Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/13156#discussion_r63757822
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala ---
@@ -126,24 +126,9 @@ case class RefreshTable(tableIdent: TableIdentifier)
extends RunnableCommand {
override def run(sparkSession: SparkSession): Seq[Row] = {
- // Refresh the given table's metadata first.
- sparkSession.sessionState.catalog.refreshTable(tableIdent)
-
- // If this table is cached as a InMemoryColumnarRelation, drop the
original
- // cached version and make the new version cached lazily.
- val logicalPlan =
sparkSession.sessionState.catalog.lookupRelation(tableIdent)
- // Use lookupCachedData directly since RefreshTable also takes
databaseName.
- val isCached =
sparkSession.cacheManager.lookupCachedData(logicalPlan).nonEmpty
- if (isCached) {
- // Create a data frame to represent the table.
- // TODO: Use uncacheTable once it supports database name.
- val df = Dataset.ofRows(sparkSession, logicalPlan)
- // Uncache the logicalPlan.
- sparkSession.cacheManager.tryUncacheQuery(df, blocking = true)
- // Cache it again.
- sparkSession.cacheManager.cacheQuery(df, Some(tableIdent.table))
- }
--- End diff --
The above logics are moved to `sparkSession.catalog.refreshTable`
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