Mnesia schema transaction: Checking if a table exists
Rudolph van Graan
rvg@REDACTED
Thu Mar 4 15:13:09 CET 2004
Hi again,
Thanks for the information - I can now create tables in a transaction.
However, this leads to the next problem...
I am busy creating say 10 tables... As part of my creation script, I
need to check if another table exists, so I made a function like this
one:
table_exists(TableName) ->
Tables = mnesia:system_info(tables),
lists:member(TableName,Tables).
This works fine if I use it outside the schema_transaction for a table
that has just been created. If I use it inside the schema_transaction,
on a table that has just been created in the same transaction, it
fails... Is there some other function I can use to check for a table
that has just been created in the same function and that will query the
changes for the current transaction instead? [The idea is that the
transaction must abort and all the changes rolled back if something
goes wrong here]. I.e. if I do create_table(), and immediately run this
function afterwards, it must return true while inside the schema
transaction.
Regards.
Rudolph van Graan
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