Victoria Markman created DRILL-2443:
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Summary: Document implicit casting rules
Key: DRILL-2443
URL: https://issues.apache.org/jira/browse/DRILL-2443
Project: Apache Drill
Issue Type: Improvement
Components: Documentation
Reporter: Victoria Markman
Assignee: Bridget Bevens
This document should describe the implicit casting rules in different
operations: joins, "union all" and functions.
For example,
if t1.a1 is defined as an INTEGER and t2.a2 is defined as BIGINT, using these
two columns in a join predicate will result in t1.a1 to be converted to BIGINT
implicitly and explicit cast will not be needed:
select * from t1, t2 where t1.a1 = t2.a2;
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