IBM Informix Developer's Handbook - IBM Redbooks

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2.2 Client setup ► Edit the Informix Server configuration file located in the etc directory of your Informix Server directory to include the new database definition as an alias for the existing Informix Server. You can use the environment variables to access this file, for example $INFORMIXDIR/etc/$ONCONFIG. This file is the file that contains a list of configuration parameters for Informix Server. Example 2-3 shows the configuration file that we used in our database server. Example 2-3 Linux onconfig file sample informix@irk:/usr3/11.50$ grep DBSERV $INFORMIXDIR/etc/$ONCONFIG # DBSERVERNAME - The name of the default database server # DBSERVERALIASES - The list of up to 32 alternative UDRs, # DBSERVERNAME or DBSERVERALIASES that uses a DBSERVERNAME demo_my DBSERVERALIASES demo_my_drda You must restart Informix Server for these changes to take effect. You can find additional information about the sqlhosts file at: http://publib.boulder.ibm.com/infocenter/idshelp/v115/topic/com.ibm.admin.doc/i ds_admin_0158.htm Informix is a low-administration, easy-to-use, and embeddable database that supports various application development languages and technologies, such as Java, .NET, PHP, and Web Services. Informix can handle XML data easily and can be extended to handle new data sets using DataBlades. In this section, we describe how to install and configure Informix Client products to support the application development that you need. 2.2.1 Informix Client options IBM offers the following Informix Client products that you can use to develop and use an IBM Informix database server: ► IBM Informix Client Software Development Kit (Client SDK) includes several APIs that are designed for developing with an Informix database. ► IBM Informix Connect is a runtime version of Client SDK. 34 IBM Informix Developer’s Handbook
► IBM Informix JDBC Driver is Java driver that is optimized for Informix databases. ► IBM Data Server Client includes the API tools that are needed for development with IBM databases such as DB2 and Informix, plus functionality for database administration and client/server configuration. ► IBM Data Server Runtime Client is the runtime version of the IBM Data Server Client. ► IBM Data Server Driver Package is a lightweight version of the IBM Data Server Runtime that includes only the interfaces and drivers. ► IBM Data Server Driver for JDBC and SQLJ is a Java driver for IBM Data Servers. Client SDK and Informix Connect have distinct functions: ► Client SDK contains a group of application-programming interfaces (APIs) that developers can use to write applications for Informix, plus other client components. Client SDK must be installed on computers that application programmers will use to write applications. ► Informix Connect contains runtime libraries of the Client SDK APIs, plus other client components. Install Informix Connect on computers that users use to connect to Informix database servers. The same rule applies to IBM Data Server products. Do not use packages that are designed for development, such as IBM Data Server Client, to deploy an application. Some components, such as Informix JDBC Driver, do not have a specific runtime version, so you can use the same product in both cases. In addition to these products, you can use open source drivers, such as PHP or Ruby, to develop with an IBM Informix database. Chapter 2. Setting up an Informix development environment 35
Page 1: IBM Informix Developer’s Handbook
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
Page 32 and 33: The DataBlade Developers Kit provid
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 42 and 43: 2.1 Server setup In this section, w
Page 44 and 45: A typical sqlhosts file contains th
Page 46 and 47: Figure 2-1 shows the Server Informa
Page 48 and 49: with the existing Informix instance
Page 52 and 53: Figure 2-4 illustrates the options
Page 54 and 55: 2. Prepare the environment. You nee
Page 56 and 57: 5. If you selected a Custom install
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
Page 68 and 69: 3. Extract the IBM Data Server Driv
Page 70 and 71: For a silent installation on both W
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
Page 92 and 93: The application sends SQL request t
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Page 96 and 97: SQLSMALLINT DecimalDigits, /* ibSca
Page 98 and 99: 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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