Northern Mockingbird

Copyright © 2002 OSI Software, Inc. All rights reserved. PI OLE DB COM Connector Making Relational Databases Look Like PI Benny Gallardo

Outline Goals of the connector COM connectors vs. Interfaces OLE DB simplified Connector as a Translator Summary and announcements

Goals Access to relational data for all PI clients Expand the power & utility of PI clients –PI-ProcessBook –PI-DataLink –PI-ACE (Advanced Calculation Engine) –All current and future client tools

Interfaces put data into the PI archive Oracle SQL Server Problem: Redundancy of data Benefit: PI client access RdB Interface PI

A COM Connector is not an interface Data is transferred but not stored in PI No redundancy of data Oracle SQL Server OLE DB COM Connector PI

COM Connector Points COM Connector points have 3 special attributes –ctr_progid –ctr_strmap –ctr_lmap Key attributes for OLE DB points –ctr_udlpath –ctr_compath

OLE DB Data Source Data Consumer OLE DB Provider OLE DB - A Model for Data Transfer

Oracle OLE DB COM Connector Oracle Provider OLE DB - A Model for Data Transfer

1.Access the provider 2.Translate client requests OLE DB COM Translator Translate PI client requests into SQL RdB Provider PI & OLE DB Connector RdB PI Client

Accessing the OLE DB Provider ctr_udlpath OLE DB COM Connector OLE DB Provider.UDL File  Provider Name  User name  Password

Translating Client Requests All client requests represented as five simple SQL queries ctr_compath Text file contains 5 queries

Query #1 – Retrieve a value at time t 1 Time Value t1t1

Query #2 – Retrieve values between times t 1 time t 2 (inclusive) Time Value t1t1 t2t2

Query #3 – Retrieve value immediately preceding time t 1 Time Value t1t1

Query #4 – Retrieve value immediately following time t 2 Time Value t2t2

Query #5 – Retrieve most recent value Time Value

Query Structure Retrieve time, value, and status –raw SQL –stored procedures or functions Query optimization

Summary Goal: PI client access to relational data –DataLink, ProcessBook, & ACE COM Connectors vs. Interfaces –Redundancy of data OLE DB Connector point attributes –ctr_udlpath –ctr_compath Five fundamental SQL queries

Announcements The beta is available at The COM connector will be running in the demo room this afternoon with Oracle 9i, SQL Server 2000, and PI 3.3.