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< Open Telecom Platform (OTP) ~ [Q] how to create table definition and table at runtime |
| vsp |
 Posted: Sun Jun 06, 2010 4:42 am |
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User
Joined: 03 Mar 2010
Posts: 14
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Hello,
I need to be able to define a mnesia table (and then potentially populate it) at run time.
all the examples I saw before use -record to define a structure and then create the table.
However, in my situation it is only at runtime I can 'devise' that information.
And then I need all of my modules to be able to access this newly created table.
thanks in advance |
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| bpuzon |
| Posted: Mon Jun 07, 2010 9:22 am |
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User
Joined: 05 Aug 2009
Posts: 23
Location: Cracow, Poland
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I think you can simply create your table on runtime using
Code:
mnesia:create_table(something, [{attributes, [some_atoms]}])
[some_atoms] does not _have_ to be created from record_info(). |
_________________
Saludos,
Bartłomiej Puzoń
Erlang Solutions |
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| vsp |
| Posted: Mon Jun 07, 2010 5:49 pm |
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User
Joined: 03 Mar 2010
Posts: 14
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thank you,
but this would not allow me to 'use' the table from modules, correct?
In other words, there is no way for me to introspect a table definition and then create a 'record structure' for it ?
thank you |
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| bpuzon |
| Posted: Mon Jun 07, 2010 6:42 pm |
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User
Joined: 05 Aug 2009
Posts: 23
Location: Cracow, Poland
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Well, records are syntactic sugar and disappear after the preprocessing. So everything you can do with records, you can do without as well.
If for some reason mnesia:table_info(table, attributes) doesn't work for you (why?) you might need to send the (generated) attributes to your other processes that wish to use the table. |
_________________
Saludos,
Bartłomiej Puzoń
Erlang Solutions |
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| wuji |
| Posted: Sat Aug 11, 2012 2:15 am |
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