Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17713#discussion_r115114174
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -1427,15 +1225,8 @@ class Analyzer(
// Step 2: If the subquery plan is fully resolved, pull the outer
references and record
// them as children of SubqueryExpression.
if (current.resolved) {
- // Make sure the resolved query has the required number of output
columns. This is only
- // needed for Scalar and IN subqueries.
- if (requiredColumns > 0 && requiredColumns != current.output.size)
{
- failAnalysis(s"The number of columns in the subquery
(${current.output.size}) " +
- s"does not match the required number of columns
($requiredColumns)")
--- End diff --
In the new changes, it sounds like only `In` subquery detects this issue.
How about the other subquery expression types? A bug?
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