8.5.72 wasNull()
- Organization of this subsection
(1) Function
This method returns a value indicating whether the last column value acquired is the null value.
(2) Format
public synchronized boolean wasNull() throws SQLException
(3) Arguments
None.
(4) Return value
If the last column value acquired is NULL, the method returns true; otherwise, the method returns false.
This method returns false before any column value has been acquired by a getXXX method.
(5) Exceptions
The JDBC driver throws an SQLException in the following cases:
-
This ResultSet object is closed.
This includes the case where the ResultSet object was closed because the Statement object that created this ResultSet object was closed.
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The Connection used to create the Statement object that created this ResultSet object has been closed.
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The ResultSet object has become invalid due to transaction settlement.