Update README.md

README.md

@@ -104,7 +104,7 @@ throughout the codebase, but a few larger additions worth noting:
   FTS is a process that runs in the master node, and periodically
   polls the segments to maintain the status of each segment.
 
-## Basic GPDB source configuration, compilation, gpdemo cluster creation and test execution example
+## Build GPDB with Planner
 
 ```
 # Configure build environment to install at /usr/local/gpdb
@@ -124,6 +124,26 @@ make cluster
 source gpdemo-env.sh
 ```
 
+## Build GPDB with GPORCA
+
+```
+# Configure build environment to install at /usr/local/gpdb
+./configure --enable-orca --with-perl --with-python --with-libxml --prefix=/usr/local/gpdb
+
+# Compile and install
+make
+make install
+
+# Bring in greenplum environment into your running shell
+source /usr/local/gpdb/greenplum_path.sh
+
+# Start demo cluster (gpdemo-env.sh is created which contain
+# __PGPORT__ and __MASTER_DATA_DIRECTORY__ values)
+cd gpAux/gpdemo
+make cluster
+source gpdemo-env.sh
+```
+
 ## Regression tests
 
 * The default regression tests