The SQL plugin is stateless, so troubleshooting is mostly focused on why a particular query fails.
The most common error is the dreaded null pointer exception, which can occur during parsing errors or when using the wrong HTTP method (POST vs. GET and vice versa). The POST method and HTTP request body offer the most consistent results:
"query": "SELECT * FROM my-index WHERE ['name.firstname']='saanvi' LIMIT 5"
}
```
If a query isn't behaving the way you expect, use the `_explain` API to see the translated query, which you can then troubleshoot. For most operations, `_explain` returns OpenSearch query DSL. For `UNION`, `MINUS`, and `JOIN`, it returns something more akin to a SQL execution plan.