Jason Altekruse created DRILL-1264:
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Summary: Fix operators to work with embedded types
Key: DRILL-1264
URL: https://issues.apache.org/jira/browse/DRILL-1264
Project: Apache Drill
Issue Type: Sub-task
Reporter: Jason Altekruse
Currently there are several operators such as sort, group by and join that
assume a constant schema. One example of a bug introduced by this assumption is
the current functionality of breaking a group by grouping any time we hit a
schema change in the batch, even if it is not in the column being grouped by.
This is a limitation of the constant schema in a batch, even if we have all
integers in one column we are grouping by, we cannot hold all of the records
matching a group by constraint in a single batch if the type changes in another
column. This currently forces a breaking up of the records that should not
happen. There are also cases where the column we are interested in for the
group by, sort, etc. should be able to incorporate schema changes into the
algorithm, such as correctly sorting different numeric types together or doing
a similar aggregation with compatible types, such as the different numeric
types.
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