IBM Informix Developer's Handbook - IBM Redbooks

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server: demo_on username: informix password: password # Warning: The database defined as 'test' will be erased and # re-generated from your development database when you run 'rake'. # Do not set this db to the same as development or production. test: adapter: mysql database: stores7 username: root password: host: localhost production: adapter: informix database: stores7 pool: 5 timeout: 5000 server: demo_on username: informix password: password C:\work\stores7\config> Rails Adapter for IBM Data Server The Rails Adapter for the IBM Data Server Ruby driver is bundled with the Ruby driver. It is installed when the Ruby driver is installed. In the same way as with the Ruby Informix Rails Adapter, if the Rails Adapter for IBM Data Server is installed on a version of Rails older than 2.x, the adapter script (informix_adapter.rb) must be copied in the connection_adapter directory, and the RAILS_CONNECTION_ADAPTER parameter in the active_record.rb Ruby script has to be updated. The database configuration file for a Rails project, database.yml, has to be updated with the details for the Informix server. Example 11-10 shows a database.yml file that is used in a Rails project that connects to an IBM Informix database. Example 11-10 The database.yml file for the Rails Adapter for IBM Data Servers C:\work\stores7\config>type database.yml development: adapter: ibm_db 372 IBM Informix Developer’s Handbook
database: stores7 pool: 5 timeout: 5000 host: kodiak port: 9089 username: informix password: password # Warning: The database defined as 'test' will be erased and # re-generated from your development database when you run 'rake'. # Do not set this db to the same as development or production. test: adapter: mysql database: stores7 username: root password: host: localhost C:\work\stores7\config> The adapter parameter is set to the reference name of the Data Server Ruby driver ibm_db. It also contains the host name and the port parameter with the details about the DRDA Informix instance. These details are the same as used in the Data Server driver for ODBC/CLI. For a list of all the parameters, refer to: http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/topic/com.ibm.swg.im.dbcli ent.ruby.doc/doc/t0052780.html 11.3 Database operations This section provides examples of using both Ruby drivers to perform basic operations against an IBM Informix database server. It also demonstrates how to use the Rails Adapter to create basic web applications. Chapter 11. Working with Ruby on Rails 373
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IBM Informix Developer’s Handbook
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Note: Before using this information
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3.2 Setup and configuration . . . .
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8.3.1 Connecting to the database .
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12.5.2 Compiling the wrapper code .
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Trademarks IBM, the IBM logo, and i
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Krishna Doddi (also known as Prasad
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Comments welcome Your comments are
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1.1 Server options There are a numb
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This edition offers the following a
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either an HDR secondary or RSS seco
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There are three edition options for
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functions. An application calls the
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The IBM Data Server Driver for JDBC
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OLEDB Microsoft OLE DB is a specifi
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The DataBlade Developers Kit provid
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1.3.1 Architecture overview An unde
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Physical and logical logging As eac
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Before you select an API or library
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Hidden, behind-the- scenes tasking
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2.1 Server setup In this section, w
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A typical sqlhosts file contains th
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Figure 2-1 shows the Server Informa
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with the existing Informix instance
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2.2 Client setup ► Edit the Infor
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Figure 2-4 illustrates the options
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2. Prepare the environment. You nee
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5. If you selected a Custom install
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At this stage, the Client SDK insta
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You can download some of these comp
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46 IBM Informix Developer’s Handb
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2. On the Software License Agreemen
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5. Verify the installation selectio
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3. Extract the IBM Data Server Driv
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For a silent installation on both W
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Configuring the JDBC driver To use
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3.1 ODBC and Informix ODBC is a sof
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► IBM Informix ODBC Driver (64-bi
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You can set optional configuration
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Parameter Description Insert Cursor
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Table 3-5 shows the ODBC libraries
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Keyword Description DriverODBCVer S
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Keyword Description DESCRIBEDECIMAL
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If there is no database alias defin
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Example 3-5 shows a simple db2cli.i
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The application sends SQL request t
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} 78 IBM Informix Developer’s Han
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SQLSMALLINT DecimalDigits, /* ibSca
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If your application requires only S
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} SQLCHAR sname[15+1]; SQLLEN lcode
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fprintf (stdout, "Connected\n"); 88
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SQLAllocHandle (SQL_HANDLE_ENV, SQL
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SQLAllocHandle (SQL_HANDLE_ENV, SQL
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contains the data or special attrib
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Function Description ifx_lo_specset
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SQLSMALLINT lospec_size; SQLINTEGER
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4. Call ifx_lo_open() to open the s
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SQLBindParameter (hstmt, 1, SQL_PAR
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} SQLFreeHandle (SQL_HANDLE_ENV, he
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SQLCHAR*insertStmt = (SQLCHAR *) "I
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Accessing a complex data type Examp
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C:\work> 3.3.5 Error handling Ludwi
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C:\work>connect_error demo_on;UID=w
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We create a function called CheckDi
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Figure 3-14 shows the Tracing tab.
