create extension if not exists vector;
Fix: Allow Insert Access via Row-Level Security Policy
🔹 Step 1: Go to Supabase Dashboard
Open your Supabase project.

Click on Database → Tables → Select your table (e.g., documents).

🔹 Step 2: Turn ON RLS (if not already)
Go to "Row Level Security" tab. If RLS is enabled, you’ll need to define a policy to allow inserts.

🔹 Step 3: Create a Policy to Allow Insert
Option 1: Allow Full Access to Everyone (for dev/test)
Click "New Policy", then:

Name: Allow Insert

Action: INSERT

Using Expression: true

With Check: true

Or run this SQL in the SQL Editor:

sql
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-- Allow all users to insert
create policy "Allow all inserts"
on documents
for insert
using (true)
with check (true);
⚠️ Warning: This allows anyone to insert rows. Use carefully in production.

✅ (Optional) Turn Off RLS for Development
You can also disable RLS (not recommended for production):

sql
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alter table documents disable row level security;


create or replace function match_documents_langchain(query_embedding vector(1536), match_count int default null)
returns table (
  id bigint,
  content text,
  metadata jsonb,
  embedding vector,
  similarity float
)
language sql
stable
as $$
  select
    id,
    content,
    metadata,
    embedding,
    1 - (embedding <=> query_embedding) as similarity
  from documents
  order by embedding <=> query_embedding
  limit coalesce(match_count, 5);
$$;