![]() Try (PreparedStatement insert = connection. This example shows how to create a prepared statement with an insert statement with parameters, set values to those parameters and then executing the statement. The dashboard is where you start to drill down into the more detailed data views. perfino gives you fine-grained control over what level of performance is acceptable for your application. SQLFeatureNotSupportedException - if sqlType is a ARRAY, BLOB, CLOB, DATALINK, JAVA_OBJECT, NCHAR, NCLOB, NVARCHAR, LONGNVARCHAR, REF, ROWID, SQLXML or STRUCT data type and the JDBC driver does not support this data type Basic usage of a prepared statement When you log into perfino, the dashboard shows you if everything is OK or if something is going wrong. SQLException - if parameterIndex does not correspond to a parameter marker in the SQL statement if a database access error occurs or this method is called on a closed PreparedStatement 4) Execute the SQL query using PreparedStatement. ![]() 3) Set the parameter values for PreparedStatement. To execute the PreparedStatement we require the following steps. Pstmt = connection.prepareStatement("INSERT INTO CLOB_TABLE(CLOB_VALUE) VALUES (?)") Using PreparedStatement we can also improve the performance of the application. LongContentWriter.write("This will be the content of the CLOB") Writer longContentWriter = tCharacterStream(1) // position: beginning Clob longContent = connection.createClob() While executing statements using Statement object, especially insert statements, each time a query is executed the whole statement is compiled and executed again and again where, the only difference among these statements is the values of the statements. It is typed, so the second parameter has to be provided, see //setting a NULL for an integer value These cases can be handled by using setNull. Setting a null value can not be accomplished using for example the setInt and setLong methods, as these use primitive types ( int and long) instead of objects ( Integer and Long), and would cause a NullPointerException to be thrown: void setFloat(int parameterIndex, float x) PreparedStatement statement = connection.prepareStatement(sql) Create statement to make your operations Placeholders in the query string need to be set by using the set* methods: String sql = "SELECT * FROM EMP WHERE JOB = ? AND SAL > ?" This is achieved either by sending the parameter values separately, or because the driver escapes values correctly as needed. The added benefit of the parameter placeholders, is that it provides protection against SQL injection. This allows the statement to be prepared (and optimized) once on the server, and then reused with different sets of parameters. A PreparedStatement declares the statement before it is executed, and allows for placeholders for parameters.
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