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https://issues.apache.org/jira/browse/DRILL-3443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Altekruse updated DRILL-3443:
-----------------------------------
Priority: Major (was: Critical)
> Flatten function raise exception when JSON files have different schema
> ----------------------------------------------------------------------
>
> Key: DRILL-3443
> URL: https://issues.apache.org/jira/browse/DRILL-3443
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Relational Operators
> Affects Versions: 1.0.0
> Environment: DRILL 1.0 Embedded (running on OSX with Java 8)
> DRILL 1.0 Deployed on MapR 4.1 Sandbox
> Reporter: Tugdual Grall
> Assignee: Jason Altekruse
> Fix For: 1.3.0
>
>
> I have 2 JSON documents:
> {code}
> {
> "name" : "PPRODUCT_002",
> "price" : 200.00,
> "tags" : ["sports" , "cool", "ocean"]
> }
> {
> "name" : "PPRODUCT_001",
> "price" : 100.00
> }
> {code}
> And I execute this query:
> {code}
> SELECT name, flatten(tags)
> FROM dfs.`data/json_array/*.json`
> {code}
> If the JSON Documents are located in 2 different files and the first file
> does not contains the "tags" (product 001 in 001.json ), the following
> exception is raised:
> {code}
> org.apache.drill.common.exceptions.UserRemoteException: SYSTEM ERROR:
> java.lang.ClassCastException: Cannot cast
> org.apache.drill.exec.vector.NullableIntVector to
> org.apache.drill.exec.vector.RepeatedValueVector Fragment 0:0 [Error Id:
> 4bb5b9e4-0de1-48e9-a0f3-956339608903 on 192.168.99.13:31010]
> {code}
> It is working if:
> * All the JSON documents are in a single json file (order is not important)
> * if the product with the tags attribute is "first" on the file system, for
> example you put product 02 in 000.json (that will be read before 001.json)
> This is similar to [DRILL-3334] bug
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