pg_complex ========== PG_complex is a PostgreSQL C-language extension that implements a user-defined type (UDT) for complex numbers. It is intended for educational purposes, not production use. (Seriously, why would anyone store complex numbers in a relational database?) The UDT demonstrates the use of composite types. A discussion of the creation and use of this extension can be found at http://invariantproperties.com/2015/07/17/extending-postgresql-complex-number-data-type/. Installation ------------ To build it, just do this: make make installcheck make install If you encounter an error such as: "Makefile", line 8: Need an operator You need to use GNU make, which may well be installed on your system as `gmake`: gmake gmake install gmake installcheck If you encounter an error such as: make: pg_config: Command not found Be sure that you have `pg_config` installed and in your path. If you used a package management system such as RPM to install PostgreSQL, be sure that the `-devel` package is also installed. If necessary tell the build process where to find it: env PG_CONFIG=/path/to/pg_config make && make installcheck && make install And finally, if all that fails (and if you're on PostgreSQL 8.1 or lower, it likely will), copy the entire distribution directory to the `contrib/` subdirectory of the PostgreSQL source tree and try it there without `pg_config`: env NO_PGXS=1 make && make installcheck && make install If you encounter an error such as: ERROR: must be owner of database regression You need to run the test suite using a super user, such as the default "postgres" super user: make installcheck PGUSER=postgres Once pg_complex is installed, you can add it to a database. If you're running PostgreSQL 9.1.0 or greater, it's a simple as connecting to a database as a super user and running: CREATE EXTENSION pg_complex; If you've upgraded your cluster to PostgreSQL 9.1 and already had pg_complex installed, you can upgrade it to a properly packaged extension with: CREATE EXTENSION pg_complex FROM unpackaged; For versions of PostgreSQL less than 9.1.0, you'll need to run the installation script: psql -d mydb -f /path/to/pgsql/share/contrib/pg_complex.sql If you want to install pg_complex and all of its supporting objects into a specific schema, use the `PGOPTIONS` environment variable to specify the schema, like so: PGOPTIONS=--search_path=extensions psql -d mydb -f pg_complex.sql Dependencies ------------ The `pg_complex` data type has no dependencies other than PostgreSQL. Copyright and License --------------------- Copyright (c) 2015 Bear Giles .