IBM Informix Developer's Handbook - IBM Redbooks

More documents

Recommendations

Info

Trademarks IBM, the IBM logo, and ibm.com are trademarks or registered trademarks of International Business Machines Corporation in the United States, other countries, or both. These and other IBM trademarked terms are marked on their first occurrence in this information with the appropriate symbol (® or ), indicating US registered or common law trademarks owned by IBM at the time this information was published. Such trademarks may also be registered or common law trademarks in other countries. A current list of IBM trademarks is available on the Web at http://www.ibm.com/legal/copytrade.shtml The following terms are trademarks of the International Business Machines Corporation in the United States, other countries, or both: AIX® DataBlade® DB2 Universal Database DB2® developerWorks® x IBM Informix Developer’s Handbook Distributed Relational Database Architecture DRDA® IBM® Informix® MQSeries® The following terms are trademarks of other companies: Rational® Redbooks® Redpaper Redbooks (logo) ® UC2 WebSphere® Java, and all Java-based trademarks are trademarks of Sun Microsystems, Inc. in the United States, other countries, or both. Microsoft, Windows, and the Windows logo are trademarks of Microsoft Corporation in the United States, other countries, or both. UNIX is a registered trademark of The Open Group in the United States and other countries. Linux is a trademark of Linus Torvalds in the United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others.
Preface IBM® Informix® is a low-administration, easy-to-use, and embeddable database that is ideal for application development. It supports a wide range of development platforms, such as Java, .NET, PHP, and web services, enabling developers to build database applications in the language of their choice. Informix is designed to handle RDBMS data and XML without modification and can be extended easily to handle new data sets. This IBM Redbooks® publication provides fundamentals of Informix application development. It covers the Informix Client installation and configuration for application development environments. It discusses the skills and techniques for building Informix applications with Java, ESQL/C, OLE DB, .NET, PHP, Ruby on Rails, DataBlade®, and Hibernate. The book uses code examples to demonstrate how to develop an Informix application with various drivers, APIs, and interfaces. It also provides application development troubleshooting and considerations for performance. This book is intended for developers who use IBM Informix for application development. Although some of the topics that we discuss are highly technical, the information in the book might also be helpful for managers or database administrators who are looking to better understand their Informix development environment. The team who wrote this book This book was produced by a team of specialists from around the world working at the International Technical Support Organization, Rochester Center. Whei-Jen Chen is a Project Leader at the International Technical Support Organization, San Jose Center. She has extensive experience in application development, database design and modeling, and DB2® system administration. Whei-Jen is an IBM Certified Solutions Expert in Database Administration and Application Development, and an IBM Certified IT Specialist © Copyright IBM Corp. 2010. All rights reserved. xi
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 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
