What is the return type of ResultSet in Java?
This method returns a boolean value specifying whether the ResultSet object contains more rows. If there are no rows next to its current position this method returns false, else it returns true. Using this method in the while loop you can iterate the contents of the result set.
Is it possible to return a ResultSet in Java?
Yes, just like any other objects in Java we can pass a ResultSet object as a parameter to a method and, return it from a method.
How do I return a ResultSet?
To return a result set from an SQL procedure:
- Specify the DYNAMIC RESULT SETS clause in the CREATE PROCEDURE statement.
- DECLARE the cursor using the WITH RETURN clause.
- Open the cursor in the SQL procedure.
- Keep the cursor open for the client application – do not close it.
Which method is used to return a ResultSet?
The ResultSet interface declares getter methods (for example, getBoolean and getLong ) for retrieving column values from the current row. You can retrieve values using either the index number of the column or the alias or name of the column.
What are types of ResultSet?
There are two types of result sets namely, forward only and, bidirectional. Forward only ResultSet: The ResultSet object whose cursor moves only in one direction is known as forward only ResultSet. By default, JDBC result sets are forward-only result sets.
What does ResultSet next return?
Initially the cursor is positioned before the first row. The next method moves the cursor to the next row, and because it returns false when there are no more rows in the ResultSet object, it can be used in a while loop to iterate through the result set.
How do I convert a ResultSet to a list?
You need to use ResultSet#getString to fetch the name . Now, each time you fetch one record, get the name field and add it to your list. Now, since you haven’t given enough information about your DTO , so that part you need to find out, how to add this ArrayList to your DTO .
How do you create a ResultSet in Java?
Generating a ResultSet
PreparedStatement pstmt = dbConnection. prepareStatement(“select * from employees”); ResultSet rs = pstmt. executeQuery(); The ResultSet object maintains a cursor that points to the current row of the result set.
What are different types of result sets?
ResultSet Types
- 1) Forward Only (ResultSet. TYPE_FORWARD_ONLY)
- 2) Scroll Insensitive (ResultSet. TYPE_SCROLL_INSENSITIVE)
- 3) Scroll Sensitive (ResultSet. TYPE_SCROLL_SENSITIVE)
Is ResultSet a list?
results. ResultSet object. As ResultSet is sub-classed from a Python list, it behaves exactly as a Python list object. ResultSet contains a list of query results, where each item in the list is a Marvin ResultRow object.
How does ResultSet work in Java?
A table of data representing a database result set, which is usually generated by executing a statement that queries the database. A ResultSet object maintains a cursor pointing to its current row of data. Initially the cursor is positioned before the first row.