getting the most out of myodbc

8/8/2019 Getting the Most Out of MyODBC

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MySQL

Getting most out of

Connector/ODBC

Venu Anuganti

Developer, MySQL Inc

MySQL AB 2003


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MySQL AB 2003 | Venu Anuganti | www.mysql.comMySQL: Getting most out of Connector/ODBC

Presentation Goals

ODBC Overview

Fundamentals

Architecture

Connector/ODBC Installation

Connection Options

Supported and Unsupported Features

How to use with Microsoft Access

How to use with Open Office

How to use in the .NET environment

Migrating from other Databases

Current status and TODO


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Who are you?

How many of you ...

Already using the Connector/ODBC 3.51 ?

Still using the old MyODBC 2.50 ?

Going to use the ODBC solution in the near future orwith third party tools ?


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ODBC Overview

Open Data Base Connectivity (ODBC)

Maximum Interoperability Language-independent

Why was ODBC created ?

What is it actually ?


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ODBC and the Standard CLI

Call Level Interface (CLI)

X/Open CAE, Data Management - CLI

ISO/IEC, SQL/CLI


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ODBC Solution

Requirements Access Multiple DBMSs

using same source code without recompiling and relinking

Simultaneously Which DBMS features should ODBC expose ?

Common to all DBMSs

Any feature that is available in any DBMS

Solves

It is a Call Level Interface(CLI) Defines Standard SQL Grammar

Driver Manager -> simultaneous access to multiple DBMSs

Feature Set


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ODBC Architecture

Application

Driver Manager

Driver Driver Driver Driver

Data

Source

Data

Source

Data

Source

Data

Source

ODBC API

ODBC API


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Connector/ODBC

Connector/ODBC is a MySQL ODBC Driver

Also known as MyODBC

Conforms to ODBC 3.51 specification, level 1

(complete core API + level 2 features)

Works on all majorOperating Systems


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Basic Connector/ODBC Application Steps


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Installation

Windows

From Binary distribution

From Source

Unix

From Source

--with-mysql[-libs/includes]

--with-iodbc[..]--with-unixODBC[..]

From Binary distribution


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Data Source Name What is a Data Source Name (DSN) ?

Types

Machine Data Source

User Data Source System Data Source

File Data Source

What does Connector/ODBC DSN contain ?

Username (UID) Password (PWD) Server

Database Port Socket

Options Stmt DSN

Description


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Setting up a DSN on Windows

ODBC Data Source Administrator


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Setting up a DSN on Windows (cont ..)

Connector/ODBC 3.51 DSN Configuration Dialog


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Connector/ODBC Options

Connector/ODBC 3.51 Connection Options


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Connection Options

What is the need of them ?


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Bit Description

1 Returns the real width of a column.

2

Returns the true value of affected rows. If this flag is set

then MySQL returns 'found rows' instead. One must have

MySQL 3.21.14 or newer to get this to work.

4

Make a debug log in `c:\myodbc.log'(`/tmp/myodbc.log').

This is the same as putting

MYSQL_DEBUG=d:t:O,c::\myodbc.log in

`AUTOEXEC.BAT'

8 Don't set any packet limit for results and parameters.

16Don't prompt for questions even if driver would like to

prompt

32 Enable or disable the dynamic cursor support.


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64 Ignore use ofdatabase name in 'database.table.column'.

128 Force use of ODBC manager cursors (experimental).

256 Disable the use ofextended fetch (experimental).

512 Pad CHAR fields to full column length.

1024SQLDescribeCol() will return fully qualified column

names

2048 Use the compressed server/client protocol

4096

Tell server to ignore space after function name and before

'(' (needed by Power Builder). This will make all function

names keywords!

8192 Connect with named pipe


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16384

Change LONGLONG columns to INT columns (some

applications can't handle LONGLONG).

32768Return 'user' as Table_qualifier and Table_owner from

SQLTables (experimental)

65536Read parameters from the client and odbc groups from

`my.cnf'

131072Add some extra safety checks (should not bee needed

but...)

262144 Disable transactions

524288Enable query logging to `c:\myodbc.sql or

`/tmp/myodbc.sql' file - enabled only in debug mode


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1048576

Do not cache the results locally in the driver, instead

read from server (mysql_use_result). This works onlyfor forward-only cursors. This option is very important

in dealing with large tables when one doesn't want the

driver to cache the entire resultset.

2097152

Force the use of 'Forward-only' cursor type. In case of

applications setting the deafult static/dynamic cursor

type, and one wants driver to use non-cache resultsets,

then this option will ensure the forward-only cursor

behaviour.


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Test Data Source

Connector/ODBC 3.51 Test Data Source


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Configuring DSN on Unix

Using unixODBC-ODBCConfig

Using ODBC.INI direct editing


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Using ODBCConfig - UnixODBC

unixODBC ODBCConfig tool


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Using ODBCConfig - unixODBC

unixODBC ODBCConfig DSN Add (Driver Selection)


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Using ODBCConfig - unixODBC

unixODBC ODBCConfig DSN Add (Connector/ODBC setup)


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Configuring DSN on Unix (cont ..)

