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https://issues.apache.org/jira/browse/VXQUERY-148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14591047#comment-14591047
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Preston Carman commented on VXQUERY-148:
----------------------------------------
The queries have the following scenario:
SELECT (***select expression***)
SUBPLAN {
AGGREGATE [$$] <- [function-call:
vxquery:{urn:org.apache.vxquery.operators-ext}sequence, Args:[
vxquery:{urn:org.apache.vxquery.operators-ext}attribute
<attribute(NameTest({}income, {http://www.w3.org/2001/XMLSchema}anyAtomicType)
>, Args:[ ***expression*** ]
]]
UNNEST ( ***iterate expression*** )
NESTED-TUPLE-SOURCE
}
ASSIGN (***child expression***)
The SUBPLAN is nested inside another SUBPLAN since the SUBPLAN AGGREGATE is
missing a UNNEST operator to allow the unnest rule to remove the subplan. Ideas?
> [ERROR] Nested Pipelines
> ------------------------
>
> Key: VXQUERY-148
> URL: https://issues.apache.org/jira/browse/VXQUERY-148
> Project: VXQuery
> Issue Type: Bug
> Reporter: Shivani Mall
> Labels: gsoc2015, xmark
> Attachments: nested_pipelines_q8_q9_q11_q12.txt
>
>
> Following is the error:
> Caused by:
> edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException:
> Attempting to construct a nested plan with 4 operator descriptors. Currently,
> nested plans can only consist in linear pipelines of Asterix micro operators.
> This error makes XMark queries 8, 9, 11 and 12 fail.
> Following text file displays the errors and oet.
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