SQL++ parser:
1. refactored asterix-aql to become asterix-lang-common and asterix-lang-aql, where the former is the common part for different languages;
2. added asterix-lang-sqlpp on top of asterix-lang-common;
3. ported parser tests, optimizer tests and runtime tests in asterix-app to their sql++ version, and added parser tests for all the queries.

Change-Id: Ie5af4e3b692ca017ec047a1ba3b404a51beb3a2e
Reviewed-on: https://asterix-gerrit.ics.uci.edu/466
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Till Westmann <tillw@apache.org>
diff --git a/asterix-app/src/test/resources/optimizerts/queries_sqlpp/count-tweets.sqlpp b/asterix-app/src/test/resources/optimizerts/queries_sqlpp/count-tweets.sqlpp
new file mode 100644
index 0000000..04a3b15
--- /dev/null
+++ b/asterix-app/src/test/resources/optimizerts/queries_sqlpp/count-tweets.sqlpp
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+drop  database twitter if exists;
+create  database twitter;
+
+use twitter;
+
+
+create type twitter.Tweet as
+{
+  id : int32,
+  tweetid : int64,
+  loc : point,
+  time : datetime,
+  text : string
+}
+
+create external  table TwitterData(Tweet) using "org.apache.asterix.external.dataset.adapter.NCFileSystemAdapter"(("path"="nc1://data/twitter/smalltweets.txt"),("format"="adm"));
+
+write output to nc1:"/tmp/count-tweets.adm"
+select element {'word':tok,'count':twitter.count(token)}
+from  TwitterData as t,
+      tokens as token
+with  tokens as twitter."word-tokens"(t.text)
+group by token as tok
+;