Json_from_sql

Question

I've found that into FLOWS_030100.wwv_flow_ajax package there are some json procedures, but I don't understand how they work, they're not documented.
Anybody knows how to use these procedures?

Answer 1

I have successfully used the json_from_sql procedure provided in the flows and here is how to use it...
1. First create an ondemand application process. I named mine MAKE_JSON.
2. Inside that process call the json_from_sql procedure like so:
HTMLDB_UTIL.JSON_FROM_SQL('SELECT * FROM table_name');3. Lastly you need to make an ajax call to fire off the application process like so:
  <script type="text/javascript">
      function getJSON()
        var get = new htmldb_Get(null,$v('pFlowId'),'APPLICATION_PROCESS=MAKE_JSON',0);
        var gReturn = get.get();
  </script>4. Here is a sample of the JSON object that is returned from the procedure:
(The structure will resemble the select statement.
This particular table has 3 columns: PK_ID, NAME, LNAME)
  {"row":[{"PK_ID":"0001","NAME":"Scott","LNAME":"Tiger"},
          {"PK_ID":"0002","NAME":"Tyson","LNAME":"Jouglet"}]}5. The code to access the information stored in the structure looks like this:
    $x('item_id').value = row[0].PK_ID; // 0001
    $x('item_id').value = row[0].NAME;  // Scott
    $x('item_id').value = row[0].LNAME; // Tigernull