© All rights reserved. U.S International Tech Support DBMS: Direct-Access and SQL File Types Nico Spence, Chief Marketing Officer Nick Decker, Engineering Supervisor BASIS International Ltd.

© All rights reserved. U.S International Tech Support Overview ► BASIS DBMS Direct-result-set navigation and maintenance SQL-result-set navigation and maintenance ► New DBMS Objects BBjFileInfo BBjOpenFileInfo ► IOLISTS vs. Templates ► Extended File Types ► DBMS Deployment Options

© All rights reserved. U.S International Tech Support New DBMS Objects ► BBjFileInfo Object Provides object-oriented way to access file information traditionally retrieved from the FID() and FIN() Associated with an open channel, so it provides a dynamic view of the file (methods always return current information) Retrieve information such as  Filename  Filesize  Filetype  Key information  Record information

© All rights reserved. U.S International Tech Support BBjFileInfo Demonstration

© All rights reserved. U.S International Tech Support BBjOpenFileInfo ► Programmatic access to opened file information Advisory Locking Extracted File name Locked Open Type Read Only User ID String Host Name Force Close Documentation Link

© All rights reserved. U.S International Tech Support BBjOpenFileInfo Demonstration

© All rights reserved. U.S International Tech Support Extracted Record Demonstration

© All rights reserved. U.S International Tech Support IOLISTS ► IOLISTs - legacy style of input with drawbacks Code using IOLISTs is less legible and more difficult to maintain 0100 IOLIST A$,B[ALL],C$,D,IOL= IOLIST E$,F,G$ IOLISTs are significantly slower than string templates

© All rights reserved. U.S International Tech Support String Templates ► String templates – modern input style with advantages Describes a record in a file or SQL result set  Field name  Data type (character, numeric, etc.)  Fixed or variable length  Terminators, padding characters

© All rights reserved. U.S International Tech Support String Templates ► String templates (continued) Easy access to fields Required for SQL and SELECT verb access Significantly faster than IOLISTs Code is more legible and easier to maintain Can be retrieved via  SQL  GET TABLE INFO  Text area in VKEYED File

© All rights reserved. U.S International Tech Support Extended File Types ► XKEYED files ► JKEYED files ► VKEYED files ► ESQL Files

© All rights reserved. U.S International Tech Support XKEYED File Type ► BBj offers more file types XKEYED files  Unlimited number of keys  Unlimited number of key segments  Unlimited key length  Smaller than MKEYED files  Faster record iteration

© All rights reserved. U.S International Tech Support XKEYED Demonstration

© All rights reserved. U.S International Tech Support XKEYED Demonstration

© All rights reserved. U.S International Tech Support JKEYED File Type ► BBj offers more file types (continued) JKEYED Files (Journaled Files)  All file modifications are: ♦ Atomic – all operations completely succeed or completely fail ♦ Logged to automatically restore a potentially corrupt file to its last known good state

© All rights reserved. U.S International Tech Support JKEYED File Type ► BBj offers more file types (continued) JKEYED Files (Journaled Files)  Transaction Tracking ♦ Allows the programmer to define a set of operations on multiple files to be treated as a single operation ♦ Allows programmer to commit or rollback the entire operation

© All rights reserved. U.S International Tech Support JKEYED File Type ► BBj offers more file types (continued) JKEYED Files (Journaled Files)  True variable length records ♦ Perfect for BLOBs (Binary Large Objects) to store - Images - Audio - Video - Complete documents

© All rights reserved. U.S International Tech Support VKEYED File Type ► BBj offers more file types (continued) VKEYED Files  True variable length records ♦ Reduced disk usage ♦ Perfect for BLOBs (Binary Large Objects) to store - Images - Audio - Video - Complete documents

© All rights reserved. U.S International Tech Support VKEYED File Type ► BBj offers more file types (continued) VKEYED Files (continued)  Dynamic keys - add, remove, and change keys  Named keys - reduce maintenance coding  Text area - write string templates in the header

© All rights reserved. U.S International Tech Support VKEYED File Type ► BBj offers more file types (continued) VKEYED Files (continued) REM Create a VKEYED file REM 64 is the expected average record size erase p_file$,err=*next vkeyed p_file$,[1:1:6],[2:1:3],[3:1:2:"D"],0,64

© All rights reserved. U.S International Tech Support VKEYED Details Demonstration

© All rights reserved. U.S International Tech Support BBjFileInfo ► BBjFileInfo Object (continued) Special VKEYED functionality  Add keys  Remove keys  Change existing keys  Set key names  Set associated text

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types

© All rights reserved. U.S International Tech Support VKEYED File Size Demonstration

© All rights reserved. U.S International Tech Support VKEYED File Speed Consideration ► Disk Speed ► Network Speed ► File structure ► Differences measured in milliseconds

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types ► BBj offers more file types (continued) ESQL Files  Exclusively for SQL access; not a BBj file  Created via SQL ‘Create Table’ syntax ♦ Configured in the Database Properties section of the Enterprise Manager

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types ► BBj offers more file types (continued) ESQL File Features  Contains dictionary information in the file  Supports variable length records  Supports dynamic index creation  Offers true SQL data types ♦ Numeric values with a precision and scale ♦ Dates & Timestamps - Stored as a native type - No longer require mapping to a column extension

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types ► BBj offers more file types (continued) ESQL File Features (continued)  Optimizations ♦ Performance gains - Faster inserts - Faster data retrieval ♦ Able to read a single column instead of always reading a whole row - No longer byte array based

© All rights reserved. U.S International Tech Support BASIS DBMS – New File Types ► BBj offers more file types (continued) ESQL File Features (continued)  Future enhancement possibilities include ♦ Identity columns (auto increment) ♦ Column and row constraints - Foreign key relations - Not NULL constraint - Default values ♦ Optional Case-Sensitivity ♦ Support for advanced ALTER TABLE syntax

© All rights reserved. U.S International Tech Support ESQL Demonstration

© All rights reserved. U.S International Tech Support BBj File Type Comparisons

© All rights reserved. U.S International Tech Support DBMS Deployment Options ► Single-tier Thin Client Interpreter DBMS ► Two-tier Fat Client on different machines DMS on separate machine ► Three-tier Thin Client on different machines and the Interpreters running on the same machine with the DBMS Thin Client of different machines connecting to a centralized interpreter server that connects to a separate DBMS server

© All rights reserved. U.S International Tech Support DBMS Redundant Deployment Options ► Load-balanced interpreter servers connecting to: Storage area network SAN connected to RAID High-availability servers Highly Recoverable File System Journaled File System

© All rights reserved. U.S International Tech Support Summary ► BASIS DBMS Direct-result-set navigation and maintenance SQL-result-set navigation and maintenance ► New DBMS Objects BBjFileInfo BBjOpenFileInfo ► IOLISTS vs. Templates ► Extended File Types ► DBMS Deployment Options