format
Synopsis
This format function produces output formatted according to a format string (in a style similar to the C function sprintf).
This format is an extension of the built-in format function, as it is string interpolation with named format parameters.
Description
For example, given an HStore with key 'location' and value 'World',
SELECT format('Hello %(location)s!', hstore('location', 'World'));
would produce the following:
Hello World!
Usage
Format specifiers are introduced by a % character followed by a paranthesized key name and take the form:
%([key name])[flags][width]type
where the component fields are:
key name (required)
A valid HStore key
flags (optional)
Additional options controlling how the format specifier's output is formatted. Currently the only supported flag is a minus sign (-) which will cause the format specifier's output to be left-justified. This has no effect unless the width field is also specified.
width (optional)
Specifies the minimum number of characters to use to display the format specifier's output. The output is padded on the left or right (depending on the - flag) with spaces as needed to fill the width. A too-small width does not cause truncation of the output but is simply ignored. The width may be specified using a positive integer.
type (required)
The type of format conversion to use to produce the format specifier's output. The following types are supported:
s formats the argument value as a simple string. A null value is treated as an empty string.
I treats the argument value as an SQL identifier, double-quoting it if necessary.
L quotes the argument value as an SQL literal.
In addition to the format specifiers described above, the special sequence %% may be used to output a literal % character.
Support
http://github.com/melanieplageman/format/issues
Author
Melanie Plageman melanieplageman@gmail.com
Copyright and License
Copyright (c) 2016 Melanie Plageman