IBM Informix Developer's Handbook - IBM Redbooks

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3.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 3.2.1 IBM Informix ODBC Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 3.2.2 IBM Data Server Driver for ODBC and CLI. . . . . . . . . . . . . . . . . . . . 70 3.2.3 Verifying connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 3.3 Developing an ODBC application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 3.3.1 Connecting to the database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 3.3.2 Type mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 3.3.3 Performing database operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 3.3.4 Handling special data types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 3.3.5 Error handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 3.3.6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Chapter 4. Working with ESQL/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 4.1 Informix ESQL/C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 4.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 4.3 Windows system configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 4.4 Developing an ESQL/C application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 4.4.1 Creating an ESQL/C application . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 4.4.2 Performing database operations . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 4.4.3 Data types mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 4.4.4 Handling special data types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 4.4.5 Exception handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 4.4.6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Chapter 5. Working with the JDBC drivers . . . . . . . . . . . . . . . . . . . . . . . . 153 5.1 JDBC drivers for an Informix database . . . . . . . . . . . . . . . . . . . . . . . . . . 154 5.1.1 IBM Informix JDBC Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 5.1.2 IBM Data Server Driver for JDBC and SQLJ . . . . . . . . . . . . . . . . . 156 5.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 5.2.1 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 5.2.2 Verify connectivity with Informix JDBC Driver . . . . . . . . . . . . . . . . . 158 5.2.3 Verify connectivity with the Data Server Driver . . . . . . . . . . . . . . . . 160 5.3 JDBC type mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 5.4 Performing database operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 5.4.1 Connection to the database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 5.4.2 Manipulating data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 5.5 Informix additional features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 5.5.1 Batch inserts or updates and using ResultSet metadata . . . . . . . . 175 5.5.2 BIGSERIAL data type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 5.5.3 Informix smart large objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 5.5.4 Secure Socket Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182 5.6 Typical errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 5.6.1 Class not found errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 iv IBM Informix Developer’s Handbook
5.6.2 Connectivity errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 5.6.3 Syntax errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5.7 Tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5.7.1 IBM Informix JDBC Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 5.7.2 IBM Data Server Driver for JDBC . . . . . . . . . . . . . . . . . . . . . . . . . . 188 Chapter 6. IBM Informix with Hibernate . . . . . . . . . . . . . . . . . . . . . . . . . . 189 6.1 Hibernate for Java . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 6.1.1 Overview of Hibernate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 6.1.2 Hibernate concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 6.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 6.2.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 6.2.2 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194 6.3 Using Hibernate with an Informix database. . . . . . . . . . . . . . . . . . . . . . . 198 6.3.1 Components of a Hibernate application . . . . . . . . . . . . . . . . . . . . . 198 6.3.2 Working with a Hibernate object . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 6.3.3 Using annotations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 Chapter 7. Working with IBM Informix OLE DB Provider. . . . . . . . . . . . . 215 7.1 IBM Informix OLE DB Provider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 7.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 7.2.1 Installation and setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 7.2.2 Verifying connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 7.3 Developing an OLE DB application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 7.3.1 Supported interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 7.3.2 Connecting to database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 7.3.3 Type mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222 7.3.4 Cursors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 7.3.5 Typical database operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225 7.4 Visual Basic, ADO.NET, and SQL Server . . . . . . . . . . . . . . . . . . . . . . . . 237 7.4.1 OLE DB with Visual Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 7.4.2 ADO.NET and the OLEDB bridge . . . . . . . . . . . . . . . . . . . . . . . . . . 240 7.4.3 SQL Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 7.5 Troubleshooting and tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245 7.5.1 Typical errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245 7.5.2 Tracing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248 Chapter 8. Working with .NET data providers. . . . . . . . . . . . . . . . . . . . . . 253 8.1 Informix and .NET data providers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254 8.2 Setup and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254 8.2.1 IBM Informix .Net Provider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254 8.2.2 IBM Data Server Provider for .NET. . . . . . . . . . . . . . . . . . . . . . . . . 255 8.2.3 Verifying connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256 8.3 Developing a .NET application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259 Contents v
Page 1: IBM Informix Developer’s Handbook
Page 4 and 5: Note: Before using this information
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 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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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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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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