From 776a2c0e91dfea170ea1c489118e1d42c4121f35 Mon Sep 17 00:00:00 2001
From: Xiao Li <gatorsmile@gmail.com>
Date: Mon, 24 Apr 2017 17:21:42 +0800
Subject: [PATCH] [SPARK-20439][SQL] Fix Catalog API listTables and getTable
when failed to fetch table metadata
### What changes were proposed in this pull request?
`spark.catalog.listTables` and `spark.catalog.getTable` does not work if we are unable to retrieve table metadata due to any reason (e.g., table serde class is not accessible or the table type is not accepted by Spark SQL). After this PR, the APIs still return the corresponding Table without the description and tableType)
### How was this patch tested?
Added a test case
Author: Xiao Li <gatorsmile@gmail.com>
Closes #17730 from gatorsmile/listTables.
---
.../spark/sql/internal/CatalogImpl.scala | 28 +++++++++++++++----
.../sql/hive/execution/HiveDDLSuite.scala | 8 ++++++
2 files changed, 31 insertions(+), 5 deletions(-)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala b/sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala
index aebb663df5..0b8e53868c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala
@@ -18,6 +18,7 @@
package org.apache.spark.sql.internal
import scala.reflect.runtime.universe.TypeTag
+import scala.util.control.NonFatal
import org.apache.spark.annotation.Experimental
import org.apache.spark.sql._
@@ -98,14 +99,27 @@ class CatalogImpl(sparkSession: SparkSession) extends Catalog {
CatalogImpl.makeDataset(tables, sparkSession)
}
+ /**
+ * Returns a Table for the given table/view or temporary view.
+ *
+ * Note that this function requires the table already exists in the Catalog.
+ *
+ * If the table metadata retrieval failed due to any reason (e.g., table serde class
+ * is not accessible or the table type is not accepted by Spark SQL), this function
+ * still returns the corresponding Table without the description and tableType)
+ */
private def makeTable(tableIdent: TableIdentifier): Table = {
- val metadata = sessionCatalog.getTempViewOrPermanentTableMetadata(tableIdent)
+ val metadata = try {
+ Some(sessionCatalog.getTempViewOrPermanentTableMetadata(tableIdent))
+ } catch {
+ case NonFatal(_) => None
+ }
val isTemp = sessionCatalog.isTemporaryTable(tableIdent)
new Table(
name = tableIdent.table,
- database = metadata.identifier.database.orNull,
- description = metadata.comment.orNull,
- tableType = if (isTemp) "TEMPORARY" else metadata.tableType.name,
+ database = metadata.map(_.identifier.database).getOrElse(tableIdent.database).orNull,
+ description = metadata.map(_.comment.orNull).orNull,
+ tableType = if (isTemp) "TEMPORARY" else metadata.map(_.tableType.name).orNull,
isTemporary = isTemp)
}
@@ -197,7 +211,11 @@ class CatalogImpl(sparkSession: SparkSession) extends Catalog {
* `AnalysisException` when no `Table` can be found.
*/
override def getTable(dbName: String, tableName: String): Table = {
- makeTable(TableIdentifier(tableName, Option(dbName)))
+ if (tableExists(dbName, tableName)) {
+ makeTable(TableIdentifier(tableName, Option(dbName)))
+ } else {
+ throw new AnalysisException(s"Table or view '$tableName' not found in database '$dbName'")
+ }
}
/**
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
index 3906968aaf..16a99321ba 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveDDLSuite.scala
@@ -1197,6 +1197,14 @@ class HiveDDLSuite
s"CREATE INDEX $indexName ON TABLE $tabName (a) AS 'COMPACT' WITH DEFERRED REBUILD")
val indexTabName =
spark.sessionState.catalog.listTables("default", s"*$indexName*").head.table
+
+ // Even if index tables exist, listTables and getTable APIs should still work
+ checkAnswer(
+ spark.catalog.listTables().toDF(),
+ Row(indexTabName, "default", null, null, false) ::
+ Row(tabName, "default", null, "MANAGED", false) :: Nil)
+ assert(spark.catalog.getTable("default", indexTabName).name === indexTabName)
+
intercept[TableAlreadyExistsException] {
sql(s"CREATE TABLE $indexTabName(b int)")
}
--
GitLab