All this problem stems from the fact that the column field is NULL allowed in the database. And sorry guys for telling you that its a NPE while in fact its SQLException (noob here). If the column is null, the ResultSet should return null. normally, you can call the wasNull() method. 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 www.american-rails-forums.comble method creates a ResultSet, rs, when it executes the query through the Statement object, www.american-rails-forums.com that a ResultSet object can be created through any object that implements the Statement interface. The String being null is a very good chance, but when you see values in your table, yet a null is printed by the ResultSet, it might mean that the connection was closed before the value of ResultSet was used.

Allow null result set for executequery

This can easily occur when using IDEs which allow auto import generation (when more then one class matches the used class name, a drop-down list is displayed for possible imports. Selecting the wrong import is a common event, unfortunately). 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 www.american-rails-forums.comble method creates a ResultSet, rs, when it executes the query through the Statement object, www.american-rails-forums.com that a ResultSet object can be created through any object that implements the Statement interface. no I want to allow only date query statements such as select or desc so am using www.american-rails-forums.comeQuery() but its allowing data manipulation queries also in oracle – DnA Jan 6 '17 at Then, the Statement object’s executeQuery() method is called to execute the SQL SELECT statement, returning a ResultSet into rset. A ResultSet (which we will cover in great detail in Chapter 10) is an object that has a set of accessor methods that allow you to get to the data returned from the database. All this problem stems from the fact that the column field is NULL allowed in the database. And sorry guys for telling you that its a NPE while in fact its SQLException (noob here). If the column is null, the ResultSet should return null. normally, you can call the wasNull() method.WHERE Updatable Result Sets JDBC allows creating updatable result sets. public class UpdatableRS { public static void main(String [] args) { Connection conn = null; executeQuery(sqlStmt); while (www.american-rails-forums.com()) { rs. NULL value in v for an empty result set. v7 output D:\>java call_select_javasp NULL CHAR); /* Execute query */ www.american-rails-forums.come(); String retValue=cst. But the resultset in the java app even though was not null, yet contained no records. One thing, the java executeQuery() was able to execute without any exceptions. . This allows the conversation to still make sense later. Inserting Rows Using a ResultSet It's possible to insert rows by calling the executeUpdate If the field in the database doesn't allow NULL values, you'll get an. ResultSet boolean wasNull() throws SQLException; * Reports whether * the last column read had a value . executeQuery(); www.american-rails-forums.com(); www.american-rails-forums.comn(rs.

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