Re: fetchLimit don't affect SQL fetching limit?
Re: fetchLimit don't affect SQL fetching limit?
- Subject: Re: fetchLimit don't affect SQL fetching limit?
- From: Kieran Kelleher <email@hidden>
- Date: Tue, 26 Jun 2012 10:41:04 -0400
It depends on the database plugin you are using. Some plugins take the fetchSpec fetchLimit and incorporate it into the SQL statement in the plugin's EOSQLExpression subclass. The default behaviour of EOF is to limit in memory after the fetch.
On Jun 26, 2012, at 10:23 AM, Gennady Kushnir wrote:
> Hello all!
> I am fetching from a table that has lots of records. So I decided to
> fs.setFetchLimit(10) on my EOFetchSpecification, but nevertheless when
> I perform ec.objectsWithFetchSpecification(fs) I get
> JavaOutOfMemoryError.
> It seems to me that fetchLimit does not actually convert to a LIMIT
> clause in a SELECT statement in underlaying SQL. So the actual
> limitation is made in memory after fetch.
> Is it a conventional behavior or it is me doing something wrong?
>
> Gennady
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