ODBC.INI

[myodbc3-test]

Driver = /usr/local/lib/libmyodbc3.so

Description = Connector/ODBC 3.51 Driver DSN

SERVER = localhost

PORT =

USER = root

Password =Database = test

OPTION = 3

SOCKET =

ODBCINI and ODBCSYSDIR


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Without Predefined DSN

Odbcinst.iniConnectionString =

DRIVER={MySQL ODBC 3.51 Driver}; \

SERVER=localhost; \

Port=3306; \

DATABASE=test; \

USER=venu; \

PASSWORD=venu; \

OPTION=3; \SOCKET=/tmp/mysql.sock; \

STMT=;\


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Remote Connection

Setup DSN with the server name pointing to the

hostname that you want to connect

Next GRANT the privileges for the user from which

he is connecting using GRANT

Grant *.* to user@hostname [IDENTIFIED BY passwod]..

Establish a connection


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Connector/ODBC with MS Access

Using MS Access as a Front end

Install Latest MDAC and Microsoft Jet

Alternatives

WinSQL (http://www.indussoft.com/)

Open Offfice (http://www.openoffice.org/)

Microsoft Visual Database Project


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Export/Import/Linking of tables from

Access What is a Linked Table ?

In the Database window click the name of the table or query you want to

export, and then on the File menu, click Export


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In the Export Object Type 'Object name' To dialog box, in the SaveAs Type

box, click ODBC Databases ()

Displays ODBC DSN Administrator

To IMPORT orLINK Table(s):

On the File menu, point to Get External Data, and then click Import/Link

Tables

In the files of type box, select ODBC Databases ()


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Issues with MS Access

Reasons for

#DELETED

Write conflict

Row cant be found for updating/deleting

Work around


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Connector/ODBC with OpenOffice

OpenOffice 1.1 Beta supports MySQL directly as an

built-in entity using ODBC layer.

Connector/ODBC recent versions are pre-tested byOpenOffice team before the releases

Platform independent tool to manage tables and its data

along with pass-through query execution

Difference between Microsoft Access and OpenOffice


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Using OpenOffice with Connector/ODBC

Install latest versions of

OpenOffice (1.1 Beta currently)

Connector/ODBC 3.51 Driver (3.51.06 currently)

MySQL Server (3.23.56)

Create Connector/ODBC DSN, myodbc3-test

Setup Connector/ODBC DSN, myodbc3-test within OpenOffice

Select Tools -> Data Sources options from the Main menu

Opens Data Source Administration, as shown below:


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OpenOffice Data Source Administration


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OpenOffice DSN Connector/ODBC setup


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OpenOffice Table(s) selection


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OpenOffice Working with Data Sources


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OpenOffice Table Management


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OpenOffice Table Management options


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Connector/ODBC with .NET

ODBC.NET Provider

Add-in component to the Microsoft.NET Framework

Directly accesses native ODBC drivers

Setup Microsoft .NET Framework SDK

MDAC 2.6 or later (2.7 is recommended)

ODBC.NET Provider (Microsoft.Data.Odbc name space)

Installed to C:\Program Files\Microsoft.NET\Odbc.Net


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ODBC.NET Architecture

ODBC.NET Application

ODBC.NET Provider

Driver Driver Connector/ODBC

Data

Source

Data

SourceMySQL

ODBC.NET API

ODBC API

MySQL C API


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Developing ODBC.NET Applications

OdbcCommand OdbcInfoMessageEventArgs

OdbcCommandBuilder OdbcParameter

OdbcConnection OdbcParameterCollection

OdbcDataAdapter OdbcPermission

OdbcDataReader OdbcPermissionAttribute

OdbcError OdbcRowUpdatedEventArgs

OdbcErrrorCollection OdbcRowUpdatingEventArgs

OdbcException OdbcTransaction

Main classes

Enumeration Type OdbcType

Ref: ODBC.NET Data Provider Reference Document


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Developing ODBC.NET Applications (cont ..)

First, import the ODBC.NET namespace

Imports Microsoft.Data.Odbc ( VB.net )

using Microsoft.Data.Odbc (C# )

Connect to MySQL server by loading Connector/ODBC

String myconStr= DSN=myodbc3-test;

OdbcConnection myOdbcCon= new OdbcConnection(myConStr)

myOdbcCon.open()

Complete article on Exploring MySQL in the .NET

environment can be found from here:

http://www.mysql.com/articles/dotnet


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Migrating

MS Access

MS Data Transformation Services (DTS)

Export to plain SQL


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Products that works with Connector/ODBC

All noted ODBC compliant Tools and Applications

MS Access OpenOffice Delphi

CTD ColdFusion Crystal Reports

Erwin MS Office tools FileMaker Pro

FoxPro Notes 4.5/4.6 MS Visio Enterprise

Vision Visual Objects Visual Interdev

Perl DBD-ODBC ParaDox PowerBuilder

PowerDesigner ODBC.NET SQLExpress

StarOffice Samba Server .


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ODBC Programming Hints

Direct linking with the driver will drastically increase the

performance by a factor of ~40-50%

Do not use the debug version of the driver DLL

Turn off all ODBC and Connector/ODBC loggers

Avoid using ODBC API calls that works on prepared

results instead use it on execute call


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Connector/ODBC 3.52

ODBC Specification 3.51/3.52

MySQL 4.1 Binary Protocol compatible

UnicodeAPIs

Descriptors

Array ParameterHandling

Performance

Existing majorbugs ( if any ) from 3.51

Alpha release


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Questions ?

Mailing list:

[email protected]

List Archives:

http://lists.mysql.com/

Frequently Asked Questions

http://www.mysql.com/products/myodbc/faq_toc.html

Programmers Reference Manual

http://www.mysql.com/products/myodbc/manual_toc.html

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