Page 56 and 57: 5. If you selected a Custom install
Page 58 and 59: At this stage, the Client SDK insta
Page 60 and 61: You can download some of these comp
Page 62 and 63:
46 IBM Informix Developer’s Handb
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
Page 94 and 95:
} 78 IBM Informix Developer’s Han
Page 96 and 97:
SQLSMALLINT DecimalDigits, /* ibSca
Page 98 and 99:
If your application requires only S
Page 100 and 101:
Page 102 and 103:
} SQLCHAR sname[15+1]; SQLLEN lcode
Page 104 and 105:
fprintf (stdout, "Connected\n"); 88
Page 106 and 107:
SQLAllocHandle (SQL_HANDLE_ENV, SQL
Page 108 and 109:
SQLAllocHandle (SQL_HANDLE_ENV, SQL
Page 110 and 111:
Page 112 and 113:
contains the data or special attrib
Page 114 and 115:
Function Description ifx_lo_specset
Page 116 and 117:
SQLSMALLINT lospec_size; SQLINTEGER
Page 118 and 119:
4. Call ifx_lo_open() to open the s
Page 120 and 121:
SQLBindParameter (hstmt, 1, SQL_PAR
Page 122 and 123:
} SQLFreeHandle (SQL_HANDLE_ENV, he
Page 124 and 125:
SQLCHAR*insertStmt = (SQLCHAR *) "I
Page 126 and 127:
Accessing a complex data type Examp
Page 128 and 129:
C:\work> 3.3.5 Error handling Ludwi
Page 130 and 131:
C:\work>connect_error demo_on;UID=w
Page 132 and 133:
We create a function called CheckDi
Page 134 and 135:
Figure 3-14 shows the Tracing tab.
Page 136 and 137:
Example 3-36 demonstrates how to se
Page 138 and 139:
DRDADEBUG All IBM Data Server drive
Page 140 and 141:
124 IBM Informix Developer’s Hand
Page 142 and 143:
4.1 Informix ESQL/C Informix ESQL/C
Page 144 and 145:
Example 4-1 shows a simple sqlhosts
Page 146 and 147:
Compiling ESQL/C programs The esql
Page 148 and 149:
Platform Environment variable Linux
Page 150 and 151:
Example 4-3 shows a statement that
Page 152 and 153:
:fname[i], :lname[i], :company[i],
Page 154 and 155:
The SELECT statement shown in Examp
Page 156 and 157:
EXEC SQL fetch ex_cursor into :n1,:
Page 158 and 159:
Table 4-3 lists a few ESQL/C data t
Page 160 and 161:
the sbspace in the server before yo
Page 162 and 163:
Example 4-10 shows the ESQL/C comma
Page 164 and 165:
Example 4-12 shows the output of Ex
Page 166 and 167:
} EXEC SQL END DECLARE SECTION; 150
Page 168 and 169:
C->S (16) Time: 2010-07-06 20:21:58
Page 170 and 171:
5.1 JDBC drivers for an Informix da
Page 172 and 173:
5.1.2 IBM Data Server Driver for JD
Page 174 and 175:
Example 5-4 shows the CLASSPATH env
Page 176 and 177:
Example 5-6 shows the compile line
Page 178 and 179:
programmer uses Java data types to
Page 180 and 181:
Example 5-9 shows the syntax of the
Page 182 and 183:
" Connected to Informix Dynamic Ser
Page 184 and 185:
5.4.2 Manipulating data In this sec
Page 186 and 187:
conn.close(); } catch ( Exception e
Page 188 and 189:
Example 5-15 demonstrates how to di
Page 190 and 191:
conn = DriverManager.getConnection(
Page 192 and 193:
con.setAutoCommit(false); Statement
Page 194 and 195:
System.out.format("Last row: \t%d,"
Page 196 and 197:
PreparedStatement pstmt=conn.prepar
Page 198 and 199:
System.err.println(e); } } } Exampl
Page 200 and 201:
Issuer: CN=bedfont.uk.ibm.com, O=ib
Page 202 and 203:
5.6.1 Class not found errors The fo
Page 204 and 205:
5.7.2 IBM Data Server Driver for JD
Page 206 and 207:
6.1 Hibernate for Java This section
Page 208 and 209:
A Hibernate application includes th
Page 210 and 211:
6.2.2 Configuration File Descriptio
Page 212 and 213:
Example 6-3 shows a hibernate.cfg.x
Page 214 and 215:
name="State" table="States">
Page 216 and 217:
Example 6-6 shows the CLASSPATH var
Page 218 and 219:
informix password org.hibernate
