1,350 for keyed tables and 4,000 for unkeyed tables. To conserve disk space, you want to try to get your record size as close to a multiple of a block size as possible (minus 6 bytes, which are used by Paradox to manage the table). After a block size is set for a table, that size is fixed, and all blocks in the table will be of that size. Paradox stores records in fixed blocks of 1024, 2048, 3072, and 4096 in size. Knowing the interworkings can save you disk space. Even if part or all of the record is empty, the space is claimed. Tables with close to a million records are common.ģ Specifications of Paradox for Windows Appendix A 3 Block size can be 1024, 2048, 3072, or Paradox stores data in fixed records. Tables of 190,000 records are easily achievable (and you can have more if you don t use up the 1,350- bytes-per-record limit for a keyed table). Because of the 256MB file size limit and other factors such as block size, however, the limit is much smaller. Tables can have up to 127 secondary indexes. A primary index can have up to 16 fields. 256MB file size limit if the table is in Paradox format and using a 4K block size. Following are the specifications for standard Paradox tables. Use 3 for Compatible tables and 4 for Standard tables (the default). #Inmagic dos free download driver#In the BDE Configuration Utility, the level option for the Paradox driver dictates what default table type is created by Paradox for Windows. Earlier versions of the Paradox table type are referred to as the Compatible table type. Other products that use the standard format include Paradox for DOS version 4.5, ObjectVision 2.1, and Paradox for Windows versions 1.0 and 4.5. Paradox Standard Table Specifications The Paradox standard table format was introduced in Paradox for DOS version 4. #Inmagic dos free download drivers#ODBC drivers include: Text, Excel spreadsheets, Access, DB2, AS/400, Btrieve, Ingres, and HP ALBASE/SQL (many others are also available). ODBC support requires ODBC Driver Manager 2.0. SQL Database Servers: Interbase Server, Oracle, Sybase, Microsoft SQL Server, Informix, and DB/2. Local table types supported: Paradox 3.5, 4, Paradox 1.0 for Windows 3.x, Paradox 5.0 for Windows 3.x, Paradox 7, dbase III Plus, dbase IV, dbase for Windows, and Visual dbase. Following are a few of the specifications for the BDE. #Inmagic dos free download software#Borland Database Engine (BDE) The Borland Database Engine (BDE) was also referred to as IDAPI and ODAPI in previous versions of software released by Borland, including Paradox for Windows, dbase for Windows, Quattro Pro, and ReportSmith. This appendix is provided to try to make up for the lack of a centralized location on Paradox and dbase tables, ObjectPAL, and general Paradox limits. 1 Specifications of Paradox for Windows Appendix A 1 Specifications of Paradox for Windows A IN THIS CHAPTER Borland Database Engine (BDE) 000 Paradox Standard Table Specifications 000 Paradox 5 Table Specifications 000 Paradox 7 Table Specifications 000 dbase IV Table Specifications 000 dbase V Table Specifications 000 Paradox and dbase Field Type Specifications 000 ObjectPAL (Applies to Forms, Scripts, and Libraries) 000 Queries 000 Launching Parameters 000Ģ 2 Appendixes Part VI For some reason, Borland is a little reluctant to publish specifications for Paradox.
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