# start HDFS
start-dfs.sh
 
# Do some basic tests to make sure HDFS works
hadoop fs -lr /
hadoop fs -mkdir /test
hadoop fs -put ./testfile /
hadoop fs -get /testfile .

# The Apache HAWQ source code can be obtained from the the following link: 
# Apache Repo: https://git-wip-us.apache.org/repos/asf/incubator-hawq.git or 
# GitHub Mirror: https://github.com/apache/incubator-hawq. 
git clone https://git-wip-us.apache.org/repos/asf/incubator-hawq.git
 
# The code directory is incubator-hawq.
CODE_BASE=`pwd`/incubator-hawq
 
cd $CODE_BASE
 
# Run command to generate makefile.
./configure

# Or you could use --prefix=/hawq/install/path to change the Apache HAWQ install path, 
# and you can also add some optional components using options (--with-python --with-perl)
# For El Capitan (Mac OS 10.11), you may need to specify: ./configure LDFLAGS="-L/usr/local/lib" CFLAGS="-I/usr/local/include" if the configure cannot find some components
./configure --prefix=/hawq/install/path --with-python --with-perl

# You can also run the command with --help for more configuration.
./configure --help


# Run command to build and install
# To build concurrently , run make with -j option. For example, make -j8
# On Linux system without large memory, you will probably encounter errors like
# "Error occurred during initialization of VM" and/or "Could not reserve enough space for object heap"
# and/or "out of memory", try to set vm.overcommit_memory = 1 temporarily, and/or avoid "-j" build,
# and/or add more memory and then rebuild.
# On mac os, you will probably see this error: "'openssl/ssl.h' file not found". 
# "brew link openssl --force" should be able to solve the issue.
make -j8
 
# Install HAWQ
make install

# Before initializing HAWQ, you need to install HDFS and make sure it works.
# Besides you need to set password-less ssh on the systems.
source /hawq/install/path/greenplum_path.sh
hawq init cluster # after initialization, HAWQ is started by default

# Now you can stop/restart/start the cluster by using:  
hawq stop/restart/start cluster
 
# HAWQ master and segments are completely decoupled. So you can also init, start or stop the master and segments separately.
# For example, to init: hawq init master, then hawq init segment
# to stop: hawq stop master, then hawq stop segment
# to start: hawq start master, then hawq start segment
 

psql -d postgres
create table t ( i int );
insert into t values(1);
insert into t select generate_series(1,10000);
select count(*) from t;

# Unit test. To do unit test, go to the src/backend and run unittest.
cd $CODE_BASE/src/backend
make unittest-check

# Code coverage
cd $CODE_BASE
./configure --enable-coverage --enable-debug (for debug build), or ./configure --enable-coverage (for opt build)
make -j8
make install
run some test to exercise hawq (i.e., unit test, install check, feature test, etc)
make coverage-show to see summary code coverage information in console, and detailed code coverage information in CodeCoverageReport (html format)
make coverage-show filter="./src/backend/executor/nodeAgg.c -d ./src/backend/commands" to see code coverage for specific files or directories
make coverage-reset to clear code coverage statistics
 
# Installcheck-good test. After installing HAWQ, please ensure HDFS work before initializing HAWQ. 
source /install/dir/greenplum_path.sh
hawq init cluster
make installcheck-good

# Feature test
cd $CODE_BASE
make feature-test
./feature-test to run all feature test, or ./feature-test --gtest_filter=TestCommonLib.TestSqlUtil to run test suite TestCommonLib.TestSqlUtil