Page 220 and 221:
Example 6-11 shows basic Java code
Page 222 and 223:
The only difference between the loa
Page 224 and 225:
1, AZ, Arizona 2, CA, California C:
Page 226 and 227:
Example 6-19 shows the output of th
Page 228 and 229:
private Long id; private String cod
Page 230 and 231:
Page 232 and 233:
7.1 IBM Informix OLE DB Provider In
Page 234 and 235:
through COM. You can use it to test
Page 236 and 237:
7.3.1 Supported interfaces An OLE D
Page 238 and 239:
7.3.3 Type mapping Keyword Descript
Page 240 and 241:
7.3.4 Cursors Informix OLE DB Provi
Page 242 and 243:
Example 7-3 demonstrates how to con
Page 244 and 245:
Connect to the Database Server CHEC
Page 246 and 247:
#define CHECK(hr) if (((HRESULT)(hr
Page 248 and 249:
} 232 IBM Informix Developer’s Ha
Page 250 and 251:
if(lDataLength > 0) { // Call GetCh
Page 252 and 253:
_bstr_t bstrPassWord = "password";
Page 254 and 255:
Provider with some of the available
Page 256 and 257:
cx.connectionstring = "Data Source=
Page 258 and 259:
California 0.08250 c:\work> 7.4.3 S
Page 260 and 261:
The user ID for the Informix databa
Page 262 and 263:
happen that the 32-bit provider is
Page 264 and 265:
7.5.2 Tracing Failure when handling
Page 266 and 267:
A44: 53C Exit Object Address: 0x032
Page 268 and 269:
Page 270 and 271:
8.1 Informix and .NET data provider
Page 272 and 273:
Both providers have the same assemb
Page 274 and 275:
Example 8-3 shows how to compile an
Page 276 and 277:
Attribute Description Default Exclu
Page 278 and 279:
The majority of the connection stri
Page 280 and 281:
Data Server Provider for .NET type
Page 282 and 283:
Example 8-7 shows the output of Exa
Page 284 and 285:
Table 8-9 lists the methods that th
Page 286 and 287:
Method Description IfxMonthSpan Get
Page 288 and 289:
} } int drows=0; 272 IBM Informix D
Page 290 and 291:
Example 8-16 shows the output of Ex
Page 292 and 293:
Page 294 and 295:
Method Description Int64 Seek(offse
Page 296 and 297:
... 280 IBM Informix Developer’s
Page 298 and 299:
IfxConnection conn; IfxClob vclob;
Page 300 and 301:
Property Type Description Year Int3
Page 302 and 303:
Hour : 8 Minute: 20 C:\work>c Arith
Page 304 and 305:
Method Description Compare(IfxDec1,
Page 306 and 307:
C:\work>decimal Value Sales Tax : 0
Page 308 and 309:
Ceiling Sales Tax : 1.0 Negative Sa
Page 310 and 311:
Visual Studio Add-In provides tools
Page 312 and 313:
9.1 Informix and PHP extensions The
Page 314 and 315:
- Console mode Enter one of the fol
Page 316 and 317:
9.2.4 Verifying connectivity You ca
Page 318 and 319:
► Secure Although PHP is open sou
Page 320 and 321:
*--- persistent connect trusted use
Page 322 and 323:
In a web application, the input dat
Page 324 and 325:
Dynamic SQL statements Dynamic SQL
Page 326 and 327:
$stmt->bindValue(':p9', $_POST["pho
Page 328 and 329:
*--- Verification ---*/ $stmt1=$dbc
Page 330 and 331:
$row=$stmt1->fetch(PDO::FETCH_ASSOC
Page 332 and 333:
} /*--- Get the BLOB from the datab
Page 334 and 335:
In Example 9-17 on page 316, the da
Page 336 and 337:
Function Description db2_bind_param
Page 338 and 339:
The IBM_DB2 extension This PHP exte
Page 340 and 341:
9.3.5 Exception handling Error hand
Page 342 and 343:
The error information that is gener
Page 344 and 345:
9.3.6 Troubleshooting printf("NonCr
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
Page 354 and 355:
One variable in, one result out For
Page 356 and 357:
10.2.2 UDRs in Java 5 1005 6 1006 7
Page 358 and 359:
Note: The paths for .jar files that
Page 360 and 361:
We use the following procedure to c
Page 362 and 363:
