Make the llm prompt stricter (#505)

This is to avoid complex SQL queries

server/src/handlers/http/llm.rs

@@ -72,10 +72,8 @@ fn build_prompt(stream: &str, prompt: &str, schema_json: &str) -> String {
     format!(
         r#"I have a table called {}.
 It has the columns:\n{}
-Based on this, generate valid SQL for the query: "{}"
-Generate only SQL as output. Also add comments in SQL syntax to explain your actions.
-Don't output anything else.
-If it is not possible to generate valid SQL, output an SQL comment saying so."#,
+Based on this schema, generate valid SQL for the query: "{}"
+Generate only simple SQL as output. Also add comments in SQL syntax to explain your actions. Don't output anything else. If it is not possible to generate valid SQL, output an SQL comment saying so."#,
         stream, schema_json, prompt
     )
 }
@@ -84,7 +82,7 @@ fn build_request_body(ai_prompt: String) -> impl serde::Serialize {
     json!({
         "model": "gpt-3.5-turbo",
         "messages": [{ "role": "user", "content": ai_prompt}],
-        "temperature": 0.6,
+        "temperature": 0.7,
     })
 }