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Add note about pgstac UPDATE behavior. #384

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2 changes: 2 additions & 0 deletions docs/src/pgstac.md
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Expand Up @@ -215,6 +215,8 @@ You can add notification triggers alongside pgstac to get notified when items ar

**Important:** Do NOT create these in the `pgstac` schema as they could be removed in future migrations.

**Note on pgSTAC's UPDATE behavior:** For performance and consistency, `update_item()` in pgSTAC uses a **DELETE+INSERT** pattern instead of a direct SQL `UPDATE`. As a result, standard `UPDATE` triggers will not fire during these operations. Applications that rely on change notifications should implement logic that accounts for this behavior.

#### Example Notification Setup

Here's an example of how to set up notification triggers for item changes:
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