ViaSQL

Technical Overview

Viaserv, Inc. 2

ViaSQL Support for S/390

Originally a VSE product OS/390 version released in 1999 Identical features and functions Same workstation, LAN, server, etc. environments

and tools

Viaserv, Inc. 3

Two ViaSQL Offerings

ViaSQL Direct– entry-level– two-tier -- simpler system– web-oriented

ViaSQL Integrator– three-tier -- adds ViaSQL Gateway– supports transfer, CICS clients, RPCs– more configuration and administration options

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ViaSQL Direct

OS/390

CICS

Legacy Data Server

DB2

VSAM

IMS

Seq.

RSP

Other

ViaSQL Direct

ODBC or JDBC Driver

WebServer

Browser

ViaSQL Direct

ODBC or JDBC Driver

ViaSQLAccess Server

ODBC or JDBCTool

APPC (SNA, LU6.2)

TCP/IP TCP/IP

APPCWeb

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ViaSQL Direct Clients

ODBC v3.5– 32-bit Windows clients (95, 98, NT, 2000)

JDBC v1.0– Java 1.1 and Java 2 platforms– Type 4 driver (written completely in Java)

• runs on Java virtual machines on any platform (OS/390, Windows NT/2000, UNIX)

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ViaSQL Direct Data Sources

Dynamic SQL access to DB2– SELECT, INSERT, UPDATE, DELETE– GRANT/REVOKE/etc.

Programmatic access through RSPs– all data sources accessible from CICS region

Dynamic SQL access via Legacy Data Server– VSAM, IMS, sequential (Datacom coming soon)

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ViaSQL Direct Functions

Execute any SQL allowed by site– SELECT results returned as relational result sets in ODBC

datatypes Execute any Remote Stored Procedure (RSP)

– may return result sets or messages MS-SQL Server 7 Linked Server connection

– Remote Procedure call (rpc): SQL, RSP (no Transfer)– Distributed Queries– Passthrough queries (Openquery method)– Data Transformation Services (DTS)

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Remote Stored Procedures (RSPs) Customer-written CICS program called by the ViaSQL

Access Server Uses

– business logic– data access logic– static access to DB2– access to data sources not supported by Legacy Data Server

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ViaSQL Direct Uses

Simple desktop access Simple laptop access Web / Application Server access MS SQL Server 7 access / integration

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Web Architectures — LAN

OS/390

CICS

Legacy Data Server

DB2

VSAM

IMS

Seq.

RSP

Other

WebServer

Browser

ViaSQL Direct

ODBC or JDBC Driver

ViaSQLAccess ServerTCP/IP

APPCWeb

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Web Architectures — OS/390

OS/390

CICS

Legacy Data Server

DB2

VSAM

IMS

Seq.

RSP

Other

Browser

IBM WebSphereApplication

Server

ViaSQL Direct

JDBC Driver

ViaSQLAccess Server

Web

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ViaSQL Integrator

OS/390

CICS

Legacy Data Server

DB2

VSAM

IMS

Seq.

RSP

Other

Browser

WebServer

Viaserv ODBC Driver

ViaSQLAccess ServerTCP/IP

APPC

Web

Viaserv ODBC Driver

ODBC Tool

Open Client

ViaSQL Gateway

Open Server

Windows NT/2000

Open ClientTool

Open Client

Standard Network Connectivity

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ViaSQL Integrator Clients

ODBC– uses Viaserv ODBC driver (not ViaSQL Direct ODBC Driver)– 32-bit Windows clients (95, 98, NT, 2000)– ODBC v3.5– requires underlying Open Client installation (converts ODBC to

Open Client) Open Client v.10.4 and later

– v.11.1.1 recommended– shipped with ViaSQL Integrator on Gateway CD

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ViaSQL Integrator Data Sources

Dynamic SQL access to DB2– SELECT, INSERT, UPDATE, DELETE– GRANT/REVOKE/etc.

