Re: Role for CSV import

2011/5/15 Rob Sargent <robjsargent@gmail.com>:
>
>
> Tarlika Elisabeth Schmitz wrote:
>>
>> I have a database that will be populated solely by CSV import.
>> There are several CSV file formats, all denormalized.
>>
>> I have created interim tables which match the CSV file formats. An
>> insert trigger distributes the data to their appropriate destination
>> tables. The destination tables themselves have insert/update triggers
>> for automated data clean-up. Any unresolvable inconsistencies are
>> reported in a log table.
>>
>> I don't want the triggers to fire for every insert/update. There might
>> be situations where I have to perform some data clean-up manually.
>>
>> So, my idea is to create a role for import, query current_user in the
>> trigger, perform the trigger actions for importuser and just return the
>> row unadulterated for adminuser.
>>
>> I would give privileges to the importuser for the tables being
>> explicitly and implicitly populated.
>>
>> Is that the best way to organize this?
>>
>>
>> =====
>> setup: PostgreSQL 8.4
>> dbname = schema name = admin name
>>
>>
>>
>
> You seem to be writing denormalized import records for the sole purpose of
> writing other normalized records. Have you you looked into writing a
> programme in a relatively high-level jdbc-friendly language which reads the
> csv file, normalizes the data (the code already in your triggers) and
> flushes on every say 1000 independent records? The "clean-up" and logging
> might also be done by the import app (all depending on what's being cleaned
> up and logged :) )

pgloader may be useful:
http://pgloader.projects.postgresql.org

>
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Cédric Villemain               2ndQuadrant
http://2ndQuadrant.fr/     PostgreSQL : Expertise, Formation et Support