How to Setup Ingres to Work with Your...

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How to Setup Ingres to Work with Your Application

Cristian Ianculovici

Why Ingres Database?

Bells andWhistles

Enterprise

Developer

SmallBusiness

Closed Source Entry Level Closed Open Source

Total Cost of OwnershipExpensive Inexpensive

SybaseProgress

SQL Server

ORCL 10gIBM DB2Teradata

ExpressVersionsof closedsource

PostgresMySQL

INGRES

INGRES in DATAllegro

Applications and Database Connectivity

Ingres Database

Ingres Tools and Applications

There are various ways of classifying applications as far as the Ingres backend is concerned

Native Tools that are Ingres specific– Terminal Monitor, ABF, Embedded SQL, ICE– Visual SQL– OpenROAD

Standard (generic) Common tools that are used by different database systems– ODBC, JDBC, .NET– PHP, Python, Perl, Hibernate, Torque

Other classifications are based on:

Performance Complexity New development / Legacy

Choosing the right tools

This presentation is about how to connect existing or newly developed applications to Ingres

Agenda

Ingres Remote Connectivity Using ODBC JDBC Connectivity VB.NET The Python DBI Driver Ingres Native Tools – Terminal Monitor Embedded SQL OpenROAD Choosing the right tools

Ingres Remote Connectivity

Using V-nodes

V-node Connectivity

Connecting using the SQL utility (Terminal Monitor)

Using ODBC

Create an ODBC Data Source (DSN

Using ODBC – Ingres DSN

ODBC Connection – Excel Example

ODBC Connection – Code Example

MS Visual BasicDim con As ADODB.ConnectionDim rs As ADODB.RecordsetDim ConnStr As StringDim Query As String

Sub Main() Set con = New ADODB.Connection Set rs = New ADODB.Recordset ConnStr = "DSN=testdb" con.Open ConnStr

ODBC Connection – Code Example

MS Visual Basic (continued)

Query = "SELECT date('now')" Do While Not rs.EOF currentDBDateAndTime = rs(1) rs.MoveNext Loop rs.Close

JDBC / .NET

Ingres Database

JDBC / .NET

Ingres Database

JDBC ApplicationJDBC Driver

.NET Data Provider

.NET Application

JDBC / .NET

Ingres Database

Data Access Server

JDBC ApplicationJDBC Driver

.NET Data Provider

.NET Application

JDBC Connectivity

Code example

Class.forName("com.ingres.jdbc.IngresDriver");Connection con = DriverManager.getConnection( "jdbc:ingres://localhost:II7/testdb", "ingres", "*****");Statement st = con.createStatement();query = "INSERT INTO mydate VALUES(date('now'))";st.execute(query);st.close();

Other Standard Tools

The Ingres .NET Data Provider

Other Standard Tools (continued)

C#: public sealed class IngresCommand : System.Data.Common.DbCommand, IDbCommand,

IDisposable, ICloneable VB.NET: NotInheritable Public Class IngresCommand Inherits System.Data.Common.DbCommand Implements IDbCommand, IDisposable, ICloneable

IngresCommand Class Example IngresCommand cmd = new IngresCommand( “SELECT id, name FROM employee WHERE id = ?”);

The Python DBI Driverimport ingresdbi

dc=ingresdbi.connect(vnode="prod",database="testdb")c=dc.cursor()c.execute("select date('now')")for row in c.fetchall(): dt = row[0]print dtdc.commit()c.close()dc.close()

Ingres Native Tools – Terminal Monitor

Easiest to use– Just type the query, end it with \g <Enter> and see the

results of the query.

Ingres Native Tools – Terminal Monitor

Used for running scripts– Example.sql:INSERT INTO test_table (col1, col2) VALUES (‘abc’, 123);\g

To run: sql database_name < Example.sql– copydb generates files that are later executed using

this command.

Ingres Native Tools – Embedded SQL

C is the most common but there are packages for Pascal, Fortran, Cobol

It allows you to write SQL inside your program using your preferred programming language

Before going through the typical building steps, the program needs to be precompiled

Ingres Native Tools – Embedded SQL (continued)

#include <stdio.h>EXEC SQL INCLUDE SQLCA;EXEC SQL BEGIN DECLARE SECTION; /* database name */ static char dbname[20]; /* query output */ static char output[100]; /* error message */ static char errmsg[100];EXEC SQL END DECLARE SECTION;

main(){ strcpy(dbname,"testdb"); printf("Connecting to <%s> ... ", dbname); EXEC SQL WHENEVER SQLERROR CALL error; EXEC SQL CONNECT :dbname; printf("Done. \n"); EXEC SQL SELECT date('now') INTO :output; printf("Date/Time on the server is: %s\n",output);}

error(){ EXEC SQL WHENEVER SQLERROR CONTINUE; EXEC SQL INQUIRE_SQL(:errmsg = ERRORTEXT); printf("\nAn error has occured: \n%s\n",errmsg); exit(1);}

Precompile: esqlc myTest.sc Compile/link:

– Windowscl myTest.c /link ^ %II_SYSTEM%\ingres\lib\libingres.lib– UNIX (Linux)cc myTest.c -o myTest \$II_SYSTEM/ingres/lib/libingres.a -lm -lc –ldl \-lpthread

OpenROAD

Open Rapid Object Application Development Platform independent

How to connectThere are three modes:– No connectivity– Specify a database (named)– Connect to the current database

OpenROAD (continued)

Running the simple OpenROAD application

Other OpenROAD components

– Web deployment - eClient – OpenROAD Server – nTier Distribution– mClient - Mobile

The following need to be considered when choosing the tools

Complexity

Complexity Performance

Complexity Performance User interaction

Complexity Performance User interaction Legacy applications

ResourcesIngres Connectivity Guide

Embedded SQL Companion Guideingres.com

community.ingres.com

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