.NET/ASP.NET/C#/VB.NET PDF Document SDK

Benchmarking the Use of Numeric Extensions for Retrieving Numeric Collection Elements In this section we take a look at how much the elapsed time improves if we use the Oracle extension methods (such as getIntArray()) instead of the three alternative data retrieval methods (getArray(), getOracleArray(), and getResultSet()). As a first step, we create the schema on which the benchmark will be run. We begin by creating a nested table of number called number_table_type: benchmark@ORA10G> create or replace type number_table_type as table of number; 2 / Type created. Next, we create a table with a column of type number_table_type: benchmark@ORA10G> create table number_table_nt 2 ( 3 nt_col number_table_type 4 ) 5 nested table nt_col store as number_nt; Table created. We then populate the table with one row in which the nested table contains 10,000 random numbers. (For details on the function cast and the keyword multiset, please see the section Creating a Table Containing a Column of the Varray Type of 8.) We then commit the data and query the nested table column data to verify the number of rows in the nested table: benchmark@ORA10G> insert into number_table_nt 2 select 3 cast 4 ( 5 multiset 6 ( 7 select round( dbms_random.value(), 2)*100 8 from all_objects 9 where rownum <= 10000 10 ) as number_table_type 11 ) 12 from dual; 1 row created. benchmark@ORA10G> commit; Commit complete. benchmark@ORA10G> select count(*) from number_table_nt t, table( t.nt_col) v; 10000

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You can create new server controls for ASP.NET on two conceptual levels: user controls and custom (web) server controls. User controls are similar to web forms: they are a collection of server control and/or HTML markup, which is named (declared) and then used via reference. They can also expose public properties that can be set to control various aspects of the user control. In this chapter we consider only user controls. User controls are contained in .ascx files. You can create a new user control in Visual Studio by selecting the Web User Control template from the New/File menu option. The new user control is empty except for a Control directive that acts similarly to the Page directive of a web form. You can add any additional markup as needed. As an example, consider a user control that repeats a given text fragment a specified number of times. Our user control (RepeatText.ascx in Listing 14-10) contains a single control, a placeholder label. The code-behind file is located in RepeatText.ascx.fs, shown in Listing 14-11. Listing 14-10. RepeatText.ascx: A Simple User Control Implemented in F# <%@ Control Language="F#" AutoEventWireup="true" CodeFile="RepeatText.ascx.fs" Inherits="MyUserControl.RepeatText" %> <asp:Label ID="Place" runat="server"/> Listing 14-11. RepeatText.ascx.fs: The Implementation of an ASP.NET User Control #light namespace MyUserControl open System open System.Web.UI.WebControls type RepeatText() = inherit System.Web.UI.UserControl() /// This is the internal state and parameters of the control let mutable text = "" let mutable count = 0 /// This internal control is initialized by ASP.NET [<DefaultValue>] val mutable Place : Label

The following BenchmarkNumericExtension class extends the JBenchmark class (covered in the section Timing Java Programs of 1) to perform our comparison: /** This program compares the effect of using ARRAY methods * specific to numeric collections. We compare the following * for a numeric collection. * 1. Using getArray() * 2. Using getOracleArray() * 3. Using getResultSet() * 3. Using getIntArray() * COMPATIBLITY NOTE: * runs successfully against 9.2.0.1.0 and 10.1.0.2.0 */ import java.math.BigDecimal; import java.sql.SQLException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import oracle.sql.ArrayDescriptor; import oracle.sql.ARRAY; import oracle.sql.Datum; import book.util.JDBCUtil; import book.util.JBenchmark; import book.util.Util; class BenchmarkNumericExtension extends JBenchmark { public static void main(String args[]) throws Exception { Util.checkProgramUsage( args ); Connection conn = null; try { conn = JDBCUtil.getConnection("benchmark", "benchmark", args[0]); The method _fetchArray() retrieves the array from the database using the techniques covered earlier: ARRAY array = _fetchArray( conn ); We then execute the benchmark by invoking the method _runBenchmark() explained shortly: new BenchmarkNumericExtension()._runBenchmark( conn, new Object[] { array } ); } finally { // release JDBC resources in the finally clause. JDBCUtil.close( conn ); } }

Since XML is a native type like int, varchar, etc., adding an XML column to a table is the same as adding any other type of column. For example, the following script creates a table with an XML column: CREATE TABLE Customer( CustomerId int NOT NULL, CustomerData xml NOT NULL, ) This script creates a Customer table with two fields: CustomerId and CustomerData. Notice that CustomerData is typed as an XML column. You can also define XML typed parameters in stored procedures. Again, as the following example shows, simply define it like any other type of parameter: CREATE PROCEDURE SaveCustomer( @CustData xml ) AS --- stored proc code ... GO