[jira] [Created] (DRILL-1459) Invalid field materialization causes vectors being created multiple times and crashes jvm in case a nested field is accessed

["Hanifi Gunes (JIRA)" <ji...@apache.org>]

Hanifi Gunes created DRILL-1459:
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             Summary: Invalid field materialization causes vectors being created multiple times and crashes jvm in case a nested field is accessed
                 Key: DRILL-1459
                 URL: https://issues.apache.org/jira/browse/DRILL-1459
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Hanifi Gunes
            Assignee: Hanifi Gunes


Currently RecordBatchLoader#load relies on MaterializedField#create to materialize a SerializedField. However, MaterializedField#create method disregards child fields of SerializedField so the resultant materialized field has only the root field. Instead, child fields are added during vectorization.

Next time, we hit to RecordBatchLoader#load method, materialized field check fails because the previous materialized field now has children but newly materialized field does not. This misleads RecordBatchLoader#load to think that schema has changed and to create a new vector even though schema is the same.

Additionally, running a nested query on the previously created vector instance crashes the jvm. 



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