Difference between revisions of "ExecSQL"
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imported>Aeric |
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// Error occurred | // Error occurred | ||
String msg = "Sample: Error during SQL search"; | String msg = "Sample: Error during SQL search"; | ||
Logger.info("Sample:\n" + result.getMessage(), "SQL"); | |||
} | } | ||
else if (resultCode > 0) | else if (resultCode > 0) | ||
| Line 38: | Line 38: | ||
Parameters params = it.next(); // Use a loop if Limit > 1 | Parameters params = it.next(); // Use a loop if Limit > 1 | ||
latest_value = params.get("some_field"); | latest_value = params.get("some_field"); | ||
Logger.info("Sample: latest value = " + latest_value, "SQL"); | |||
} | } | ||
} catch (Exception e) { | } catch (Exception e) { | ||
String msg = "Sample: Exception during SQL search"; | String msg = "Sample: Exception during SQL search"; | ||
Logger.info("Sample:\n" + e.getMessage(), "SQL"); | |||
} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Latest revision as of 23:43, 2 May 2014
Execute a SQL query.
Syntax
- <syntaxhighlight lang="java" enclose="div">
Result result = Functions.execSQL(String query); </syntaxhighlight>
Parameters
- query
- The SQL query to execute.
- Learn more: SQL Syntax
Returns
- Result object. If the return code is greater than zero, use the Result_Class#getIterator method to cycle through the list of Parameters objects it contains, one per record.
Sample Code
This sample retrieves a value from the most recent record that matches the specified criteria:
- <syntaxhighlight lang="java" enclose="div">
try {
String latest_value;
String sql =
"SELECT some_field FROM MyObject " +
"WHERE another_field = '" + someValue + "' " +
"ORDER BY date_created DESC " +
"LIMIT 1";
Result result = Functions.execSQL(sql);
int resultCode = result.getCode();
if (resultCode < 0)
{
// Error occurred
String msg = "Sample: Error during SQL search";
Logger.info("Sample:\n" + result.getMessage(), "SQL");
}
else if (resultCode > 0)
{
// A record was found. (Otherwise, resultCode == 0)
ParametersIterator it = result.getIterator();
Parameters params = it.next(); // Use a loop if Limit > 1
latest_value = params.get("some_field");
Logger.info("Sample: latest value = " + latest_value, "SQL");
}
} catch (Exception e) {
String msg = "Sample: Exception during SQL search";
Logger.info("Sample:\n" + e.getMessage(), "SQL");
} </syntaxhighlight>
Sample App
-
- This sample uses the execSQL operation to populate a JSP page with a list of object records.