02-22-2014
Post your table definitions(i.e columns) for your two tables so we can assist you in learning how to join the two tables to produce the output you desire.
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LEARN ABOUT LINUX
mnesia_registry
mnesia_registry(3erl) Erlang Module Definition mnesia_registry(3erl)
NAME
mnesia_registry - Dump support for registries in erl_interface.
DESCRIPTION
The module mnesia_registry is usually part of erl_interface , but for the time being, it is a part of the Mnesia application.
mnesia_registry is mainly an module intended for internal usage within OTP, but it has two functions that are exported for public use.
On C-nodes erl_interface has support for registry tables. These reside in RAM on the C-node but they may also be dumped into Mnesia tables.
By default, the dumping of registry tables via erl_interface causes a corresponding Mnesia table to be created with mnesia_registry:cre-
ate_table/1 if necessary.
The tables that are created with these functions can be administered as all other Mnesia tables. They may be included in backups or repli-
cas may be added etc. The tables are in fact normal Mnesia tables owned by the user of the corresponding erl_interface registries.
EXPORTS
create_table(Tab) -> ok | exit(Reason)
This is a wrapper function for mnesia:create_table/2 which creates a table (if there is no existing table) with an appropriate set
of attributes . The table will only reside on the local node and its storage type will be the same as the schema table on the local
node, ie. {ram_copies,[node()]} or {disc_copies,[node()]} .
It is this function that is used by erl_interface to create the Mnesia table if it did not already exist.
create_table(Tab, TabDef) -> ok | exit(Reason)
This is a wrapper function for mnesia:create_table/2 which creates a table (if there is no existing table) with an appropriate set
of attributes . The attributes and TabDef are forwarded to mnesia:create_table/2 . For example, if the table should reside as
disc_only_copies on all nodes a call would look like:
TabDef = [{{disc_only_copies, node()|nodes()]}],
mnesia_registry:create_table(my_reg, TabDef)
SEE ALSO
mnesia(3erl), erl_interface(3erl)
Ericsson AB mnesia 4.4.17 mnesia_registry(3erl)