Programmatic access through RSPs– all data sources accessible from CICS region

Dynamic SQL access via Legacy Data Server– VSAM, IMS, sequential (Datacom coming soon)

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ViaSQL Integrator Functions

Execute any SQL allowed by site– SELECT results returned as relational result sets in ODBC

or Open Client datatypes Execute any RSPs Transfers Client Services Applications (CSAs)

– CICS client access to LAN databases Sybase ASE / MS SQL Server 7 integration

– Distributed queries (ASE 11.5 or later)– Remote Procedure call (rpc): SQL, RSP, Transfer

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The ViaSQL Transfer

Move data between OS/390 and a LAN database– Sybase, MS SQL Server, Oracle, ODBC– either direction– one-step data extraction, movement, format, load

Useful for data staging, reporting databases, data warehousing, data migration

ViaTransit utility– transfer building– transfer scheduling and automatic execution– pre- and post-transfer processing

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Client Services Applications (CSAs) CICS client access to LAN database

– Sybase, MS SQL Server, Oracle, ODBC– execute SQL or stored procedure– results returned to CICS program– useful for data synchronization

CICS client access to ViaSQL Gateway– execute a transfer– useful for distributed sites with host-managed systems

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Remote Procedure Calls (RPCs)

DBMS client access to OS/390– MS SQL Server (linked server connection)

• Uses ODBC connection (ViaSQL Direct or ViaSQL Integrator)– Sybase server to server connection

• Uses ODBC connection to ViaSQL Gateway (ViaSQL Integrator)– Oracle (Java or external procedure)

Application options– User perspective - single data source (transparent access)– Dynamic SQL or Stored procedures / Triggers

Useful for data synchronization

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Hybrid Environments

ViaSQL Direct components shipped with ViaSQL Integrator

Hybrid environments supported– single ViaSQL Access Server transaction supports access from

both ViaSQL Direct ODBC Driver and ViaSQL Gateway– Legacy Data Server and RSPs never know

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The ViaSQL Configurator — 1Required ComponentsFunction ViaSQL SystemOS/390 Server Administrator

WorkstationClient

ViaSQL Direct ViaSQL Access Server ViaSQL Direct ODBC DriverViaSQL Direct JDBC Driver

Dynamic SQL access to DB2

ViaSQL Integrator ViaSQL Access Server ViaSQL Gateway Open ClientViaserv ODBC Driver (optional)

ViaSQL Direct ViaSQL Access ServerLegacy Data Server

Legacy DataManager

ViaSQL Direct ODBC DriverViaSQL Direct JDBC Driver

Dynamic SQL access to VSAM orsequential data

ViaSQL Integrator ViaSQL Access ServerLegacy Data Server

ViaSQL Gateway Legacy DataManager

Open ClientViaserv ODBC Driver (optional)

ViaSQL Direct ViaSQL Access ServerLegacy Data ServerIMS Interface

Legacy DataManager

ViaSQL Direct ODBC DriverViaSQL Direct JDBC Driver

Dynamic SQL access to IMS

ViaSQL Integrator ViaSQL Access ServerLegacy Data ServerIMS Interface

ViaSQL Gateway Legacy DataManager

Open ClientViaserv ODBC Driver (optional)

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Required ComponentsFunction ViaSQLSystem OS/390 Server Administrator

WorkstationClient

ViaSQL Direct ViaSQL Access Server ViaSQL Direct ODBC DriverViaSQL Direct JDBC Driver

Programmatic access (RSP) to allOS/390 data sources

ViaSQL Integrator ViaSQL Access Server ViaSQL Gateway Open ClientViaserv ODBC Driver(optional)

Transfer ViaSQL Integrator ViaSQL Access Server ViaSQL Gateway

Automated transfer preparationand execution

ViaSQL Integrator ViaSQL Access Server ViaSQL GatewayViaTransit TransferServer

ViaTransit TransferManager

OS/390 client access (CSA) toLAN

ViaSQL Integrator ViaSQL Access Server ViaSQL CSA Server

The ViaSQL Configurator — 2