Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/22075#discussion_r209488846 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala --- @@ -90,6 +90,20 @@ trait CheckAnalysis extends PredicateHelper { u.failAnalysis(s"Table or view not found: ${u.tableIdentifier}") case operator: LogicalPlan => + // Check argument data types of higher-order functions downwards first. + // If the arguments of the higher-order functions are resolved but the type check fails, + // the argument functions will not get resolved, but we should report the argument type --- End diff -- I'm worried that if we say only `functions`, we might be confused whether the "function" means the higher-order function or the function as an argument. WDYT?
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