How Can I Enable SQL Debugging for Core Data in Xcode 4?

Mastering Core Data SQL Debugging within Xcode 4

Efficiently debugging Core Data applications in Xcode 4 often requires examining the raw SQL queries generated by Core Data. This guide details how to enable detailed SQL logging within your Xcode 4 development environment.

To enable this crucial debugging feature, access your project's scheme settings by navigating to "Product" -> "Edit Scheme." Select the appropriate scheme for your application. In the "Arguments" tab, locate the "Arguments Passed On Launch" field. Add the argument -com.apple.CoreData.SQLDebug 4. The numerical value (1-4) controls the verbosity of the logging; higher numbers provide more detailed output.

With this setting activated, your Xcode console will now display the executed SQL queries, alongside any associated error messages. The console output is located in the same area as standard NSLog output.

It's important to note that this modification should only be applied to your testing scheme. Applying these changes to other schemes might result in unexpected application behavior.

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