1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
|
*********************************************************************
* LOB Demo 1: DMV Database *
* *
* SCENARIO: *
* *
* We consider the example of a database used to store driver's *
* licenses. The licenses are stored as rows of a table containing *
* three columns: the sss number of a person, his/her name and the *
* text summary of the info found in his license. *
* *
* The sss number and the name are the unique social security number *
* and name of an individual. The text summary is a summary of the *
* information on the individual, including his driving record, *
* which can be arbitrarily long and may contain comments and data *
* regarding the person's driving ability. *
* *
* APPLICATION OVERVIEW: *
* *
* This example demonstrate how a Pro*COBOL client can handle the *
* new LOB datatypes. Demonstrated are the mechanisms for accessing *
* and storing lobs to/from tables. *
* *
* To run the demo: *
* *
* 1. Execute the script, lobdemo1.sql in Server Manager *
* 2. Precompile using Pro*COBOL *
* procob lobdemo1 *
* 3. Compile/Link (This step is platform specific) *
* *
* lobdemo1.sql contains the following SQL statements: *
* *
* connect scott/tiger; *
* *
* drop table license_table; *
* *
LOB Sample Program: LOBDEMO1.PCO
13-22 Pro*COBOL Programmer’s Guide
* create table license_table( *
* sss char(9), *
* name varchar2(50), *
* txt_summary clob); *
* *
* insert into license_table *
* values('971517006', 'Dennis Kernighan', *
* 'Wearing a Bright Orange Shirt'); *
* *
* insert into license_table *
* values('555001212', 'Eight H. Number', *
* 'Driving Under the Influence'); *
* *
* insert into license_table *
* values('010101010', 'P. Doughboy', *
* 'Impersonating An Oracle Employee'); *
* *
* insert into license_table *
* values('555377012', 'Calvin N. Hobbes', *
* 'Driving Under the Influence'); *
* *
* The main program provides the menu of actions that can be *
* performed. The program stops when the number 5 (Quit) option *
* is entered. Depending on the input, this main program calls *
* the appropriate nested program to execute the chosen action. *
* *
*********************************************************************
IDENTIFICATION DIVISION.
PROGRAM-ID. LOBDEMO1.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 USERNAME PIC X(5).
01 PASSWD PIC X(5).
01 CHOICE PIC 9 VALUE 0.
01 SSS PIC X(9).
01 SSSEXISTS PIC 9 VALUE ZERO.
01 LICENSE-TXT SQL-CLOB .
01 NEWCRIME PIC X(35) VARYING.
01 SSSCOUNT PIC S9(4) COMP.
01 THE-STRING PIC X(200) VARYING.
01 TXT-LENGTH PIC S9(9) COMP.
01 CRIMES.
05 FILLER PIC X(35) VALUE "Driving Under the Influence".
05 FILLER PIC X(35) VALUE "Grand Theft Auto".
05 FILLER PIC X(35) VALUE "Driving Without a License".
05 FILLER PIC X(35) VALUE
"Impersonating an Oracle Employee".
05 FILLER PIC X(35) VALUE "Wearing a Bright Orange Shirt".
01 CRIMELIST REDEFINES CRIMES.
05 CRIME PIC X(35) OCCURS 5 TIMES.
01 CRIME-INDEX PIC 9.
01 TXT-LEN PIC S9(9) COMP.
01 CRIME-LEN PIC S9(9) COMP.
01 NAME1 PIC X(50) VARYING.
01 NEWNAME PIC X(50).
*********************************************************************
EXEC SQL INCLUDE SQLCA END-EXEC.
PROCEDURE DIVISION.
A000-CONTROL SECTION.
*********************************************************************
* A000-CONTROL
* Overall control section
*********************************************************************
A000-CNTRL.
EXEC SQL
WHENEVER SQLERROR DO PERFORM Z900-SQLERROR
END-EXEC.
PERFORM B000-LOGON.
PERFORM C000-MAIN UNTIL CHOICE = 5.
PERFORM D000-LOGOFF.
A000-EXIT.
STOP RUN.
B000-LOGON SECTION.
*********************************************************************
* B000-LOGON
* Log on to database.
*********************************************************************
B000-LGN.
DISPLAY '**************************************************'.
DISPLAY '* Welcome to the DMV Database *'.
DISPLAY '**************************************************'.
MOVE "scott" TO USERNAME.
MOVE "tiger" TO PASSWD.
EXEC SQL
CONNECT :USERNAME IDENTIFIED BY :PASSWD
END-EXEC.
DISPLAY " ".
DISPLAY "Connecting to license database account: ",
USERNAME, "/", PASSWD.
DISPLAY " ".
B000-EXIT.
EXIT.
C000-MAIN SECTION.
*********************************************************************
* C000-MAIN
* Display the main menu and action requests
*********************************************************************
C000-MN.
DISPLAY " ".
DISPLAY "License Options:".
DISPLAY "1. List available records by SSS number".
DISPLAY "2. Get information on a particular record".
DISPLAY "3. Add crime to a record".
DISPLAY "4. Insert new record to database".
DISPLAY "5. Quit".
DISPLAY " ".
MOVE ZERO TO CHOICE.
