Stored procedures, triggers, and user-defined functions on by Hernando Bedoya; International Business Machines

By Hernando Bedoya; International Business Machines Corporation. International Technical Support Organization.; et al

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Additional info for Stored procedures, triggers, and user-defined functions on DB2 universal database for iSeries

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The qualification for an object can be omitted. When this happens, it will be implicitly qualified by DB2 UDB for iSeries depending on factors such as: • Naming convention used • Operation in which the object is referenced; for example, the rules for qualifying an object may be different in a CREATE operation than in a CALL operation • Nature of the SQL statement (dynamic or static SQL statement) • Parameters specified on the RUNSQLSTM or CRTSQLxxx CL commands or on the SET OPTION statement To understand how implicit qualification works in SQL PSM modules, first we have to establish that there are two important times for the implicit qualification mechanism: • Creation time: The time in which the CREATE PROCEDURE, CREATE FUNCTION or CREATE TRIGGER is issued • Execution time: The time in which the SQL PSM module (stored procedure, trigger or UDF) is executed At creation time the general behavior of the SQL PSM module is established.

Every row read is updated with the new value for the cuscrd field. The next row is read from the customer table. The output variable is set to its value. Chapter 3: Introduction to the SQL Persisent Stored Module in DB2 UDB for iSeries 31 32 Chapter 3: Introduction to the SQL Persisent Stored Module in DB2 UDB for iSeries [14] The cursor is closed, and the compound statement ends. 6 Using scrollable cursors in SQL PSM This section shows you a simple SQL PSM that implements a scrollable cursor. The procedure finds the maximum value for a given column name and a given table name passed as input parameters.

The Work with Object Locks dialog appears. There should be one job named QZDASOINIT listed. Type 5 in the Option field next to this job as shown in Figure 3-17, and press Enter. Figure 3-17: Finding the database server job On the Work with Job dialog, type option 10 (Display job log, if active or on job queue). The Display Job Log screen appears. Find the first message in the job log, and write down the fully qualified job name for your database server job as shown in Figure 3-18. 52 Chapter 3: Introduction to the SQL Persisent Stored Module in DB2 UDB for iSeries Chapter 3: Introduction to the SQL Persisent Stored Module in DB2 UDB for iSeries 53 Figure 3-18: Job log for a database server job In this case, the fully qualified name is 064728/QUSER/QZDASOINIT.

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