beliefer commented on a change in pull request #35130:
URL: https://github.com/apache/spark/pull/35130#discussion_r780603780
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File path: sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
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@@ -223,7 +225,11 @@ abstract class JdbcDialect extends Serializable with
Logging{
case f: GeneralAggregateFunc if f.name() == "AVG" =>
assert(f.inputs().length == 1)
val distinct = if (f.isDistinct) "DISTINCT " else ""
- Some(s"AVG($distinct${f.inputs().head})")
+ if (supportCompletePushDown) {
+ Some(s"AVG($distinct${f.inputs().head})")
+ } else {
+ Some(s"Sum($distinct${f.inputs().head}),
Count($distinct${f.inputs().head})")
Review comment:
If Spark cannot complete pushdown AVG to database, we still want partial
pushdown.
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