-4858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431350#comment-15431350
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jean-claude commented on DRILL-4858:
------------------------------------
Pull request has been created. Please review.
https://github.com/apache/drill/pull/573
Note: I'm not sure of the implications or side effects of changing the
EvaluationVisitor or the TypeHelper but it does fix the issue reported above.
> REPEATED_COUNT on JSON containing an array of maps
> --------------------------------------------------
>
> Key: DRILL-4858
> URL: https://issues.apache.org/jira/browse/DRILL-4858
> Project: Apache Drill
> Issue Type: Bug
> Reporter: jean-claude
> Priority: Minor
>
> REPEATED_COUNT of JSON containing an array of map does not work.
> JSON file
> {code}
> drill$ cat /Users/jccote/repeated_count.json
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {"intArray": [1,2,3,4], "mapArray": [{"name": "foo"},{"name": "foo"}],
> "label": "foo"}
> {code}
> select
> {code}
> 0: jdbc:drill:zk=local> select repeated_count(mapArray) from
> dfs.`/Users/jccote/repeated_count.json`;
> {code}
> error
> {code}
> Error: SYSTEM ERROR: SchemaChangeException: Failure while trying to
> materialize incoming schema. Errors:
>
> Error in expression at index -1. Error: Missing function implementation:
> [repeated_count(MAP-REPEATED)]. Full expression: --UNKNOWN EXPRESSION--..
> Fragment 0:0
> [Error Id: 1057bb8e-1cc4-4a9a-a748-3a6a14092858 on 192.168.1.3:31010]
> (state=,code=0)
> {code}
> Looking at the org.apache.drill.exec.expr.fn.impl.SimpleRepeatedFunctions
> Looks like it's not enabled yet.
> {code}
> // TODO - need to confirm that these work SMP: They do not
> @FunctionTemplate(name = "repeated_count", scope =
> FunctionTemplate.FunctionScope.SIMPLE)
> public static class RepeatedLengthMap implements DrillSimpleFunc {
> {code}
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