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Example 3-36 demonstrates how to se
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DRDADEBUG All IBM Data Server drive
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124 IBM Informix Developer’s Hand
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4.1 Informix ESQL/C Informix ESQL/C
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Example 4-1 shows a simple sqlhosts
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Compiling ESQL/C programs The esql
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Platform Environment variable Linux
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Example 4-3 shows a statement that
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:fname[i], :lname[i], :company[i],
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The SELECT statement shown in Examp
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EXEC SQL fetch ex_cursor into :n1,:
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Table 4-3 lists a few ESQL/C data t
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the sbspace in the server before yo
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Example 4-10 shows the ESQL/C comma
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Example 4-12 shows the output of Ex
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} EXEC SQL END DECLARE SECTION; 150
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C->S (16) Time: 2010-07-06 20:21:58
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5.1 JDBC drivers for an Informix da
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5.1.2 IBM Data Server Driver for JD
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Example 5-4 shows the CLASSPATH env
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Example 5-6 shows the compile line
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programmer uses Java data types to
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Example 5-9 shows the syntax of the
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" Connected to Informix Dynamic Ser
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5.4.2 Manipulating data In this sec
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conn.close(); } catch ( Exception e
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Example 5-15 demonstrates how to di
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conn = DriverManager.getConnection(
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con.setAutoCommit(false); Statement
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System.out.format("Last row: \t%d,"
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PreparedStatement pstmt=conn.prepar
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System.err.println(e); } } } Exampl
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Issuer: CN=bedfont.uk.ibm.com, O=ib
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5.6.1 Class not found errors The fo
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5.7.2 IBM Data Server Driver for JD
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6.1 Hibernate for Java This section
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A Hibernate application includes th
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6.2.2 Configuration File Descriptio
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Example 6-3 shows a hibernate.cfg.x
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name="State" table="States">
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Example 6-6 shows the CLASSPATH var
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informix password org.hibernate
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Example 6-11 shows basic Java code
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The only difference between the loa
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1, AZ, Arizona 2, CA, California C:
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Example 6-19 shows the output of th
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private Long id; private String cod
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7.1 IBM Informix OLE DB Provider In
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through COM. You can use it to test
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7.3.1 Supported interfaces An OLE D
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7.3.3 Type mapping Keyword Descript
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7.3.4 Cursors Informix OLE DB Provi
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Example 7-3 demonstrates how to con
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Connect to the Database Server CHEC
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#define CHECK(hr) if (((HRESULT)(hr
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} 232 IBM Informix Developer’s Ha
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if(lDataLength > 0) { // Call GetCh
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_bstr_t bstrPassWord = "password";
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Provider with some of the available
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cx.connectionstring = "Data Source=
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California 0.08250 c:\work> 7.4.3 S
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The user ID for the Informix databa
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happen that the 32-bit provider is
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7.5.2 Tracing Failure when handling
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A44: 53C Exit Object Address: 0x032
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8.1 Informix and .NET data provider
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Both providers have the same assemb
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Example 8-3 shows how to compile an
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Attribute Description Default Exclu
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The majority of the connection stri
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Data Server Provider for .NET type
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Example 8-7 shows the output of Exa
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Table 8-9 lists the methods that th
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Method Description IfxMonthSpan Get
