The SQL Editor was warning about missing RLS even when the same query
enabled it, if the user wrote `ALTER TABLE IF EXISTS ...`. The parser
regex didn't recognise `IF EXISTS` and was capturing `IF` as the table
name, so the RLS event never matched the `CREATE TABLE`.
**Changed:**
- `ALTER TABLE` regex in `sql-event-parser.ts` now accepts the optional
`IF EXISTS` and `ONLY` modifiers, matching Postgres's `ALTER TABLE [ IF
EXISTS ] [ ONLY ] name` grammar.
**Added:**
- Unit tests for `IF EXISTS`, `ONLY`, and both combined.
- Regression test in `SQLEditor.utils.test.ts` using the customer's
exact SQL.
## To test
1. Open the SQL Editor and paste:
```sql
CREATE TABLE IF NOT EXISTS public."Conversations" (id int8 primary key);
ALTER TABLE IF EXISTS public."Conversations" ENABLE ROW LEVEL SECURITY;
```
2. Hit Run – the "table will not have RLS" warning should **not**
appear.
3. Sanity check: a `CREATE TABLE` without any matching `ENABLE ROW LEVEL
SECURITY` still triggers the warning.
Addresses
[FE-3134](https://linear.app/supabase/issue/FE-3134/sql-editor-warns-about-missing-rls-policy-incorrectly).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Tests**
* Added comprehensive test coverage for Row Level Security detection
across different SQL syntax patterns and clause combinations
* **Bug Fixes**
* Enhanced Row Level Security detection capabilities in the SQL editor
by extending support for additional ALTER TABLE statement syntax
variations, improving the accuracy and completeness of security
configuration recognition
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: Alaister Young <10985857+alaister@users.noreply.github.com>
