xref: /sqlite-3.40.0/src/test2.c (revision 8a29dfde)
1 /*
2 ** 2001 September 15
3 **
4 ** The author disclaims copyright to this source code.  In place of
5 ** a legal notice, here is a blessing:
6 **
7 **    May you do good and not evil.
8 **    May you find forgiveness for yourself and forgive others.
9 **    May you share freely, never taking more than you give.
10 **
11 *************************************************************************
12 ** Code for testing the pager.c module in SQLite.  This code
13 ** is not included in the SQLite library.  It is used for automated
14 ** testing of the SQLite library.
15 **
16 ** $Id: test2.c,v 1.57 2008/03/21 16:45:48 drh Exp $
17 */
18 #include "sqliteInt.h"
19 #include "tcl.h"
20 #include <stdlib.h>
21 #include <string.h>
22 #include <ctype.h>
23 
24 /*
25 ** Interpret an SQLite error number
26 */
27 static char *errorName(int rc){
28   char *zName;
29   switch( rc ){
30     case SQLITE_OK:         zName = "SQLITE_OK";          break;
31     case SQLITE_ERROR:      zName = "SQLITE_ERROR";       break;
32     case SQLITE_PERM:       zName = "SQLITE_PERM";        break;
33     case SQLITE_ABORT:      zName = "SQLITE_ABORT";       break;
34     case SQLITE_BUSY:       zName = "SQLITE_BUSY";        break;
35     case SQLITE_NOMEM:      zName = "SQLITE_NOMEM";       break;
36     case SQLITE_READONLY:   zName = "SQLITE_READONLY";    break;
37     case SQLITE_INTERRUPT:  zName = "SQLITE_INTERRUPT";   break;
38     case SQLITE_IOERR:      zName = "SQLITE_IOERR";       break;
39     case SQLITE_CORRUPT:    zName = "SQLITE_CORRUPT";     break;
40     case SQLITE_FULL:       zName = "SQLITE_FULL";        break;
41     case SQLITE_CANTOPEN:   zName = "SQLITE_CANTOPEN";    break;
42     case SQLITE_PROTOCOL:   zName = "SQLITE_PROTOCOL";    break;
43     case SQLITE_EMPTY:      zName = "SQLITE_EMPTY";       break;
44     case SQLITE_SCHEMA:     zName = "SQLITE_SCHEMA";      break;
45     case SQLITE_CONSTRAINT: zName = "SQLITE_CONSTRAINT";  break;
46     case SQLITE_MISMATCH:   zName = "SQLITE_MISMATCH";    break;
47     case SQLITE_MISUSE:     zName = "SQLITE_MISUSE";      break;
48     case SQLITE_NOLFS:      zName = "SQLITE_NOLFS";       break;
49     default:                zName = "SQLITE_Unknown";     break;
50   }
51   return zName;
52 }
53 
54 /*
55 ** Page size and reserved size used for testing.
56 */
57 static int test_pagesize = 1024;
58 
59 /*
60 ** Usage:   pager_open FILENAME N-PAGE
61 **
62 ** Open a new pager
63 */
64 static int pager_open(
65   void *NotUsed,
66   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
67   int argc,              /* Number of arguments */
68   const char **argv      /* Text of each argument */
69 ){
70   u16 pageSize;
71   Pager *pPager;
72   int nPage;
73   int rc;
74   char zBuf[100];
75   if( argc!=3 ){
76     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
77        " FILENAME N-PAGE\"", 0);
78     return TCL_ERROR;
79   }
80   if( Tcl_GetInt(interp, argv[2], &nPage) ) return TCL_ERROR;
81   rc = sqlite3PagerOpen(sqlite3_vfs_find(0), &pPager, argv[1], 0, 0,
82       SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE | SQLITE_OPEN_MAIN_DB);
83   if( rc!=SQLITE_OK ){
84     Tcl_AppendResult(interp, errorName(rc), 0);
85     return TCL_ERROR;
86   }
87   sqlite3PagerSetCachesize(pPager, nPage);
88   pageSize = test_pagesize;
89   sqlite3PagerSetPagesize(pPager, &pageSize);
90   sqlite3_snprintf(sizeof(zBuf),zBuf,"%p",pPager);
91   Tcl_AppendResult(interp, zBuf, 0);
92   return TCL_OK;
93 }
94 
95 /*
96 ** Usage:   pager_close ID
97 **
98 ** Close the given pager.
