Update incremental-models.md

[zvijayakumar]

If event_time is NULL or the table is truncated, the condition will always be true and load all records. This is an edge case.

If a final table is truncated it will return the NULL as the result

( select * from table where event_time > NULL ) --> return no results

It will not have any data in it and dbt considers it as incremental load. then the model will fail, to avoid that situation. In dbt we don't have anything to handle this situation.

What are you changing in this pull request and why?

Checklist

• Review the Content style guide so my content adheres to these guidelines.
• For docs versioning, review how to version a whole page and version a block of content.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Adding or removing pages (delete if not applicable):

• Add/remove page in website/sidebars.js
• Provide a unique filename for new pages
• Add an entry for deleted pages in website/vercel.json
• Run link testing locally with npm run build to update the links that point to deleted pages

[welcome]

Hello!👋 Thanks for contributing to the dbt product documentation and opening this pull request! ✨
We use Markdown and some HTML to write the dbt product documentation. When writing content, you can use our style guide and content types to understand our writing standards and how we organize information in the dbt product docs.
We'll review your contribution and respond as soon as we can. 😄

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 20, 2024 10:15am

[mirnawong1]

hey @zvijayakumar, thanks for opening this up and great addition for this edge case! i like the addition of preventing errors if the SQL engine interprets the string differently or fails to convert it properly. will get this merged for you!

i would recommend (if you haven't already) searching for or adding an issue in the dbt core repo to flag the edge case safeguarding. thanks again and looking forward to you future contributions !