qr code scanner for java free download C AUTION If you change the object type to be different than the source data field type, certain in Java

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formula functions within Desktop Intelligence will generate an error Within Web Intelligence, the query may not run at all Also, parsing the object or running a universe integrity check will give you an error Clearly, having users do extra conversions for what should be a simple task is poor universe design To prevent users from having to do extra conversions, a business-oriented universe designer may try to help users by converting the number field to a date field (or number to character, and so on) in the objects SQL select statement This might seem good in theory, but in practice, it can pose additional problems in terms of query performance
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Classes and Objects
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Object Type Number Date Character
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Explanation Any measure objects must have the object type of Number Fields that are in date format in the data source should be set to date type in the universe Fields that are character in the data source should be set to character as the object type Numeric fields that are not measures and that will not benefit from calculations may also be set to character Long text fields are generally used for comments and note fields The length of the long text object returned in a query can be controlled and is specific to each universe; it is set under File | Parameters | Controls
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TABLE 9-2 Object Types Correspond to Physical Database Field Formats
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With most RDBMSs, if you change the appearance of a field, the index will not be used when the query uses such an object as a condition Therefore, work closely with the DBA or analyze an explain plan whenever you use SQL functionality to convert field types (See 11 for more on creating advanced objects)
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C AUTION If you specify a character database field as a number and attempt to use it as a measure,
BusinessObjects XI will drop any rows that contain characters from your report
Properties
The Properties tab of the Edit Properties dialog box sets the object type or qualification, the aggregates if it s a measure, and settings for a list of values or pick list when users insert an object as a query condition
Part II:
A Better Universe
To navigate to the Properties for the object Month Number: 1 Within the universe pane, double-click the Month Number object from the list of classes and objects 2 Select the Properties tab 3 The Month Number is a dimension, so leave this radio button checked 4 By default, dimension and detail objects have an associated list of values This check box is enabled and Designer provides a system-generated list name Change the list name of the associated list of values to MonthNN Lists of values and these settings are explained in more detail in 10 5 Click OK to close the dialog
Advanced
The Advanced tab controls who can access the object, where the object can be used in a query, and date formats On the Advanced tab, security access level settings interact with other settings discussed in 13 The Public setting allows all users to access an object and is the default For each object, you can control whether the object can be used as a result, a condition, or a sort as described in Table 9-3
NOTE Concerned with response time issues, some DBAs may disagree with the recommendations
in Table 9-3, but it provides the most user flexibility You need to weigh the risk of users creating inefficient queries and affecting system response times versus modifying these options and having an overly restrictive deployment that prevents them from asking valid business questions
Can Be Used As A Result Condition Explanation A result is a column in a query or a report Most often, all objects are results Conditions relate to the WHERE clause of a SQL statement If your universe accesses an OLTP, you may want to disallow nonindexed fields as conditions, as they may result in slow queries and bog down the source system If you are in a data warehouse environment, I recommend allowing all objects as conditions It s true that you may want users to search on the indexed CUSTOMER_ CODE, for example, but what if there are several related customers that all start with the same first few letters, such as Deloitte & Touche They could have the forms Deloitte Consulting, Deloitte & Touche Management Solutions, Deloitte Parsipanny office, etc If you allow Customer Name as a condition, a user could select everything starting with Deloitte Sort allows users to sort results on the server rather than on the client As with conditions, I suggest allowing this on all objects In most cases, users will sort their results within the report once they see the data However, if users want to select top 10 product sales, or top 100 customers, the sort must be processed on the server
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