PERFORM Z300-ACCEPT-CHOICE UNTIL CHOICE < 6
AND CHOICE > 0.
IF (CHOICE = 1)
PERFORM C100-LIST-RECORDS.
IF (CHOICE = 2)
PERFORM C200-GET-RECORD.
IF (CHOICE = 3)
PERFORM C300-ADD-CRIME.
LOB Sample Program: LOBDEMO1.PCO
13-24 Pro*COBOL Programmer’s Guide
IF (CHOICE = 4)
PERFORM C400-NEW-RECORD.
C000-EXIT.
EXIT.
C100-LIST-RECORDS SECTION.
*********************************************************************
* C100-LIST-RECORDS
* Select Social Security Numbers from LICENCSE_TABLE
* and display the list
*********************************************************************
C100-LST.
EXEC SQL DECLARE SSS_CURSOR CURSOR FOR
SELECT SSS FROM LICENSE_TABLE
END-EXEC.
EXEC SQL OPEN SSS_CURSOR END-EXEC.
DISPLAY "Available records:".
PERFORM C110-DISPLAY-RECORDS UNTIL SQLCODE = 1403.
EXEC SQL CLOSE SSS_CURSOR END-EXEC.
C100-EXIT.
EXIT.
C110-DISPLAY-RECORDS SECTION.
*********************************************************************
* C110-DISPLAY-RECORDS
* Fetch the next record from the cursor and display it.
*********************************************************************
C110-DSPLY.
EXEC SQL FETCH SSS_CURSOR INTO :SSS END-EXEC.
IF SQLCODE = 0 THEN
DISPLAY SSS.
C110-EXIT.
EXIT.
C200-GET-RECORD SECTION.
*******************************************************************
* C200-GET-RECORD
* Allocates the global clob LICENSE-TXT then selects
* the name and text which corresponds to the client-supplied
* sss. It then calls Z200-PRINTCRIME to print the information and
* frees the clob.
*******************************************************************
C200-GTRECRD.
PERFORM Z100-GET-SSS.
IF (SSSEXISTS = 1)
EXEC SQL ALLOCATE :LICENSE-TXT END-EXEC
EXEC SQL SELECT NAME, TXT_SUMMARY
INTO :NAME1, :LICENSE-TXT FROM LICENSE_TABLE
WHERE SSS = :SSS END-EXEC
DISPLAY "==================================================
- "========================"
DISPLAY " "
DISPLAY "NAME: ", NAME1-ARR, "SSS: ", SSS
DISPLAY " "
PERFORM Z200-PRINTCRIME
DISPLAY " "
DISPLAY "==================================================
- "========================"
EXEC SQL FREE :LICENSE-TXT END-EXEC
ELSE
DISPLAY "SSS Number Not Found".
C200-EXIT.
EXIT.
C310-GETNEWCRIME SECTION.
*******************************************************************
* C310-GETNEWCRIME
* Provides a list of the possible crimes to the user and
* stores the user's correct response in the variable
* NEWCRIME.
*******************************************************************
C310-GTNWCRM.
EXEC SQL WHENEVER SQLERROR CONTINUE END-EXEC.
DISPLAY " ".
DISPLAY "Select from the following:".
PERFORM C311-DISPLAY-CRIME
VARYING CRIME-INDEX FROM 1 BY 1
UNTIL CRIME-INDEX > 5.
MOVE ZERO TO CHOICE.
PERFORM Z300-ACCEPT-CHOICE UNTIL CHOICE < 6
AND CHOICE > 0.
MOVE CRIME(CHOICE) TO NEWCRIME-ARR.
MOVE 35 TO NEWCRIME-LEN.
MOVE ZERO TO CHOICE.
C310-EXIT.
EXIT.
C311-DISPLAY-CRIME SECTION.
*******************************************************************
* C311-DISPLAY-CRIME
* Display an element of the crime table
*******************************************************************
C311-DSPLYCRM.
DISPLAY "(", CRIME-INDEX, ") ", CRIME(CRIME-INDEX).
C311-EXIT.
EXIT.
C320-APPENDTOCLOB SECTION.
*******************************************************************
* C320-APPENDTOCLOB
* Obtains the length of the global clob LICENSE-TXT and
* uses that in the LOB WRITE statement to append the NEWCRIME
* character buffer to the global clob LICENSE-TXT.
* The name corresponding the global SSS is then selected
* and displayed to the screen along with value of LICENSE-TXT.
* The caller to this function must allocate, select and later
* free the global clob LICENSE-TXT.
*******************************************************************
C320-PPNDTCLB.
EXEC SQL
WHENEVER SQLERROR DO PERFORM Z900-SQLERROR
END-EXEC.
EXEC SQL LOB DESCRIBE :LICENSE-TXT GET LENGTH
INTO :TXT-LEN END-EXEC.
MOVE NEWCRIME-LEN TO CRIME-LEN.
LOB Sample Program: LOBDEMO1.PCO
13-26 Pro*COBOL Programmer’s Guide
IF (TXT-LEN NOT = 0)
ADD 3 TO TXT-LEN
ELSE
ADD 1 TO TXT-LEN.
