amaliujia commented on code in PR #36586:
URL: https://github.com/apache/spark/pull/36586#discussion_r875476033
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sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala:
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@@ -97,8 +97,15 @@ class CatalogImpl(sparkSession: SparkSession) extends
Catalog {
*/
@throws[AnalysisException]("database does not exist")
override def listTables(dbName: String): Dataset[Table] = {
- val tables = sessionCatalog.listTables(dbName).map(makeTable)
- CatalogImpl.makeDataset(tables, sparkSession)
+ if (sessionCatalog.databaseExists(dbName)) {
+ val tables = sessionCatalog.listTables(dbName).map(makeTable)
+ CatalogImpl.makeDataset(tables, sparkSession)
+ } else {
+ val multiParts =
sparkSession.sessionState.sqlParser.parseMultipartIdentifier(dbName)
+ val plan = ShowTables(UnresolvedNamespace(multiParts), None)
+ val ret = sparkSession.sessionState.executePlan(plan).toRdd.collect()
+ CatalogImpl.makeDataset(Seq(), sparkSession)
Review Comment:
Are you saying we don't construct a logical plan for `listTables`?
If so, now I am confused on when we should construct a logical plan (thus to
match SQL command) and when we don't....
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