Github user huor commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/1384#discussion_r208433762
--- Diff: contrib/exthdfs/exthdfs.c ---
@@ -0,0 +1,472 @@
+/*
+ * 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.
+ */
+
+
+
+#include "postgres.h"
+
+#include "common.h"
+#include "access/extprotocol.h"
+#include "cdb/cdbdatalocality.h"
+#include "storage/fd.h"
+#include "storage/filesystem.h"
+#include "utils/uri.h"
+
+
+
+
+PG_MODULE_MAGIC;
+
+PG_FUNCTION_INFO_V1(hdfsprotocol_blocklocation);
+PG_FUNCTION_INFO_V1(hdfsprotocol_validate);
+
+Datum hdfsprotocol_blocklocation(PG_FUNCTION_ARGS);
+Datum hdfsprotocol_validate(PG_FUNCTION_ARGS);
+
+Datum hdfsprotocol_blocklocation(PG_FUNCTION_ARGS)
+{
+
+ // Build the result instance
+ int nsize = 0;
+ int numOfBlock = 0;
+ ExtProtocolBlockLocationData *bldata =
+ palloc0(sizeof(ExtProtocolBlockLocationData));
+ if (bldata == NULL)
+ {
+ elog(ERROR, "hdfsprotocol_blocklocation : "
+ "cannot allocate due to no memory");
+ }
+ bldata->type = T_ExtProtocolBlockLocationData;
+ fcinfo->resultinfo = bldata;
+
+ ExtProtocolValidatorData *pvalidator_data = (ExtProtocolValidatorData *)
+
(fcinfo->context);
+
+
+ // Parse URI of the first location, we expect all locations uses the
same
+ // name node server. This is checked in validation function.
+
+ char *first_uri_str =
+ (char *)strVal(lfirst(list_head(pvalidator_data->url_list)));
+ Uri *uri = ParseExternalTableUri(first_uri_str);
+
+ elog(DEBUG3, "hdfsprotocol_blocklocation : "
+ "extracted HDFS name node address %s:%d",
--- End diff --
Indent should follow the convention as previous code
---
