free barcode generator source code in vb.net Additional Methods of the CallableStatement Object in Software

Encode ANSI/AIM Code 128 in Software Additional Methods of the CallableStatement Object

Additional Methods of the CallableStatement Object
Recognize Code 128A In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Code 128 Code Set A Generator In None
Using Barcode generation for Software Control to generate, create Code 128 image in Software applications.
19:
Code 128C Recognizer In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Code-128 Generator In C#
Using Barcode drawer for Visual Studio .NET Control to generate, create Code 128 Code Set A image in .NET framework applications.
SQL APIs
Code128 Creation In VS .NET
Using Barcode maker for ASP.NET Control to generate, create Code128 image in ASP.NET applications.
Code 128A Creation In Visual Studio .NET
Using Barcode printer for VS .NET Control to generate, create Code128 image in VS .NET applications.
A short example is the best way to illustrate the technique for calling a stored procedure and stored function. Suppose the sample database contains a stored procedure defined like this:
Code-128 Drawer In Visual Basic .NET
Using Barcode printer for .NET framework Control to generate, create Code 128 Code Set C image in .NET framework applications.
Print Data Matrix 2d Barcode In None
Using Barcode maker for Software Control to generate, create Data Matrix image in Software applications.
CREATE (IN OUT IN PROCEDURE CHANGE_REGION OFFICE INTEGER, OLD_REG VARCHAR(10), NEW_REG VARCHAR(10))
GS1 128 Generation In None
Using Barcode generator for Software Control to generate, create UCC-128 image in Software applications.
Printing UPC Code In None
Using Barcode creation for Software Control to generate, create UPC-A Supplement 2 image in Software applications.
that changes the region of an office, as requested by the two input parameters, and returns the old region as an output parameter and a stored function, defined like this:
Creating EAN 13 In None
Using Barcode maker for Software Control to generate, create UPC - 13 image in Software applications.
Paint Bar Code In None
Using Barcode generator for Software Control to generate, create barcode image in Software applications.
CREATE FUNCTION GET_REGION (IN OFFICE INTEGER) RETURNS VARCHAR(10)
Making OneCode In None
Using Barcode generator for Software Control to generate, create USPS Intelligent Mail image in Software applications.
UPC Code Reader In Visual Studio .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
that returns the region of an office, given its office number. This Java program excerpt shows how to invoke the stored procedure and stored function using JDBC:
Code 128C Encoder In Java
Using Barcode generation for Java Control to generate, create Code 128C image in Java applications.
Data Matrix ECC200 Drawer In None
Using Barcode creator for Microsoft Word Control to generate, create Data Matrix 2d barcode image in Word applications.
// The connection object, strings and variables Connection dbconn; // the database connection String str1 = {CALL CHANGE_REGION( , , )} ; String str2 = { = CALL GET_REGION( )} ; String oldreg; // returned former region String ansreg; // returned current region
Generate Code 128C In Visual C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create Code 128 image in VS .NET applications.
Scan UPC A In Visual C#.NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in .NET applications.
<code in here creates the connection>
EAN13 Generation In Java
Using Barcode maker for Java Control to generate, create EAN13 image in Java applications.
Data Matrix ECC200 Drawer In Java
Using Barcode drawer for Java Control to generate, create Data Matrix ECC200 image in Java applications.
// Prepare the two statements CallableStatement cstmt1 = dbconn.prepareCall(str1); CallableStatement cstmt2 = dbconn.prepareCall(str2); // Specify param values & returned data types for stored procedure call cstmt1.setInt(1,12); // call with office number 12 (Chicago) cstmt1.setString(3,"Central"); // and new Central region cstmt1.registerOutParameter(2,Types.VARCHAR); // returns a varchar param
PROGRAMMING WITH SQL
// Go ahead and execute the call to the stored procedure cstmt1.executeUpdate(); oldreg = cstmt.getString(2); // returned (2nd) param is a string
SQL: The Complete Reference
// Specify param values & returned data type for stored function call cstmt2.setInt(1,12); // call with office number 12 (Chicago) cstmt2.registerOutParameter(1,Types.VARCHAR); // fcn returns a varchar // Go ahead and execute the call to the stored function cstmt2.executeUpdate(); ansreg = cstmt.getString(1); // returned value (1st param) is a string // Done close the connection dbconn.close();
Note that the call invocations of the stored procedure or function in the statement strings are enclosed in curly brackets. The input parameters passed to a stored procedure or function are handled exactly the same way as parameters for a prepared statement. Output parameters from a stored procedure require some new machinery: the registerOutParameter() method call to specify their data types, and calls to the get() methods to retrieve their values after the call is complete. These are summarized in Table 19-19. Input/output parameters for a stored procedure require both that values be passed into the procedure call, using the set() methods, and that the output data type be specified with registerOutParameter() and the returned data be retrieved with the get() methods. For a stored function, there are only input parameters, and the set() methods are once again used. The return value of the function is specified with a parameter marker in the prepared statement string. Its data type is registered, and its value is retrieved, just as if it were a regular output parameter.
Error Handling in JDBC
When an error occurs during JDBC operation, the JDBC interface throws a Java exception. Most SQL statement execution errors throw a SQLException. The error can be handled via the standard Java try / catch mechanism. When a SQLException error occurs, the catch() method is called with a SQLException object, some of whose methods are summarized in Table 19-20. The SQLException methods allow you to retrieve the error message, SQLSTATE error code, and DBMS-specific error code associated with the error. It is possible for a single JDBC operation to create more than one error. In this case, the errors are available to your program in sequence. Calling getNextException() on the first reported error returns a SQLException for the second exception, and so on, until there are no more exceptions to be handled.
Scrollable and Updateable Cursors in JDBC
Just as scrollable cursors have been added to the ANSI/ISO SQL standards, scrollable cursors have been added to JDBC result sets in later versions of the specification. You indicate that you want a query to produce results that are scrollable through a parameter
19:
Copyright © OnBarcode.com . All rights reserved.