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* Allow TZMySQLResultSet.Open() to succeed in the event of a query which yields no results. With these last fixes in place, you can experiment with removing the two exceptions that the zeos mysql driver itself throws when asked to run eg Open() but no results are returned.
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</div><div class="article" lang="en"><div class="titlepage"><div><div><h1 class="title"><a id="d4e1"></a>ZeosDBO Technical Info</h1></div><div><h3 class="corpauthor">ZeosLib Development Group</h3></div><div><p class="pubdate">09 July 2004</p></div></div><hr></div><p>ZeosDBO is a database middleware components for Borland development tools, including Delphi, C++ Builder and Kylix.</p><p>The following compilers are supported:</p><div class="itemizedlist"><ul type="disc" compact><li>Delphi 5 - 7 and 9</li><li>Lazarus (FreePascal)</li><li>C++ Builder 5 - 6</li><li>Kylix 2 - 3</li></ul></div><p>ZeosDBO supports direct connectivity to the following databases using the vendor provided, native interface:</p><div class="itemizedlist"><ul type="disc" compact><li>MySQL 3.20 - 4.1</li><li>PostgreSQL 6.5 - 7.4</li><li>Firebird 1.0 - 1.5</li><li>Interbase 5.0 - 7.5</li><li>Microsoft SQL Server 7, 2000</li><li>Sybase ASE 12.0, 12.5</li><li>Oracle 9i</li><li>SQLite 2.8</li></ul></div><p>For other databases we propose to use implemented Active Data Objects (ADO) Bridge.</p><p>Advantages of using ZeosDBO:</p><div class="itemizedlist"><ul type="disc" compact><li>Platform independance. The ZeosDBO is highly generic. Applications written in ZeosDBO can be migrated across databases without major changes.</li><li>ZeosDBO is open source, written for usability and extensibility.</li><li>ZeosDBO leverages the amazing power of the Delphi development environment without relying on a performance killing middleware.</li><li>ZeosDBO is an extremely thin abstraction layer, unlike 'thick' layered protocols like ADO and BDE.</li></ul></div><p>Package contents:</p><div class="orderedlist"><ol type="1" compact><li><tt class="classname">ZCore</tt> - Core classes and interfaces. Contains Java style objects and collections as well as compatibility types and functions.</li><li><tt class="classname">ZParseSql</tt> - SQL specific for syntax and lexical analysis.</li><li><tt class="classname">ZPlain</tt> - Native plain API to supported SQL servers.</li><li><tt class="classname">ZDbc</tt> - Port of Java Database Connectivity API (JDBC 2.0). DBC API acts as intermediate layer between Plain API and highlevel <tt class="classname">TDataset</tt> or <tt class="classname">DBExpress</tt> components</li><li><tt class="classname">ZComponent</tt> - visual components descended from <tt class="classname">TDataset</tt>.</li></ol></div><p>Installed components:</p><div class="orderedlist"><ol type="1" compact><li><tt class="classname">TZConnection</tt>: This component encapsulates the database connection and transaction management.</li><li><tt class="classname">TZReadOnlyQuery</tt>: TDataset component to execute SQL queries and process data in read-only mode.</li><li><tt class="classname">TZQuery</tt>: TDataset component which allows data modifications in regular and cached mode.</li><li><tt class="classname">TZUpdateSQL</tt>: Analog of standard TUpdateSQL component to explicite definition of Insert/Update/Delete SQL statements for TDataset modifications.</li><li><tt class="classname">TZStoredProc</tt>: The component to execute SQL stored procedures.</li><li><tt class="classname">TZSQLProcessor</tt>: The component to execute SQL scripts for different SQL and various delimiter types.</li><li><tt class="classname">TZSQLMonitor</tt>: The component to monitor all outgoing SQL queries and other logging information.</li><li><tt class="classname">TZSQLMetadata</tt>: Specialized TDataset component which provides an access to database metadata such as tables, columns, indices, etc.</li></ol></div><p>The project home page is here (for news, links and other project info): <a href="http://www.zeoslib.net" target="_top">http://www.zeoslib.net</a></p><p>The sourceforge development site is located here (for technical resources and anonymous web based cvs access):<a href="http://www.sourceforge.net/projects/zeoslib" target="_top"> http://www.sourceforge.net/projects/zeoslib</a></p><p>Thank you for using our software,</p><p>The ZeosLib Development Group</p></div><div xmlns="" id="customfooter">
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