Can ResultSet be closed?
Table of Contents
Can ResultSet be closed?
To close a Statement , ResultSet , or Connection object that is not declared in a try -with-resources statement, use its close method.
How do I know if a ResultSet is closed?
The isClosed() method of the ResultSet interface is used to determine whether the current ResultSet object is closed.
What is a ResultSet object?
A ResultSet object is a table of data representing a database result set, which is usually generated by executing a statement that queries the database. For example, the CoffeeTables. viewTable method creates a ResultSet , rs , when it executes the query through the Statement object, stmt .
What is the type of ResultSet object?
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.
Why is ResultSet getting closed?
You have opened another connection to the database without closing all other connections. 2.) Your ResultSet may be returning no values. So when you try to access data from the ResultSet java will throw a ResultSetClosedException .
What happens if ResultSet is not closed?
In the mean time many result sets might opened and left unclosed. If it happens on a single database by multiple applications, the data updation is not perfect and may violate ACID properties rule for data presuming.
What is the use of ResultSet object in JDBC?
A ResultSet object maintains a cursor that points to the current row in the result set. The term “result set” refers to the row and column data contained in a ResultSet object. Navigational methods − Used to move the cursor around.
Where is the ResultSet in SQL?
An SQL result set is a set of rows from a database, as well as metadata about the query such as the column names, and the types and sizes of each column. Depending on the database system, the number of rows in the result set may or may not be known.
What does ResultSet mean in SQL?
The result set is an object that represents a set of data returned from a data source, usually as the result of a query. The result set contains rows and columns to hold the requested data elements, and it is navigated with a cursor.