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} } int drows=0; 272 IBM Informix D
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Example 8-16 shows the output of Ex
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Method Description Int64 Seek(offse
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... 280 IBM Informix Developer’s
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IfxConnection conn; IfxClob vclob;
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Property Type Description Year Int3
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Hour : 8 Minute: 20 C:\work>c Arith
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Method Description Compare(IfxDec1,
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C:\work>decimal Value Sales Tax : 0
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Ceiling Sales Tax : 1.0 Negative Sa
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Visual Studio Add-In provides tools
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9.1 Informix and PHP extensions The
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- Console mode Enter one of the fol
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9.2.4 Verifying connectivity You ca
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► Secure Although PHP is open sou
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*--- persistent connect trusted use
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In a web application, the input dat
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Dynamic SQL statements Dynamic SQL
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$stmt->bindValue(':p9', $_POST["pho
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*--- Verification ---*/ $stmt1=$dbc
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$row=$stmt1->fetch(PDO::FETCH_ASSOC
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} /*--- Get the BLOB from the datab
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In Example 9-17 on page 316, the da
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Function Description db2_bind_param
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Page 346 and 347: 10.1 An overview of UDRs and databa
Page 348 and 349: 10.1.2 About UDRs specific examples
Page 350 and 351: Invoking a UDR You can invoke a UDR
Page 352 and 353: 10.2 Developing UDRs To develop a U
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Page 356 and 357: 10.2.2 UDRs in Java 5 1005 6 1006 7
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Page 370 and 371: Installing the DataBlade Any DataBl
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Page 378 and 379: 11.1 A brief overview of Ruby on Ra
Page 380 and 381: The following drivers allow Ruby to
Page 382 and 383: Data types The Ruby Informix driver
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Page 386 and 387: The Rails Adapter can be installed
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Page 394 and 395: Example 11-17 shows how to select a
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Page 400 and 401: 11.4 Using the Rails Adapter with R
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Page 406 and 407: Figure 11-1 shows the Listing items
Page 408 and 409: 11.5.1 Creating the Rails applicati
Page 410 and 411: 11.5.4 Migrating the model Ruby on
Page 412 and 413: 11.5.5 Starting the Rails web serve
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Page 416 and 417: 12.1 Basic concepts In this section
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Page 422 and 423: 12.3.2 The w4gl utility For additio
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Page 428 and 429: Example 12-8 shows the APP SERVER f
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The compressed file is left in the
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Figure 12-3 shows the WSDL informat
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| Target Directory [/work/publish ]
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After this process is complete, the
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while using one of the I4GL web ser
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Keeping the wrapper C files in the
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12.6.2 Tracing A developer can use
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13.1 Concurrency and locking 13.1.1
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13.1.2 Lock duration The length of
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If a table is not created with row
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How the database server manages byt
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13.2.1 Deadlocks reader can read a
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ow that has not been committed (thi
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should check with the DBA to determ
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Note: For information about writing
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The amount of memory storage per lo
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The DIRECTIVES parameter The DIRECT
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13.5 Working with your database adm
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► Metadata updates affect logging
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Guidelines for setting VPCLASS: ►
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The lock level is determined by the
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area of specific interest. The func
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B.1 Distributed transactions A tran
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* Compile with: * on UNIX systems:
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} { printf("XA_PREPARE failed with
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When using distributed transactions
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Online resources ► IBM Informix D
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cast function 332 cast support func
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IfxDecimal public method 287 ifxdot
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jvpjavavm 341 jvplog 347 jvplogfile
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sql_longvarbinary 80, 96 sql_longva
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IBM Informix Developer’s Handbook
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