Hippo is a fast, yet scalable, sparse database indexing approach. In contrast to existing tree index structures, Hippo avoids storing a pointer to each tuple in the indexed table to reduce the storage space occupied by the index. Hippo only stores disk page ranges that represent the indexed database table and maintains histogram-based summaries for the page ranges. The summaries are brief histograms which represent the data distribution of one or more pages. The main contributions of Hippo are as follows:
Low Indexing Overhead
Competitive Query Performance
Fast Index Maintenance
Play around with Hippo index
For the ease of testing, we have implemented Hippo index into PostgreSQL kernel (9.6.1) as one of the backend access methods. This verision has been tested on Ubuntu Linux LTS 14.04/16.04.
Download the source code
$ git clone https://github.com/Sarwat/hippo-postgresql.git
Build and Installation
Once you've synced with GitHub, the folder should contain the source code for PostgreSQL. The build and installation steps are exactly same with official PostgreSQL.
$ cd SourceFolder $ ./configure $ make $ su $ make install $ adduser postgres $ mkdir /usr/local/pgsql/data $ chown postgres /usr/local/pgsql/data $ su - postgres $ /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data $ /usr/local/pgsql/bin/postgres -D /usr/local/pgsql/data >logfile 2>&1 & $ /usr/local/pgsql/bin/createdb test $ /usr/local/pgsql/bin/psql test
You may need to install some required packages to pass the installation if use Ubuntu 14.04. Please try the following command:
$ sudo apt-get install build-essential libreadline-dev zlib1g-dev flex bison libxml2-dev libxslt-dev libssl-dev
PostgreSQL Regression Test
After the installation, you have to make sure the source code on your machine pass all the PostgreSQL Regression Tests (157 in total).
$ cd SourceFolder $ make check
Usage in SQL
Here list some SQL commands of Hippo index. For more details, please see the following Hippo index test SQL script:
./src/test/regress/sql/hippo.sql (Default) ./src/test/regress/sql/hippo_random.sql
ALTER TABLE hippo_tbl ALTER COLUMN randomNumber SET STATISTICS 500; ANALYZE hippo_tbl; CREATE INDEX hippo_idx ON hippo_tbl USING hippo(randomNumber) WITH (density = 20);
SELECT * FROM hippo_tbl WHERE randomNumber > 1000 AND randomNumber < 2000;
Insert new records into Hippo
INSERT INTO hippo_tbl ... ... ...;
Delete old records from Hippo
DELETE FROM hippo_tbl WHERE randomNumber > 1000 AND randomNumber < 2000; VACUUM;
DROP INDEX hippo_idx;
Currently supported data type
Currently supported operator
<, <=, =, >=, >
Hippo Video Demonstration
Want to have a try? Do not hesitate!
Watch this video (No need for headsets) and learn how to get started: Hippo Video Demonstration (on remote computer) or Hippo Video Demonstration (on Youtube).
Jia Yu, Raha Moraffah, Mohamed Sarwat. "Hippo in Action: Scalable Indexing of a Billion New York City Taxi Trips and Beyond". (Demo paper)
(To appear) In Proceedings of the IEEE International Conference on Data Engineering, ICDE 2017, San Diego, CA, USA, April 2017
Jia Yu, Mohamed Sarwat. "Hippo: A Fast, yet Scalable Database Indexing Approach". (Research paper)
In proceedings of the Very Large Data Bases Endowment, PVLDB 2016, Volume 10, Issue 4. To be presented in VLDB 2017, Munich, Germany, August 2017
Hippo index is one of the projects under DataSys Lab at Arizona State University. The mission of DataSys Lab is designing and developing experimental data management systems (e.g., database systems).
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
PostgreSQL has many language interfaces, many of which are listed here:
See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions.
The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.