Alright, so here's the deal. Supabase doesn't come with a built-in feature for automatic indexing. But don't worry, we can make it happen using SQL triggers. Think of a SQL trigger as a little helper that jumps into action whenever a certain operation takes place.

Imagine this: every time a new row gets added to a table, a trigger kicks in to make sure the new data is indexed for faster retrieval. Sounds cool, right?

• First things first, log into your Supabase account.
• Once you're in, open up the project where you want to set up automatic indexing.

• In your chosen project, head over to the SQL tool on the left toolbar.
• The SQL editor is your playground for writing raw SQL queries and scripts directly to your database.

• Now, in the SQL editor, let's start writing a SQL function that will be triggered when a new row is inserted. This function will handle adding the data into a specific index. Here's an example:

CREATE OR REPLACE FUNCTION update_index_on_insert()
RETURNS TRIGGER AS $$
BEGIN
   INSERT INTO index_table(column_to_index) VALUES (NEW.column_to_index);
   RETURN NEW;
END; 
$$ LANGUAGE plpgsql;

What this does is it takes the value from column_to_index in the new row (that's what NEW.column_to_index means) and pops it into the index_table.

• Next up, we need to create the trigger that will call this function whenever a new row is added. Here's how you do it:

CREATE TRIGGER insert_trigger_after_insert
AFTER INSERT ON main_table
FOR EACH ROW 
EXECUTE PROCEDURE update_index_on_insert();

In this script, insert_trigger_after_insert is the name of our trigger, main_table is where the new rows are being added, and update_index_on_insert is the function we wrote earlier.

• Finally, hit the Run button in the SQL editor to execute these scripts. This will set up the trigger and function in your database.

And there you have it! You've now set up automatic indexing using a trigger in Supabase. Remember, different scenarios might need custom functions and triggers. The example here is just a basic way to show you how to use SQL triggers for automatic indexing. Feel free to tweak it to fit your needs.