Data Access Worldwide May 16 – 18, 2007 Copyright 2007, Data Access Worldwide May 16 – 18, 2007 Copyright 2007, Data Access Worldwide Standardizing Application Deployment on SQL Servers Stephen W. Meeley

May 16 – 18, 2007 SQL Connectivity Kits Microsoft SQL Server IBM DB2 (Windows and Linux) ODBC Current release Build 17 in February Build 22 in April Build 30 in September Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 4.x Support for Standard Tables Support for Record Identity Hiding for developing database independent software Server Side Restructuring for faster copy operations when a table definition is changed Structure_End Rollback Support that enables rollback of changes made to the database definition if a failure occurs Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 4.x New Record Identity Method attribute that replaces the old Primary_Index_Trigger setting Case insensitive indexes Support for read only columns Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x Performance Enhancements Forward only cursors ☼ Fastest type ☼ Used for all finds outside of transactions and all the time for tables set not to lock Block cursors ☼ Fetch multiple rows based on block size (except on find EQ) ☼ Adjustable timeout and effectiveness metrics Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x Performance Enhancements Better use of multiple statement handles JIT Binding ☼ Columns over threshold size are not placed in the buffer on a normal find operation – only when first accessed ☼ Threshold can be set on a driver level ☼ Binding can be set on a table level Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x Login Silent Login ☼ Turns off automatic dialog when login information is incorrect – error only Redirect Connection ☼ Connects to a different database without closing tables ☼ All open tables must be present and identical in both databases Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x Login Automatic Client Selection (SQL Server) ☼ Selects newer 2005 client (if installed) Connection IDs ☼ Logical identification used rather then the actual connection string ☼ An application can access the same set of tables in multiple databases with only one set of intermediate files Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x Error System Ignore Warnings Error Context Information DateTime datatype support when used with Visual DataFlex 12.1 Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Revision 5.x New Attributes Driver Database / Connection Bug Fixes User Count Synchronization Same system used in Visual DataFlex Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Standardizing on SQL Servers Benefits Industry standard databases help sell your solutions Stability Performance Scalability But, the costs are prohibitive for smaller sites… Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Express SQL Servers Industry leaders now offer free “Express” versions of their world-class SQL servers. These high performance, highly reliable database products are ideally suited for use with Visual DataFlex solutions in many small and medium businesses. Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 SQL Server 2005 Express Single processor 1 Gb memory 4 Gb database Various configurations from 37 Mb (base server) to 262 Mb (base server, management studio, full text search, report services) Simple redistribution agreement Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Express Connectivity in Revision 5 Express Connectivity is a special, no-entry-cost Connectivity Kit license for deployment only with a commercial Visual DataFlex Client License and a free “Express” SQL server (MSSQL or DB2). Add a no-cost Connectivity Kit to new 1, 3 and 5 user Visual DataFlex Client Licenses and DataFlex for Linux Runtimes. Subscription renewals for Client Licenses that include Express Connectivity will be priced as Client Licenses with Connectivity. Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Features and Benefits No start-up costs for developers or end users to begin using Express Databases The reliability, performance and flexibility of market leading DBMS servers as the back end for Visual DataFlex and DataFlex for Linux applications Minimal recurring cost (Client License annual subscription price increments to Client License with Connectivity) Copyright 2007, Data Access Worldwide

May 16 – 18, 2007 Limitations Maximum of five users - larger user counts require fee-based, commercial Connectivity Kit licensing Can only be used with designated free “Express” Servers. Fee-based Connectivity Kits are required with fee-based DBMS server products. Can only be used with 5-Session Web Application Servers Copyright 2007, Data Access Worldwide