barcode generator vb.net download Embedded SQL in Software

Creation QR-Code in Software Embedded SQL

Embedded SQL
Recognize QR Code 2d Barcode In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Encoder In None
Using Barcode drawer for Software Control to generate, create QR Code JIS X 0510 image in Software applications.
FIGURE 17-3 The embedded SQL development process
QR Code Reader In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
QR Code 2d Barcode Encoder In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create QR image in .NET applications.
figure are actually those used by the IBM mainframe databases (DB2 and SQL/DS), but all products that support embedded SQL use a similar process: 1. The embedded SQL source program is submitted to the SQL precompiler, a programming tool. The precompiler scans the program, finds the embedded SQL statements, and processes them. A different precompiler is required for each programming language supported by the DBMS. Commercial SQL products typically offer precompilers for one or more languages, including C, Pascal, COBOL, FORTRAN, Ada, PL/I, RPG, and various assembly languages. 2. The precompiler produces two files as its output. The first file is the source program, stripped of its embedded SQL statements. In their place, the precompiler substitutes calls to the private DBMS routines that provide the runtime link between the program and the DBMS. Typically, the names and calling sequences of these routines are known only to the precompiler and the DBMS; they are not a public interface to the DBMS. The second file is a copy of all the embedded SQL statements used in the program. This file is sometimes called a database request module (DBRM). 3. The source file output from the precompiler is submitted to the standard compiler for the host programming language (such as a C or COBOL compiler). The compiler processes the source code and produces object code as its output. Note that this step has nothing in particular to do with the DBMS or with SQL.
QR Code Maker In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
Encoding Quick Response Code In VS .NET
Using Barcode printer for VS .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
PART V
Make QR Code In VB.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Quick Response Code image in .NET framework applications.
Code39 Encoder In None
Using Barcode generation for Software Control to generate, create Code39 image in Software applications.
Part V:
Encoding Data Matrix 2d Barcode In None
Using Barcode maker for Software Control to generate, create DataMatrix image in Software applications.
EAN128 Creator In None
Using Barcode generator for Software Control to generate, create UCC-128 image in Software applications.
Programming with SQL
Barcode Creation In None
Using Barcode creator for Software Control to generate, create barcode image in Software applications.
Encode UPCA In None
Using Barcode creation for Software Control to generate, create GTIN - 12 image in Software applications.
4. The linker accepts the object modules generated by the compiler, links them with various library routines, and produces an executable program. The library routines linked into the executable program include the private DBMS routines described in Step 2. 5. The database request module generated by the precompiler is submitted to a special BIND program. This program examines the SQL statements; parses, validates, and optimizes them; and produces an application plan for each statement. The result is a combined application plan for the entire program, representing a DBMS-executable version of its embedded SQL statements. The BIND program stores the plan in the database, usually assigning it the name of the application program that created it. SQLJ programs follow a simpler process, largely because Java is not linked prior to execution: 1. The Java program with embedded SQL is submitted to an SQLJ preprocessor (also called a translator). The translator, also written in Java, produces a .java file, which contains the Java source program with the SQL statements translated into standard Java code (usually in the form of JDBC API calls), and one or more SQLJ profiles, which contain information about the SQL operations. 2. The Java compiler processes the .java file and produces .class files. 3. The link and bind steps are not required. 4. A runtime component is invoked automatically each time the application is run. It uses the SQLJ profiles to assist in completing the SQL commands included in the original source program. The program development steps in Figure 17-3 correlate with the DBMS statement processing steps in Figure 17-1. In particular, the precompiler usually handles statement parsing (the first step), and the BIND utility handles verification, optimization, and plan generation (respectively, the second, third, and fourth steps). Thus, the first four steps of Figure 17-1 all take place at compile-time when you use embedded SQL. Only the fifth step, the actual execution of the application plan, remains to be done at runtime. The embedded SQL development process turns the original embedded SQL source program into two executable parts: An executable program executable program Stored in a file on the computer in the same format as any Stored within the database in the format expected
ISBN - 13 Encoder In None
Using Barcode drawer for Software Control to generate, create ISBN - 10 image in Software applications.
Data Matrix ECC200 Creation In Java
Using Barcode maker for BIRT Control to generate, create DataMatrix image in BIRT reports applications.
Scanning UPC-A In Visual C#.NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications.
Encode USS-128 In None
Using Barcode creator for Office Excel Control to generate, create UCC.EAN - 128 image in Microsoft Excel applications.
Painting Bar Code In VS .NET
Using Barcode printer for .NET Control to generate, create barcode image in .NET framework applications.
EAN 13 Encoder In Java
Using Barcode maker for Android Control to generate, create GS1 - 13 image in Android applications.
Code 128C Generator In Visual Basic .NET
Using Barcode maker for .NET framework Control to generate, create USS Code 128 image in .NET framework applications.
Encoding Code 39 In Objective-C
Using Barcode creation for iPhone Control to generate, create Code 39 Full ASCII image in iPhone applications.
Copyright © OnBarcode.com . All rights reserved.