gengliangwang commented on a change in pull request #34747:
URL: https://github.com/apache/spark/pull/34747#discussion_r758938379
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
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@@ -198,21 +205,39 @@ class Analyzer(override val catalogManager:
CatalogManager)
}
def executeAndCheck(plan: LogicalPlan, tracker: QueryPlanningTracker):
LogicalPlan = {
- if (plan.analyzed) return plan
AnalysisHelper.markInAnalyzer {
val analyzed = executeAndTrack(plan, tracker)
try {
checkAnalysis(analyzed)
analyzed
} catch {
case e: AnalysisException =>
- val ae = e.copy(plan = Option(analyzed))
+ val ae = e.copy(plan = Option(analyzed),
+ message = e.message + extraHintForAnsiTypeCoercion(plan))
ae.setStackTrace(e.getStackTrace)
throw ae
}
}
}
+ private def extraHintForAnsiTypeCoercion(plan: LogicalPlan): String = {
+ if (!conf.ansiEnabled) {
+ ""
+ } else {
+ val nonAnsiPlan = AnalysisContext.withDefaultTypeCoercionAnalysisContext
{
+ executeSameContext(plan)
+ }
+ try {
+ checkAnalysis(nonAnsiPlan)
+ "\nTo fix the error, you might need to add explicit type casts.\n" +
Review comment:
Take `ResolveAliases` as an example, the order of it is in front of Type
Coercion rules, but it won't happen in the first run since the children is not
resolved. After apply the Type Coercion rules, we still have to run the other
rules again:
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