findepi commented on code in PR #12142:
URL: https://github.com/apache/datafusion/pull/12142#discussion_r1937064978
##########
datafusion/expr/src/logical_plan/builder.rs:
##########
@@ -1331,7 +1331,17 @@ pub fn validate_unique_names<'a>(
})
}
-/// Union two logical plans.
+/// Union two [`LogicalPlan`]s.
+///
+/// Constructs the UNION plan, but does not perform type-coercion. Therefore
the
+/// subtree expressions will not be properly typed until the optimizer pass.
Review Comment:
-> https://github.com/apache/datafusion/issues/14380
##########
datafusion/expr/src/logical_plan/builder.rs:
##########
@@ -1331,7 +1331,17 @@ pub fn validate_unique_names<'a>(
})
}
-/// Union two logical plans.
+/// Union two [`LogicalPlan`]s.
+///
+/// Constructs the UNION plan, but does not perform type-coercion. Therefore
the
+/// subtree expressions will not be properly typed until the optimizer pass.
Review Comment:
-> https://github.com/apache/datafusion/issues/14380
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