[fdo-users] Re: SQLite provider and transactions/batch inserts/

Romica Dascalescu Romica.Dascalescu at autodesk.com
Tue Apr 27 09:14:20 EDT 2010

Hi Igor,

You should not clear the  property values collection, you should just set the new values to the property value and set null for null properties.
Also the slow insert can be because 3.4 provider uses file journal, 3.5 provider uses memory journal.

From: fdo-users-bounces at lists.osgeo.org [fdo-users-bounces at lists.osgeo.org] On Behalf Of Jackie Ng [jumpinjackie at gmail.com]
Sent: Tuesday, April 27, 2010 5:53 AM
To: fdo-users at lists.osgeo.org
Subject: [fdo-users] Re: SQLite provider and transactions/batch inserts/

Hi Igor,

I use the following bulk insert logic for FDO Toolbox. It is based on the
SQLiteConverter implementation, and has no adverse performance effects (that
I know of) for other providers:

Create the fdo insert command *ONCE*
Obtain a pointer/reference to its PropertyValues collection

For each feature to be inserted:
- Clear this collection
- Load up with property values to be inserted
- Execute the insert command
- Repeat

The key here is creating the insert command once, and reusing the property
value collection repeatedly.

Since you're working with C++ directly, you might as well look at the
SQLiteConverter source as it does what I just described.

- Jackie
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