rdblue commented on a change in pull request #24763: [SPARK-27909][SQL] Do not
run analysis inside CTE substitution
URL: https://github.com/apache/spark/pull/24763#discussion_r290462719
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
##########
@@ -215,23 +215,26 @@ class Analyzer(
object CTESubstitution extends Rule[LogicalPlan] {
def apply(plan: LogicalPlan): LogicalPlan = plan.resolveOperatorsUp {
case With(child, relations) =>
- substituteCTE(child, relations.foldLeft(Seq.empty[(String,
LogicalPlan)]) {
- case (resolved, (name, relation)) =>
- resolved :+ name -> executeSameContext(substituteCTE(relation,
resolved))
- })
+ // substitute CTE expressions right-to-left to resolve references to
previous CTEs:
+ // with a as (select * from t) with b as (select * from a) select *
from b
Review comment:
Done.
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