How To Endure Callable Contention Inward Coffee To Telephone Band Stored Procedure? Jdbc Example

The CallableStatement of JDBC API is used to telephone band a stored physical care for from Java Program. Calling a stored physical care for follows the same pattern every bit creating PreparedStatment together with than executing it. You starting fourth dimension require to practice a database connectedness past times supplying all the relevant details e.g. database URL, which comprise JDBC protocol together with hostname, username, together with password. Make certain your JDBC URL is acceptable past times JDBC driver you lot are using to connect to the database. Every database vendor uses unlike JDBC URL together with they have got unlike driver JAR which must hold upwards inward your classpath earlier you lot tin run the stored physical care for from Java Program.

Once you lot are done amongst initial setup, you lot tin obtain CallableStatement from Connection past times calling prepareCall(String SQL) method, where SQL must hold upwards inward the format required past times your database vendor e.g. Microsoft SQL Server requires curly braces e.g.
{call Books.BookDetails_Get(?)}.

This stored proc requires an INPUT parameter which must hold upwards laid past times calling setXXX() method on the CallableStatement object earlier you lot tin execute the query.

Once this is done, merely telephone band the executeQuery() method of CallableStatement together with it volition render the ResultSet contains all the rows returned past times this stored proc.

Just loop through ResultSet together with extract all the rows. You have got successfully run the stored physical care for from Java Program using CallableStatement.

Sounds slow right, good it is indeed slow in i lawsuit you lot have got done it once. But, if you lot have got merely starting amongst Java together with JDBC, sometime it may experience overwhelming because of setting upwards a database, including JDBD driver into classpath together with other issues which surface piece connecting to a database. In that case, I propose you lot to starting fourth dimension acquire through a comprehensive Java class like The Complete Java MasterClass - Covers Java 11, instead of learning bits together with pieces. Trust me, you lot volition larn a lot inward a really curt duration of time.

Steps to telephone band a stored physical care for from Java

1) Create a database connection.

Connection con = null; try {    Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");    String url = "jdbc:sqlserver://localhost:42588;";    con = DriverManager.getConnection(url, "username", "pw"); } grab (Exception e) {    e.printStackTrace(); }

2) Create a SQL String
You require to practice SQL using a String variable to telephone band the stored procedure, for example, CallableStatement e.g. {call Books.BookDetails_Get(?)}. This is database dependent, for Oracle the format is unlike it starts amongst BEGIN together with ends amongst ENDS instead of curly braces e.g.

String SQL = "{call Books.BookDetails_Get(?)}" // for Microsoft SQL Server String Oracle = "BEGIN BOOKDETAILS_GET(?); END;";

3) Create CallableStatement Object
You tin practice a CallableStatement past times calling Connection.prepareCall(SQL) method, top the SQL created inward the previous step.

CallableStatement cs = con.prepareCall(SQL);

4)  Provide Input Parameters
You tin laid the input parameter past times calling diverse setXXX() method depending upon the information type of query parameters on the CallableStatement object, similar to PreparedStatment e.g.

cs.setString(1, "982928");

Btw, if you lot are non familiar amongst PreparedStatement together with hence you lot tin too run across my post, difference betwixt PreparedStatement together with CallableStatement to larn more.



5)  Call Stored Procedure
You tin execute a stored physical care for on the database past times calling executeQuery() method of CallableStatement class, every bit shown below:

ResultSet rs = cs.executeQuery();

This volition render a ResultSet object which contains rows returned past times your stored procedure.


6) Extract Rows from ResultSet
You tin acquire the information from the ResultSet past times Iterating over ResultSet together with impress the results or practice Java objects, every bit shown below:

while(rs.next()){   System.out.println(rs.getString(1)); }

This volition impress the starting fourth dimension column of every row. You should too closed the ResultSet object in i lawsuit you lot are done amongst it.


These were the steps you lot require to follow to work the CallableStatement inward JDBC to execute a stored physical care for on the database side together with have information on your Java program. If you lot desire to larn to a greater extent than close JDBC or desire to start from scratch, I recommend Data Access layer closed to stored procedures, which is a dandy design, together with hence you lot should have got a proficient agreement of CallableStatement.

They are the ones which are used to run the stored physical care for from Java programs. By encapsulating your information access logic together with SQL on a stored procedure, allow you lot to alter them easily on SQL editor without making whatsoever alter on Java side, which way you lot tin implement novel functionalities without edifice together with deploying a novel JAR file on Java side.

Further Learning

JSP, Servlet, together with JDBC For Beginners
The Complete Java MasterClass - Covers Java 11

read)

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Top 10 JDBC Interview Question for Java programmers (read)

6 Essential JDBC Performance tips for Java Programmers (tips)

How to connect to MySQL database from Java Program? (tutorial)

JDBC Batch Insert together with Update representative using PreparedStatement (tutorial)

Difference betwixt java.sql.Date, java.sql.Timestamp, together with java.util.Date inward JDBC? (answer)

Thanks for reading this tutorial hence far. If you lot similar this JDBC tutorial together with hence delight percentage amongst your friends together with colleagues. If you lot have got whatsoever questions or feedback together with hence delight drib a note.

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