[SPARK-2264][SQL] Fix failing CachedTableSuite

Author: Michael Armbrust <michael@databricks.com>

Closes #1201 from marmbrus/fixCacheTests and squashes the following commits:

9d87ed1 [Michael Armbrust] Use analyzer (which runs to fixed point) instead of manually removing analysis operators.

sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala

@@ -186,8 +186,8 @@ class SQLContext(@transient val sparkContext: SparkContext)
 
   /** Caches the specified table in-memory. */
   def cacheTable(tableName: String): Unit = {
-    val currentTable = catalog.lookupRelation(None, tableName)
-    val asInMemoryRelation = EliminateAnalysisOperators(currentTable.logicalPlan) match {
+    val currentTable = table(tableName).queryExecution.analyzed
+    val asInMemoryRelation = currentTable match {
       case _: InMemoryRelation =>
         currentTable.logicalPlan
 
@@ -202,7 +202,7 @@ class SQLContext(@transient val sparkContext: SparkContext)
 
   /** Removes the specified table from the in-memory cache. */
   def uncacheTable(tableName: String): Unit = {
-    EliminateAnalysisOperators(catalog.lookupRelation(None, tableName)) match {
+    table(tableName).queryExecution.analyzed match {
       // This is kind of a hack to make sure that if this was just an RDD registered as a table,
       // we reregister the RDD as a table.
       case inMem @ InMemoryRelation(_, _, e: ExistingRdd) =>
@@ -218,8 +218,8 @@ class SQLContext(@transient val sparkContext: SparkContext)
 
   /** Returns true if the table is currently cached in-memory. */
   def isCached(tableName: String): Boolean = {
-    val relation = catalog.lookupRelation(None, tableName)
-    EliminateAnalysisOperators(relation) match {
+    val relation = table(tableName).queryExecution.analyzed
+    relation match {
       case _: InMemoryRelation => true
       case _ => false
     }

sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala

@@ -20,13 +20,31 @@ package org.apache.spark.sql
 import org.apache.spark.sql.TestData._
 import org.apache.spark.sql.columnar.{InMemoryRelation, InMemoryColumnarTableScan}
 import org.apache.spark.sql.test.TestSQLContext
+import org.apache.spark.sql.test.TestSQLContext._
 
 class CachedTableSuite extends QueryTest {
   TestData // Load test tables.
 
-  // NOTE: ALL TESTS ARE IGNORED PENDING SPARK-2264
+  test("SPARK-1669: cacheTable should be idempotent") {
+    assume(!table("testData").logicalPlan.isInstanceOf[InMemoryRelation])
 
-  ignore("read from cached table and uncache") {
+    cacheTable("testData")
+    table("testData").queryExecution.analyzed match {
+      case _: InMemoryRelation =>
+      case _ =>
+        fail("testData should be cached")
+    }
+
+    cacheTable("testData")
+    table("testData").queryExecution.analyzed match {
+      case InMemoryRelation(_, _, _: InMemoryColumnarTableScan) =>
+        fail("cacheTable is not idempotent")
+
+      case _ =>
+    }
+  }
+
+  test("read from cached table and uncache") {
     TestSQLContext.cacheTable("testData")
 
     checkAnswer(
@@ -53,20 +71,20 @@ class CachedTableSuite extends QueryTest {
     }
   }
 
-  ignore("correct error on uncache of non-cached table") {
+  test("correct error on uncache of non-cached table") {
     intercept[IllegalArgumentException] {
       TestSQLContext.uncacheTable("testData")
     }
   }
 
-  ignore("SELECT Star Cached Table") {
+  test("SELECT Star Cached Table") {
     TestSQLContext.sql("SELECT * FROM testData").registerAsTable("selectStar")
     TestSQLContext.cacheTable("selectStar")
     TestSQLContext.sql("SELECT * FROM selectStar WHERE key = 1").collect()
     TestSQLContext.uncacheTable("selectStar")
   }
 
-  ignore("Self-join cached") {
+  test("Self-join cached") {
     val unCachedAnswer =
       TestSQLContext.sql("SELECT * FROM testData a JOIN testData b ON a.key = b.key").collect()
     TestSQLContext.cacheTable("testData")
@@ -76,7 +94,7 @@ class CachedTableSuite extends QueryTest {
     TestSQLContext.uncacheTable("testData")
   }
 
-  ignore("'CACHE TABLE' and 'UNCACHE TABLE' SQL statement") {
+  test("'CACHE TABLE' and 'UNCACHE TABLE' SQL statement") {
     TestSQLContext.sql("CACHE TABLE testData")
     TestSQLContext.table("testData").queryExecution.executedPlan match {
       case _: InMemoryColumnarTableScan => // Found evidence of caching

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -406,23 +406,4 @@ class SQLQuerySuite extends QueryTest {
     )
     clear()
   }
-
-  test("SPARK-1669: cacheTable should be idempotent") {
-    assume(!table("testData").logicalPlan.isInstanceOf[InMemoryRelation])
-
-    cacheTable("testData")
-    EliminateAnalysisOperators(table("testData").logicalPlan) match {
-      case _: InMemoryRelation =>
-      case _ =>
-        fail("testData should be cached")
-    }
-
-    cacheTable("testData")
-    EliminateAnalysisOperators(table("testData").logicalPlan) match {
-      case InMemoryRelation(_, _, _: InMemoryColumnarTableScan) =>
-        fail("cacheTable is not idempotent")
-
-      case _ =>
-    }
-  }
 }