Hey developers! 👋 Today I want to share some insights about the delete statement in Uniface 10.4. This powerful command is essential for database operations, but it comes with some important considerations that every Uniface developer should know.

🎯 What Does the Delete Statement Do?

The delete statement in Uniface deletes the current occurrence from the database. Simple as that! But there's more to it than meets the eye. 🔍

📊 Return Values You Need to Know

When you execute a delete statement, it returns different values in $status depending on the outcome:

🔧 Error Handling with $procerror

The $procerror variable provides additional error information:

• -2 through -12 (UIOSERR_*): Database I/O errors 💾
• -16 through -30 (UNETERR_*): Network I/O errors 🌐
• -1 (UGENERR_ERROR): General error - no entities painted 🎨

⚠️ Important Usage Guidelines

Here's where it gets crucial! The delete statement should be used with care:

CAUTION: Use this statement only in the delete trigger and, with extreme caution, in the deleteUp trigger. If you place it in another trigger, make sure to lock the occurrence as soon as possible! 🔐

💡 Practical Example

Here's how you typically use the delete statement in practice:

trigger Delete
    delete
end ; Delete

Clean and simple! 🎯

🔥 Key Takeaways

• Always check the $status return value
• Use proper error handling with $procerror
• Stick to using delete in appropriate triggers
• Lock occurrences when necessary for data integrity

The delete statement is allowed in all component types, making it a versatile tool in your Uniface toolkit! 🛠️

Happy coding, and remember to always handle your database operations with care! 🚀

📚 Based on Uniface Documentation 10.4 | ✨ Created with AI assistance