S3 Select API Support for CSV (#6127)

Add support for trivial where clause cases

vendor/github.com/xwb1989/sqlparser/Makefile

@@ -0,0 +1,22 @@
+# Copyright 2017 Google Inc.
+# 
+# Licensed 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.
+
+MAKEFLAGS = -s
+
+sql.go: sql.y
+	goyacc -o sql.go sql.y
+	gofmt -w sql.go
+
+clean:
+	rm -f y.output sql.go