Andries Engelbrecht created DRILL-1553:
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Summary: Assign NULL value for empty fields in CSV data sources
Key: DRILL-1553
URL: https://issues.apache.org/jira/browse/DRILL-1553
Project: Apache Drill
Issue Type: Improvement
Components: Execution - Data Types
Reporter: Andries Engelbrecht
Ability for Drill to assign a NULL value to empty fields in CSV files.
Option to set at session or system level to implement this assignment.
Avoids errors when casting to different data types without the need to check
for empty fields first. Simplifies predicate filters and avoid potential
mistakes. Allows for simplification of joins, especially with columns from
different data sources.
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