Github user huor commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/1384#discussion_r208433876
--- Diff: src/backend/catalog/cdb_external_extensions.sql ---
@@ -47,3 +47,38 @@ LANGUAGE C STABLE;
CREATE OR REPLACE FUNCTION fixedwidth_out(record) RETURNS bytea
AS '$libdir/fixedwidth.so', 'fixedwidth_out'
LANGUAGE C STABLE;
+
+------------------------------------------------------------------
+-- external HDFS
+------------------------------------------------------------------
+CREATE OR REPLACE FUNCTION hdfs_validate() RETURNS void
+AS '$libdir/exthdfs.so', 'hdfsprotocol_validate'
+LANGUAGE C STABLE;
+
+CREATE OR REPLACE FUNCTION hdfs_blocklocation() RETURNS void
+AS '$libdir/exthdfs.so', 'hdfsprotocol_blocklocation'
+LANGUAGE C STABLE;
+
+------------------------------------------------------------------
--- End diff --
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