EXEC SQL LOB WRITE :CRIME-LEN FROM :NEWCRIME
INTO :LICENSE-TXT AT :TXT-LEN END-EXEC.
EXEC SQL SELECT NAME INTO :NAME1 FROM LICENSE_TABLE
WHERE SSS = :SSS END-EXEC.
DISPLAY " ".
DISPLAY "NAME: ", NAME1-ARR, "SSS: ", SSS.
DISPLAY " ".
PERFORM Z200-PRINTCRIME.
DISPLAY " ".
C320-EXIT.
EXIT.
C300-ADD-CRIME SECTION.
*******************************************************************
* ADD-CRIME
* Obtains a sss and crime from the user and appends
* the crime to the list of crimes of the corresponding sss.
*******************************************************************
C300-DDCRM.
EXEC SQL
WHENEVER SQLERROR DO PERFORM Z900-SQLERROR
END-EXEC.
PERFORM Z100-GET-SSS.
IF (SSSEXISTS = 1)
EXEC SQL ALLOCATE :LICENSE-TXT END-EXEC
PERFORM C310-GETNEWCRIME
EXEC SQL SELECT TXT_SUMMARY INTO :LICENSE-TXT
FROM LICENSE_TABLE WHERE SSS = :SSS
FOR UPDATE END-EXEC
PERFORM C320-APPENDTOCLOB
EXEC SQL FREE :LICENSE-TXT END-EXEC
ELSE
DISPLAY "SSS Number Not Found".
C300-EXIT.
EXIT.
C400-NEW-RECORD SECTION.
*******************************************************************
* C400-NEW-RECORD
* Obtains the sss and name of a new record and inserts them
* along with an empty_clob() for the clob in the table.
*******************************************************************
C400-NWRCRD.
PERFORM Z100-GET-SSS.
IF (SSSEXISTS = 1)
DISPLAY "Record with that sss number already exists"
ELSE
DISPLAY "Name? " WITH NO ADVANCING
ACCEPT NEWNAME
DISPLAY " ".
EXEC SQL ALLOCATE :LICENSE-TXT END-EXEC
EXEC SQL INSERT INTO LICENSE_TABLE
VALUES (:SSS, :NEWNAME, EMPTY_CLOB()) END-EXEC
EXEC SQL SELECT TXT_SUMMARY INTO :LICENSE-TXT
FROM LICENSE_TABLE WHERE SSS = :SSS END-EXEC
DISPLAY "==================================================
- "========================"
DISPLAY "NAME: ", NEWNAME,"SSS: ", SSS
PERFORM Z200-PRINTCRIME
DISPLAY "==================================================
- "========================"
EXEC SQL FREE :LICENSE-TXT END-EXEC.
C400-EXIT.
EXIT.
D000-LOGOFF SECTION.
*******************************************************************
* D000-LOGOFF
* Commit the work done to the database and log off
*******************************************************************
D000-LGFF.
EXEC SQL COMMIT WORK RELEASE END-EXEC.
DISPLAY " ".
DISPLAY "HAVE A GOOD DAY!".
DISPLAY " ".
D000-EXIT.
STOP RUN.
Z100-GET-SSS SECTION.
*******************************************************************
* Z100-GET-SSS
* Fills the global variable SSS with the client-supplied sss.
* Sets the global variable SSSEXISTS to 0 if the sss does not
* correspond to any entry in the database, else sets it to 1.
*******************************************************************
Z100-GTSSS.
DISPLAY "Social Security Number? " WITH NO ADVANCING.
ACCEPT SSS.
DISPLAY " ".
EXEC SQL SELECT COUNT(*) INTO :SSSCOUNT FROM LICENSE_TABLE
WHERE SSS = :SSS END-EXEC.
IF (SSSCOUNT = 0)
MOVE 0 TO SSSEXISTS
ELSE
MOVE 1 TO SSSEXISTS.
Z100-EXIT.
EXIT.
Z200-PRINTCRIME SECTION.
*******************************************************************
* Z200-PRINTCRIME
* Obtains the length of the global clob LICENSE-TXT and
* uses that in the LOB READ statement to read the clob
* into a character buffer to display the contents of the clob.
* The caller to this function must allocate, select and later
* free the global clob LICENSE-TXT.
*******************************************************************
Z200-PRNTCRM.
DISPLAY "=====================".
DISPLAY " CRIME SHEET SUMMARY ".
DISPLAY "=====================".
LOB Sample Program: LOBDEMO1.PCO
13-28 Pro*COBOL Programmer’s Guide
MOVE SPACE TO THE-STRING-ARR.
EXEC SQL LOB DESCRIBE :LICENSE-TXT GET LENGTH
INTO :TXT-LENGTH END-EXEC.
IF (TXT-LENGTH = 0)
DISPLAY "Record is clean"
ELSE
EXEC SQL LOB READ :TXT-LENGTH FROM :LICENSE-TXT
INTO :THE-STRING END-EXEC
DISPLAY THE-STRING-ARR.
Z200-EXIT.
EXIT.
Z300- |
[PRO*COBOL] Manipulation de LOB
Répondre avec citation
A1Q-J8881
Partager