IBM Informix Developer's Handbook - IBM Redbooks

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2.1 Server setup In this section, we describe the various methods of installing Informix Server. We discuss how you can plan for the installation depending upon your specific requirement. We focus the discussion on the configuration that is required at the database server side to enable Informix Client connectivity. 2.1.1 Planning for the installation In general, an application developer is not involved in the Informix Server product planning and installation. However, you need to communicate the application requirements to the DBA, who plans, installs, and configures the Informix database server for you. For example, the DBA needs to know if you need a smart blob space or a reduced footprint of the server or DataBlades. The Informix installer provides options to install only a small footprint of the server where you can add or remove the features as needed. For more information about DataBlades, see 10.3, “DataBlades and bladelets” on page 352. 2.1.2 Installing Informix Server IBM provides the Informix Server editions, described in 1.1, “Server options” on page 2, in .zip, .tar, or .dmg format, depending on the platform on which Informix Server is installed. You can install Informix Server using several methods. The common installation methods include using the console, a GUI, or silent mode. Because we focus on Informix Client products for application development in this book, we describe only the silent mode of Informix Server installation on a UNIX platform. For other methods and platforms, refer to the individual installation PDF file that comes with the product. To perform a silent installation on UNIX, use the following steps: 1. Extract the compressed .tar file into any directory using the following command: tar -xvpf IIF.11.50.tar 26 IBM Informix Developer’s Handbook
2. Create the installation .ini file that specifies the installation options. You can use the sample installation .ini file, server.ini, as a template. The server.ini file is located in the directory that is used to extract the server media package. Edit the following information in the server.ini file, and save the file with a new name, for example myserver.ini: – Change -P installLocation="/opt/IBM/informix" to the location of directory where you want to install the product. – Change -G licenseAccepted= option to true to accept the software license. Otherwise, the installation process stops: 3. Start the silent installation with the following command: ./ids_install -silent -options myserver.ini Performing these steps installs Informix Server in your specified directory along with a demonstration instance by the name demo_on. For more information about Informix installation and creating new instances, refer to the installation guide PDF that comes with the media file. 2.1.3 Configuring Informix Server The connectivity information allows a client application to connect to any IBM Informix database server in the network. The connectivity data for a particular database server includes the following connectivity data and information is required: ► The host name of the computer or node on which the database server runs ► The type of connection that an application can use to connect to the server ► The service name or port number used by the database server ► The database instance (also called the database server name) Even if the client application and the database server are on the same computer or node, you might need to specify connectivity information for your client application. Connectivity on UNIX On UNIX, the sqlhosts file contains the connectivity information. By default, this file resides in the $INFORMIXDIR/etc directory. You can use the INFORMIXSQLHOSTS environment variable to specify an alternative location for the connectivity information. Edit this file according to the protocol that you are using or the port number to which your client application will connect. Chapter 2. Setting up an Informix development environment 27
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Page 4 and 5: Note: Before using this information
Page 6 and 7: 3.2 Setup and configuration . . . .
Page 8 and 9: 8.3.1 Connecting to the database .
Page 10 and 11: 12.5.2 Compiling the wrapper code .
Page 12 and 13: Trademarks IBM, the IBM logo, and i
Page 14 and 15: Krishna Doddi (also known as Prasad
Page 16 and 17: Comments welcome Your comments are
Page 18 and 19: 1.1 Server options There are a numb
Page 20 and 21: This edition offers the following a
Page 22 and 23: either an HDR secondary or RSS seco
Page 24 and 25: There are three edition options for
Page 26 and 27: functions. An application calls the
Page 28 and 29: The IBM Data Server Driver for JDBC
Page 30 and 31: OLEDB Microsoft OLE DB is a specifi
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Page 34 and 35: 1.3.1 Architecture overview An unde
Page 36 and 37: Physical and logical logging As eac
Page 38 and 39: Before you select an API or library
Page 40 and 41: Hidden, behind-the- scenes tasking
Page 44 and 45: A typical sqlhosts file contains th
Page 46 and 47: Figure 2-1 shows the Server Informa
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Page 50 and 51: 2.2 Client setup ► Edit the Infor
Page 52 and 53: Figure 2-4 illustrates the options
Page 54 and 55: 2. Prepare the environment. You nee
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Page 58 and 59: At this stage, the Client SDK insta
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Page 64 and 65: 2. On the Software License Agreemen
Page 66 and 67: 5. Verify the installation selectio
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Page 72 and 73: Configuring the JDBC driver To use
Page 74 and 75: 3.1 ODBC and Informix ODBC is a sof
Page 76 and 77: ► IBM Informix ODBC Driver (64-bi
Page 78 and 79: You can set optional configuration
Page 80 and 81: Parameter Description Insert Cursor
Page 82 and 83: Table 3-5 shows the ODBC libraries
Page 84 and 85: Keyword Description DriverODBCVer S
Page 86 and 87: Keyword Description DESCRIBEDECIMAL
Page 88 and 89: If there is no database alias defin
Page 90 and 91: 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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84 IBM Informix Developer’s Handb
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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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94 IBM Informix Developer’s Handb
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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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The IBM_DB2 extension This PHP exte
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9.3.5 Exception handling Error hand
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The error information that is gener
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9.3.6 Troubleshooting printf("NonCr
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10.1 An overview of UDRs and databa
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10.1.2 About UDRs specific examples
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Invoking a UDR You can invoke a UDR
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10.2 Developing UDRs To develop a U
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One variable in, one result out For
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10.2.2 UDRs in Java 5 1005 6 1006 7
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Note: The paths for .jar files that
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We use the following procedure to c
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For our example, JVPCLASSPATH is se
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10.2.3 UDRs in C and break somethin
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3. Set the bld file permissions as
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4. Create the function in dbaccess.
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Installing the DataBlade Any DataBl
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To connect to a database, run one o
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IBM Informix DataBlade module name
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interface, called BladeSmith, allow
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11.1 A brief overview of Ruby on Ra
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The following drivers allow Ruby to
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Data types The Ruby Informix driver
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03/07/2010 17:30 1,088 LICENSE 03/0
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The Rails Adapter can be installed
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server: demo_on username: informix
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Using Ruby Informix driver In this
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If the SQL statement returns only o
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Example 11-17 shows how to select a
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Example 11-19 shows a simple Ruby s
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# create a prepare object stmt = IB
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11.4 Using the Rails Adapter with R
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For more information, refer to: htt
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Figure 11-1 shows the Listing items
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11.5.1 Creating the Rails applicati
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11.5.4 Migrating the model Ruby on
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11.5.5 Starting the Rails web serve
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12.1 Basic concepts In this section
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A web service can perform the follo
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Example 12-1 shows a typical shell
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12.3.2 The w4gl utility For additio
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Parameter Description ws_func Funct
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In the remaining sections, we descr
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Example 12-8 shows the APP SERVER f
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Add details about the web service Y
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Source file information Finally, yo
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The Generate operation creates the
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process, running each individual st
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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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