PreparedStatement Pros and Cons

PreparedStatement Pros and Cons

In this tutorial, we are going to discuss about PreparedStatement Pros and Cons. Using PreparedStatement in Java for database operations has several advantages and disadvantages:

Advantages

• Performance will be improved when compared with simple Statement because query will be compiled only once.
• Network traffic will be reduced between java application and database because we are not required to send query every time to the database.
• Best Suitable to insert Large Objects (CLOB, BLOB)
• We are not required to provide input values at the beginning and we can provide dynamically so that we can execute same query multiple times with different sets of values.
• It allows to provide input values in java style and we are not required to convert into database specific format.
• Best suitable to insert Date values.
• It prevents SQL Injection Attack.

Disadvantages 

1. Increased Complexity: While PreparedStatement provides benefits in terms of performance and security, it can introduce additional complexity to the code, especially for simple queries where the overhead of parameterization and preparation may not be justified.
2. Limited Dynamic Query Structure: PreparedStatement is designed for parameterized queries with fixed SQL query structures. It may not be suitable for queries with dynamically changing structures or complex dynamic SQL generation requirements.
3. Resource Consumption: PreparedStatement objects consume database resources, such as database connections and memory, especially when they are prepared and cached for reuse. In high-concurrency environments or applications with many distinct queries, this resource consumption can become significant.
4. Overhead for Single Use: For queries that are executed only once or infrequently, the overhead of preparing and caching PreparedStatement objects may outweigh the performance benefits. In such cases, using dynamically generated SQL statements may be more efficient.

We can use PreparedStatement for only one sql query (Like CDMA Phone), but we can use simple Statement to work with any number of queries (Like GSM Phone).

E.g:

Statement st = con.createStatement();
st.executeUpdate("insert employees...");
st.executeUpdate("update employees...");
st.executeUpdate("delete employees...");

Here We Are Using One Statement Object To Execute 3 Queries

But,

PreparedStatement pst = con.prepareStatement("insert into employees...");

Here PreparedStatement object is associated with only insert query.

Note

Simple Statement can be used only for static queries where as PreparedStatement can used for both static and dynamic queries.

Differences between Statement and PreparedStatement 

1. Statement

At the time of creating Statement Object, we are not required to provide any Query.

Statement st = con.createStatement(); 

Hence Statement Object is not associated with any Query and we can use for multiple Queries.

• Whenever we are using execute Method, every time Query will be compiled and executed.
• Statement Object can work only for Static Queries.
• Relatively Performance is Low.
• Best choice if we want to work with multiple Queries.
• There may be a chance of SQL Injection Attack.
• Inserting Date and Large Objects (CLOB and BLOB) is difficult.

 2. PreparedStatement

At the time of creating PreparedStatement, we have to provide SQL Query compulsory and will send to the Database and will be compiled.

PrepareStatement pst = con.prepareStatement(query); 

Hence PrepareStatement is associated with only one Query.

• Whenever we are using execute Method, Query won’t be compiled just will be executed.
• PrepareStatement Object can work for both Static and Dynamic Queries.
• Relatively Performance is High.
• Best choice if we want to work with only one Query but required to execute multiple times.
• There is no chance of SQL Injection Attack.
• Inserting Date and Large Objects (CLOB and BLOB) is easy.

Overall, PreparedStatement is a powerful tool for improving performance and security in Java database applications, but it should be used judiciously and balanced with considerations of code complexity and resource consumption.

That’s all about the PreparedStatement Pros and Cons in JDBC. If you have any queries or feedback, please write us email at contact@waytoeasylearn.com. Enjoy learning, Enjoy Java.!!