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/parserts/queries_sqlpp/2.sqlpp b/asterix-app/src/test/resources/parserts/queries_sqlpp/2.sqlpp
new file mode 100644
index 0000000..4921b58
--- /dev/null
+++ b/asterix-app/src/test/resources/parserts/queries_sqlpp/2.sqlpp
@@ -0,0 +1,33 @@
+/*
+ * 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.
+ */
+
+select element {'sig_name':sig_name,'total_count':sig_sponsorship_count,'chapter_breakdown':by_chapter}
+from  Event as event,
+      event.sponsoring_sigs as sponsor
+with  es as {'event':event,'sponsor':sponsor}
+group by sponsor.sig_name as sig_name
+with  sig_sponsorship_count as count(es),
+      by_chapter as (
+      select element {'chapter_name':chapter_name,'escount':count(es)}
+      from  es as e
+      group by e.sponsor.chapter_name as chapter_name
+  )
+order by sig_sponsorship_count desc
+limit 5
+;