fix(adapter): add fallback lookup for uploaded DBs in /tmp/nl2sql_dbs

adapters/llm/openai_provider.py

@@ -148,6 +148,8 @@ CRITICAL RULES:
 7. Do not add unnecessary parentheses or formatting
 8. Match exact column and table names from the schema (case-sensitive)
 9. NEVER return empty SQL. If unsure, return the simplest valid SQL that answers the question.
+10. Use exact identifiers from `schema_preview` (case-insensitive match).
+11. Do NOT invent or pluralize table names. E.g., use `Artist`, not `artists`.
 
 IMPORTANT:
 - For counting all rows: Use COUNT(*) not COUNT(column_name)
@@ -298,6 +300,8 @@ IMPORTANT RULES:
 3. Preserve the original intent of the query
 4. Follow SQLite syntax rules
 5. Don't add aliases or table prefixes unless necessary
+6. Use exact identifiers from `schema_preview` (case-insensitive match).
+7. Do NOT invent or pluralize table names. E.g., use `Artist`, not `artists`.
 
 Return ONLY the corrected SQL query, nothing else."""
 

app/routers/nl2sql.py

@@ -157,8 +157,15 @@ def _select_adapter(db_id: Optional[str]) -> Union[PostgresAdapter, SQLiteAdapte
     if db_id:
         cleanup_stale_dbs()
         path = get_db_path(db_id)
+
+        if not path or not os.path.exists(path):
+            tmp_path = Path("/tmp/nl2sql_dbs") / f"{db_id}.sqlite"
+            if tmp_path.exists():
+                path = str(tmp_path)
+
         if path and os.path.exists(path):
-            return SQLiteAdapter(path)
+            return SQLiteAdapter(str(path))
+
         raise HTTPException(
             status_code=404, detail=f"db_id not found or expired: {db_id}"
         )