Paul Rogers created DRILL-7574:
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Summary: Generalize projection parser
Key: DRILL-7574
URL: https://issues.apache.org/jira/browse/DRILL-7574
Project: Apache Drill
Issue Type: Improvement
Affects Versions: 1.17.0
Reporter: Paul Rogers
Assignee: Paul Rogers
Fix For: 1.18.0
EVF contains a bit of code called the"projection parser": it takes a projection
list and converts it into a form useful for scan projection. The prior version
handled single-level arrays, such as needed for the {{`columns`}} column in the
text reader. For JSON, we must handle arbitrary column structures such as:
{noformat}
a, a.b, a[1], a[1][2], a.[1][2].b
{noformat}
Adding the DICT type means that we must be a bit more general in the parser.
This ticket fixes these issues.
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