SQL++ support in AsterixDB:
1. implemented SQL++ expression to logical plan translator;
2. refactored REST API to be agnostic of query languages;
3. disabled fuzzy join queries for SQL++ runtime tests;
4. fixed several rewriting rules.

Change-Id: I82919c4527b304325059519d819a2c30cf2902a9
Reviewed-on: https://asterix-gerrit.ics.uci.edu/479
Reviewed-by: Till Westmann <tillw@apache.org>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
diff --git a/asterix-app/src/test/resources/runtimets/only_sqlpp.xml b/asterix-app/src/test/resources/runtimets/only_sqlpp.xml
new file mode 100644
index 0000000..b3542eb
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/only_sqlpp.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<!--
+ ! 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.
+ !-->
+<test-suite xmlns="urn:xml.testframework.asterix.apache.org" ResultOffsetPath="results" QueryOffsetPath="queries_sqlpp">
+    <test-group name="failed">
+    </test-group>
+</test-suite>