[cassandra cassandra2 dynamodb hbase098 hbase10 jdbc s3] Fixing squid:S1481 - Unused local variables should be removed

cassandra/src/main/java/com/yahoo/ycsb/db/CassandraCQLClient.java

@@ -388,7 +388,7 @@ public class CassandraCQLClient extends DB {
         System.out.println(insertStmt.toString());
       }
 
-      ResultSet rs = session.execute(insertStmt);
+      session.execute(insertStmt);
 
       return Status.OK;
     } catch (Exception e) {

cassandra2/src/main/java/com/yahoo/ycsb/db/CassandraCQLClient.java

@@ -433,7 +433,7 @@ public class CassandraCQLClient extends DB {
         System.out.println(insertStmt.toString());
       }
 
-      ResultSet rs = session.execute(insertStmt);
+      session.execute(insertStmt);
 
       return Status.OK;
     } catch (Exception e) {
@@ -466,7 +466,7 @@ public class CassandraCQLClient extends DB {
         System.out.println(stmt.toString());
       }
 
-      ResultSet rs = session.execute(stmt);
+      session.execute(stmt);
 
       return Status.OK;
     } catch (Exception e) {

dynamodb/src/main/java/com/yahoo/ycsb/db/DynamoDBClient.java

@@ -293,9 +293,8 @@ public class DynamoDBClient extends DB {
         }
 
         PutItemRequest putItemRequest = new PutItemRequest(table, attributes);
-        PutItemResult res = null;
         try {
-            res = dynamoDB.putItem(putItemRequest);
+            dynamoDB.putItem(putItemRequest);
         }catch (AmazonServiceException ex) {
             logger.error(ex.getMessage());
             return Status.ERROR;
@@ -310,10 +309,9 @@ public class DynamoDBClient extends DB {
     public Status delete(String table, String key) {
         logger.debug("deletekey: " + key + " from table: " + table);
         DeleteItemRequest req = new DeleteItemRequest(table, createPrimaryKey(key));
-        DeleteItemResult res = null;
 
         try {
-            res = dynamoDB.deleteItem(req);
+            dynamoDB.deleteItem(req);
         }catch (AmazonServiceException ex) {
             logger.error(ex.getMessage());
             return Status.ERROR;

hbase098/src/main/java/com/yahoo/ycsb/db/HBaseClient.java

@@ -110,7 +110,7 @@ public class HBaseClient extends com.yahoo.ycsb.DB
       try
 	  {
 	      HTable ht = new HTable(config, table);
-	      HTableDescriptor dsc = ht.getTableDescriptor();
+	      ht.getTableDescriptor();
 	  }
       catch (IOException e)
 	  {

hbase10/src/main/java/com/yahoo/ycsb/db/HBaseClient10.java

@@ -28,7 +28,6 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.Cell;
 import org.apache.hadoop.hbase.CellUtil;
 import org.apache.hadoop.hbase.HBaseConfiguration;
-import org.apache.hadoop.hbase.HTableDescriptor;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.client.BufferedMutator;
 import org.apache.hadoop.hbase.client.BufferedMutatorParams;
@@ -142,8 +141,7 @@ public class HBaseClient10 extends com.yahoo.ycsb.DB {
     String table = com.yahoo.ycsb.workloads.CoreWorkload.table;
     try {
       final TableName tName = TableName.valueOf(table);
-      HTableDescriptor dsc =
-          connection.getTable(tName).getTableDescriptor();
+      connection.getTable(tName).getTableDescriptor();
     } catch (IOException e) {
       throw new DBException(e);
     }

jdbc/src/test/java/com/yahoo/ycsb/db/JdbcDBClientTest.java

@@ -153,7 +153,7 @@ public class JdbcDBClientTest {
     public void insertTest() {
         try {
             String insertKey = "user0";
-            HashMap<String, ByteIterator> insertMap = insertRow(insertKey);
+            insertRow(insertKey);
 
             ResultSet resultSet = jdbcConnection.prepareStatement(
                 String.format("SELECT * FROM %s", TABLE_NAME)
@@ -245,7 +245,7 @@ public class JdbcDBClientTest {
     @Test
     public void readTest() {
         String insertKey = "user0";
-        HashMap<String, ByteIterator> insertMap = insertRow(insertKey);
+        insertRow(insertKey);
         HashSet<String> readFields = new HashSet<String>();
         HashMap<String, ByteIterator> readResultMap = new HashMap<String, ByteIterator>();
 

s3/src/main/java/com/yahoo/ycsb/db/S3Client.java

@@ -361,8 +361,7 @@ public class S3Client extends DB {
           getObjectMetadataRequest = new GetObjectMetadataRequest(bucket,
               key);
         }
-        S3Object object =
-            s3Client.getObject(getObjectRequest);
+        s3Client.getObject(getObjectRequest);
         ObjectMetadata objectMetadata =
             s3Client.getObjectMetadata(getObjectMetadataRequest);
         int sizeOfFile = (int)objectMetadata.getContentLength();