is a very powerful feature of MyBatis. It enables programmers write the query using the dynamic
. MyBatis uses a powerful Dynamic
statement. Following are the OGNL based Dynamic
expressions provided by MyBatis when, otherwise trim where, set foreach The if Statement The most common thing to do in dynamic
is conditionally include a part of a where clause. For example −
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C++20 ❤ SQL
John R Bandela, MDOverview
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SQL
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C++ Example
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Implementation techniques
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u Parsing compile time strings into meta_structsOverview
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SQL
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C++ Example {price_from_user};Avoiding SQL Injection Attacks
SELECT orders.id, name, item, price, discount_code
FROM orders JOIN customers ON customers.id = customerid
WHERE price > ?;SQL Library Options
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Traditional Lots of information available
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Vulnerable to sql injection of developer not careful
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Use dynamic typingDomain Specific Language
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Use types to encode SQL
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Looks more like regular C++
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Typically requires
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Firebird Internals Inside a Firebird Database Norman Dunbar Version 1.2, 13 August 2021 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . document is to try to explain what goes on inside a Firebird database. Much of the information in this manual has been extracted from the Firebird source code — mainly on the ODS related code and headers patiently answered on the Firebird Support forums where the developers hang out. Much hex dumping of database files was undertaken in the creation of this document, but no Firebird databases were harmed
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Firebird Database Cache Buffer Norman Dunbar, Martin Köditz Version 1.2, 28 May 2020 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. The Firebird Cache. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table of Contents 1 Chapter 1. Introduction Firebird uses a page cache to hold pages in memory. It is much quicker to retrieve pages from RAM than to
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Firebird Backup File Splitting Filter Norman Dunbar Version 1.2, 19 June 2020 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . split large backup files even if gsplit is supplied with your Firebird release. Gsplit is only supplied with the Windows version of Firebird 1.5, it is not supplied with the Linux version. Linux doesn’t it can split files using the split command as well as using gbak. In testing with Firebird 1.5 and Firebird 2.0 on Windows XP Home and WIndows 2000, gsplit doesn’t seem to work properly and always
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Firebird Interactive SQL Utility Kamala Vadlamani, Paul Vinkenoog, Norman Dunbar, Mark Rotteveel Version 1.0, 24 December 2021 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . ISC_PASSWORD Environment Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 11. SQL Dialects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 18.18. SET SQL DIALECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Firebird Password File Utility Norman Dunbar Version 1.5, 18 June 2020 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . various Firebird databases. Using various options, users can be added, amended or deleted from the security database. A privileged user is an account on the database server which the Firebird engine are: • root • firebird • interbase • interbas (without the 'e') Normal users, ie all those accounts not listed above, can only see their own user details from version 2.0 of Firebird . They can, however
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Firebird Database Housekeeping Utility Norman Dunbar, Mark Rotteveel Version 2.1, 13 November 2023 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 11.3. New Startup and Shutdown States in Firebird 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 12. Database -? switch, results in the following screen of helpful information: gfix usage instructions for Firebird 3.0.7 usage: gfix [options] plausible options are: -ac(tivate_shadow) activate
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