NAME
DEFINE - Defining a named symbol
SYNOPSIS
define [ name ] [ value ]
DESCRIPTION
This defines a named symbol. Symbol names must follow the slonik rules
for constructing identifiers, by starting with a letter, followed by
letters, numbers, and underscores.
Symbol values may contain spaces and may recursively contain symbol
references.
Symbols are referenced by using a ‘@’ followed by the symbol name. Note
that symbol referencing is suppressed inside string literals.
EXAMPLE
define cluster movies;
define sakai 1;
define chen 2;
define fqn fully qualified name;
cluster name = @cluster;
node @sakai admin conninfo = ’service=sakai-replication’;
node @chen admin conninfo = ’service=chen-replication’;
define setMovies id = 1;
define sakaiMovies @setMovies, origin = @sakai;
create set ( @sakaiMovies, comment = ’movies’ );
set add table( set @sakaiMovies, id = 1, @fqn = ’public.customers’,
comment = ’sakai customers’ );
set add table( set @sakaiMovies, id = 2, @fqn = ’public.tapes’,
comment = ’sakai tapes’ );
echo ’But @sakaiMovies will display as a string, and is not expanded’;
VERSION INFORMATION
This command was introduced in Slony-I 1.1
12 May 2010 SLONIK DEFINE(7)