For our example, JVPCLASSPATH is se
Page 364 and 365:
10.2.3 UDRs in C and break somethin
Page 366 and 367:
3. Set the bld file permissions as
Page 368 and 369:
4. Create the function in dbaccess.
Page 370 and 371:
Installing the DataBlade Any DataBl
Page 372 and 373:
To connect to a database, run one o
Page 374 and 375:
IBM Informix DataBlade module name
Page 376 and 377:
interface, called BladeSmith, allow
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
Page 384 and 385:
03/07/2010 17:30 1,088 LICENSE 03/0
Page 386 and 387:
The Rails Adapter can be installed
Page 388 and 389:
server: demo_on username: informix
Page 390 and 391:
Using Ruby Informix driver In this
Page 392 and 393:
If the SQL statement returns only o
Page 394 and 395:
Example 11-17 shows how to select a
Page 396 and 397:
Example 11-19 shows a simple Ruby s
Page 398 and 399:
# create a prepare object stmt = IB
Page 400 and 401:
11.4 Using the Rails Adapter with R
Page 402 and 403:
For more information, refer to: htt
Page 404 and 405:
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
Page 414 and 415:
Page 416 and 417:
12.1 Basic concepts In this section
Page 418 and 419:
A web service can perform the follo
Page 420 and 421:
Example 12-1 shows a typical shell
Page 422 and 423:
12.3.2 The w4gl utility For additio
Page 424 and 425:
Parameter Description ws_func Funct
Page 426 and 427:
In the remaining sections, we descr
Page 428 and 429:
Example 12-8 shows the APP SERVER f
Page 430 and 431:
Add details about the web service Y
Page 432 and 433:
Source file information Finally, yo
Page 434 and 435:
The Generate operation creates the
Page 436 and 437:
process, running each individual st
Page 438 and 439:
The compressed file is left in the
Page 440 and 441:
Figure 12-3 shows the WSDL informat
Page 442 and 443:
| Target Directory [/work/publish ]
Page 444 and 445:
After this process is complete, the
Page 446 and 447:
while using one of the I4GL web ser
Page 448 and 449:
Keeping the wrapper C files in the
Page 450 and 451:
12.6.2 Tracing A developer can use
Page 452 and 453:
Page 454 and 455:
13.1 Concurrency and locking 13.1.1
Page 456 and 457:
13.1.2 Lock duration The length of
Page 458 and 459:
If a table is not created with row
Page 460 and 461:
How the database server manages byt
Page 462 and 463:
13.2.1 Deadlocks reader can read a
Page 464 and 465:
ow that has not been committed (thi
Page 466 and 467:
should check with the DBA to determ
Page 468 and 469:
Note: For information about writing
Page 470 and 471:
The amount of memory storage per lo
Page 472 and 473:
The DIRECTIVES parameter The DIRECT
Page 474 and 475:
13.5 Working with your database adm
Page 476 and 477:
► Metadata updates affect logging
Page 478 and 479:
Guidelines for setting VPCLASS: ►
Page 480 and 481:
The lock level is determined by the
Page 482 and 483:
Page 484 and 485:
area of specific interest. The func
Page 486 and 487:
B.1 Distributed transactions A tran
Page 488 and 489:
* Compile with: * on UNIX systems:
Page 490 and 491:
} { printf("XA_PREPARE failed with
Page 492 and 493:
When using distributed transactions
Page 494 and 495:
Page 496 and 497:
Online resources ► IBM Informix D
Page 498 and 499:
cast function 332 cast support func
Page 500 and 501:
IfxDecimal public method 287 ifxdot
Page 502 and 503:
jvpjavavm 341 jvplog 347 jvplogfile
Page 504 and 505:
sql_longvarbinary 80, 96 sql_longva
Page 506 and 507:
Page 510:
IBM Informix Developer’s Handbook
show all

IBM Informix Developer's Handbook - IBM Redbooks

Create successful ePaper yourself

Delete template?

Save as template?