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When using a multibyte character set such as UTF8, you would be well advised to use the CHAR modifier in the VARCHAR2/CHAR definition that is, use VARCHAR2(80 CHAR), not VARCHAR2(80), since your intention is likely to define a column that can in fact store 80 characters of data You may also use the session or system parameter NLS_LENGTH_SEMANTICS to change the default behavior from BYTE to CHAR I do not recommend changing this setting at the system level; rather, use it as part of an ALTER SESSION setting in your database schema installation scripts Any application that requires a database to have a specific set of NLS settings makes for an unfriendly application Such applications generally cannot be installed into a database with other applications that do not desire these settings, but rely on the defaults to be in place.

Place this program in a file called HelloNAnt.cs. Now write the following NAnt script to build an application. Call it HelloNAnt.build. Listing 3.1 NAnt build script to clean and compile a Windows application

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package org.hibernate.auction.model; public interface Auditable { public Long getId(); }

Open SSMS, and then connect to the SQL Server database instance where SQL Server Agent is started. The management of SQL Server Agent is embedded in the Database Engine Object Explorer connection in SSMS. Within the Object Explorer window, expand the SQL Server database instance and then expand SQL Server Agent, as Figure 4-7 shows.

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One other important thing to remember is that the upper bound of the number of bytes stored in a VARCHAR2 is 4,000 However, even if you specify VARCHAR2(4000 CHAR), you may not be able to fit 4,000 characters into that field In fact, you may be able to fit as few as 1,000 characters in that field if all of the characters take 4 bytes to be represented in your chosen character set! The following small example demonstrates the differences between BYTE and CHAR and how the upper bounds come into play We ll create a table with three columns, the first two of which will be 1 byte and one character, respectively, with the last column being 4,000 characters.

For the final touch, let s configure the action mapping, as shown in listing 14.11. The mapping requires us to specify a path in this case, /viewCategory. We then use the type attribute to identify the fully qualified class name of the Action class that will be used to process the request. In this example, our type is BeanAction. BeanAction will relay the request to a behavior method located on the form bean that the action mapping uses. This is determined based on the form bean name used in the name attribute of the action mapping. Here we will use the catalogBean that we configured earlier. We then use the scope attribute to specify that the form remain in a session scope. We set the validate attribute to false because there is no input to validate. Lastly, the <forward> tag, which rests in the body of the action mapping, is used to determine which page will be forwarded to. The name attribute maps to the value returned by the behavior method of the presentation bean. In our case, we will always receive a return value of success and thus forward to /catalog/ Category.jsp. Next let s try our hand at the service layer.

'VB: Imports System Imports System.Data.SqlTypes Imports System.Text.RegularExpressions Imports Microsoft.SqlServer.Server ... <SqlFunction(IsPrecise:=True, Isdeterministic:=True)> _ Public Shared Function IsRegExMatch(ByVal input As SqlString, ByVal pattern As SqlString) _ As SqlBoolean If input.IsNull Or pattern.IsNull Then Return SqlBoolean.Null ' Return NULL if either parameter is NULL. End If Return CType(Regex.IsMatch(input.Value, pattern.Value), SqlBoolean) End Function ...

The rest of the Load event handler s code loads existing records from the PatronPayment table, plus the original overdue fine, if any, from the PatronCopy.Fine database field. Later, when the user clicks the Add button to add a new financial event to the patron-and-item-copy entry, the SaveEventData routine equivalent to the SaveFormData method in most of the other forms we ve developed so far saves the updated information in the database. This routine needs to save the new charge or payment in the PatronPayment table, plus update the charge and payment summary in the PatronCopy record. Add the code that writes out these records, just after the calculations for the fineAmount and paidAmount variables in the SaveEventData method.

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