count_nulls 0.9.3

This Release
count_nulls 0.9.3
Date
Status
Unstable
Latest Stable
count_nulls 0.9.7 —
Latest Testing
count_nulls 0.1.0 —
Other Releases
Abstract
Count the number of null arguments
Description
Provides a function that counts the number of null arguments passed to it.
Released By
decibel
License
BSD 2 Clause
Resources
Special Files
Tags

Extensions

count_nulls 0.9.2
Count the number of null arguments

README

count_nulls

Provides a function that counts the number of (not) null arguments passed to it. Also provides a version for counting nulls in a JSON document, which makes it easy to count the number of nulls in a record.

Installation

To build it, just do this:

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 install

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 test PGUSER=postgres

Once count_nulls 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 count_nulls;

If you've upgraded your cluster to PostgreSQL 9.1 and already had count_nulls installed, you can upgrade it to a properly packaged extension with:

CREATE EXTENSION count_nulls 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/count_nulls.sql

If you want to install count_nulls 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 count_nulls.sql

Dependencies

The count_nulls data type has no dependencies other than PostgreSQL.

Copyright and License

Copyright (c) 2015 Jim Nasby, Blue Treble Consulting http://BlueTreble.com