Description
This is a component library desinged to enhance database related functionality provided by Borland Delphi/BCB VCL library. It combines some generic improvements as well as improvements pertaining to specific implementations (currently: DBISAM Database Engine by Elevate Software & NexusDB Database Engine by Nexus Database Systems Pty Ltd.) of base VCL classes designed for navigational database access.Database Extensions Suite provides following additional functionality:Persistent Database Schema. Database Schema contains the description of tables, relations between them as well as triggers and sql statements that could be used to update a database to the version required by the current version of application. Database Schema may be stored within application or in the database (System tables) or as an external file.RI Constraints. Relations between tables, defined within database schema, allows to implement various types of referential integrity (RI) constrains (Error, Cascade and Nullify for delete & update operations). Please, note, that processing of RI constraints might sometimes considerably slow down some delete and update operations.Replications. All changes made to records can be automatically written into a separate table (lObjectsl tables) and used for database replications. TxxDatabaseExt provides methods, that could be used to create & synchronize snapshots with the main database.Additional events and properties provided for database, table and query components.Database Extensions Suite comes with Context Database Designer (included in the license price), which is used as a component editor for TDatabaseSchema component, which allows to draw great looking diagrams, manage schema versions (Version Control feature), automatically produce update SQL DDL scripts for various database engines and more.
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