Why Am I Getting 'java.sql.SQLException: Exhausted Resultset' in My Oracle Queries?

Navigating "java.sql.SQLException: Exhausted Resultset" in Oracle Database Queries

When accessing an Oracle database via a connection pool in Websphere, developers may encounter the "java.sql.SQLException: Exhausted ResultSet" error while executing queries. This error typically arises when an attempt is made to retrieve data from a resultset that has already been processed.

To resolve this issue, it's essential to understand why this error occurs. When iterating through a resultset using the rs.next() method, the cursor advances to the next row, making the data in the current row available for retrieval. However, once the cursor reaches the end of the resultset, it becomes exhausted and cannot be used to retrieve further data.

In the provided code snippet:

if (rs! = null) (
    while (rs.next ()) (
        count = rs.getInt (1);
    )
)

The code fetches data from the resultset (rs) and populates the count variable. However, the error likely occurred after the loop, when attempting to access the count again, resulting in the "Exhausted ResultSet" exception.

To rectify this issue, it's crucial to retrieve all necessary data within the loop itself, ensuring that the resultset is not exhausted before attempting to access the desired data. By adhering to this practice, developers can avoid the "Exhausted ResultSet" error and ensure accurate data retrieval from Oracle database queries.

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