CallableStatement.wasNull
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public abstract boolean wasNull() throws SQLException
Returns
true if the last parameter read was SQL NULL
Description
An OUT parameter may have the value of SQL NULL; wasNull reports
whether the last value read has this special value.
Note: You must first call getXXX on a parameter to
read its value and then call wasNull() to see if the value was
SQL NULL.
Exceptions
SQLException
if a database-access error occurs.