99 */
100 static int pager_close(
101   void *NotUsed,
102   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
103   int argc,              /* Number of arguments */
104   const char **argv      /* Text of each argument */
105 ){
106   Pager *pPager;
107   int rc;
108   if( argc!=2 ){
109     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
110        " ID\"", 0);
111     return TCL_ERROR;
112   }
113   pPager = sqlite3TextToPtr(argv[1]);
114   rc = sqlite3PagerClose(pPager);
115   if( rc!=SQLITE_OK ){
116     Tcl_AppendResult(interp, errorName(rc), 0);
117     return TCL_ERROR;
118   }
119   return TCL_OK;
120 }
121 
122 /*
123 ** Usage:   pager_rollback ID
124 **
125 ** Rollback changes
126 */
127 static int pager_rollback(
128   void *NotUsed,
129   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
130   int argc,              /* Number of arguments */
131   const char **argv      /* Text of each argument */
132 ){
133   Pager *pPager;
134   int rc;
135   if( argc!=2 ){
136     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
137        " ID\"", 0);
138     return TCL_ERROR;
139   }
140   pPager = sqlite3TextToPtr(argv[1]);
141   rc = sqlite3PagerRollback(pPager);
142   if( rc!=SQLITE_OK ){
143     Tcl_AppendResult(interp, errorName(rc), 0);
144     return TCL_ERROR;
145   }
146   return TCL_OK;
147 }
148 
149 /*
150 ** Usage:   pager_commit ID
151 **
152 ** Commit all changes
153 */
154 static int pager_commit(
155   void *NotUsed,
156   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
157   int argc,              /* Number of arguments */
158   const char **argv      /* Text of each argument */
159 ){
160   Pager *pPager;
161   int rc;
162   if( argc!=2 ){
163     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
164        " ID\"", 0);
165     return TCL_ERROR;
166   }
167   pPager = sqlite3TextToPtr(argv[1]);
168   rc = sqlite3PagerCommitPhaseOne(pPager, 0, 0, 0);
169   if( rc!=SQLITE_OK ){
170     Tcl_AppendResult(interp, errorName(rc), 0);
171     return TCL_ERROR;
172   }
173   rc = sqlite3PagerCommitPhaseTwo(pPager);
174   if( rc!=SQLITE_OK ){
175     Tcl_AppendResult(interp, errorName(rc), 0);
176     return TCL_ERROR;
177   }
178   return TCL_OK;
179 }
180 
181 /*
182 ** Usage:   pager_stmt_begin ID
183 **
184 ** Start a new checkpoint.
185 */
186 static int pager_stmt_begin(
187   void *NotUsed,
188   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
189   int argc,              /* Number of arguments */
190   const char **argv      /* Text of each argument */
191 ){
192   Pager *pPager;
193   int rc;
194   if( argc!=2 ){
195     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
196        " ID\"", 0);
197     return TCL_ERROR;
198   }
199   pPager = sqlite3TextToPtr(argv[1]);
200   rc = sqlite3PagerStmtBegin(pPager);
201   if( rc!=SQLITE_OK ){
202     Tcl_AppendResult(interp, errorName(rc), 0);
203     return TCL_ERROR;
204   }
205   return TCL_OK;
206 }
207 
208 /*
209 ** Usage:   pager_stmt_rollback ID
210 **
211 ** Rollback changes to a checkpoint
212 */
213 static int pager_stmt_rollback(
214   void *NotUsed,
215   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
216   int argc,              /* Number of arguments */
217   const char **argv      /* Text of each argument */
218 ){
219   Pager *pPager;
220   int rc;
221   if( argc!=2 ){
222     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
223        " ID\"", 0);
224     return TCL_ERROR;
225   }
226   pPager = sqlite3TextToPtr(argv[1]);
227   rc = sqlite3PagerStmtRollback(pPager);
228   if( rc!=SQLITE_OK ){
229     Tcl_AppendResult(interp, errorName(rc), 0);
230     return TCL_ERROR;
231   }
232   return TCL_OK;
233 }
234 
235 /*
236 ** Usage:   pager_stmt_commit ID
237 **
238 ** Commit changes to a checkpoint
239 */
240 static int pager_stmt_commit(
241   void *NotUsed,
242   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
243   int argc,              /* Number of arguments */
244   const char **argv      /* Text of each argument */
245 ){
246   Pager *pPager;
247   int rc;
248   if( argc!=2 ){
249     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
250        " ID\"", 0);
251     return TCL_ERROR;
252   }
253   pPager = sqlite3TextToPtr(argv[1]);
254   rc = sqlite3PagerStmtCommit(pPager);
255   if( rc!=SQLITE_OK ){
256     Tcl_AppendResult(interp, errorName(rc), 0);
257     return TCL_ERROR;
258   }
259   return TCL_OK;
260 }
261 
262 /*
263 ** Usage:   pager_stats ID
264 **
265 ** Return pager statistics.
266 */
267 static int pager_stats(
268   void *NotUsed,
269   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
270   int argc,              /* Number of arguments */
271   const char **argv      /* Text of each argument */
272 ){
273   Pager *pPager;
274   int i, *a;
275   if( argc!=2 ){
276     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
277        " ID\"", 0);
278     return TCL_ERROR;
279   }
280   pPager = sqlite3TextToPtr(argv[1]);
281   a = sqlite3PagerStats(pPager);
282   for(i=0; i<9; i++){
283     static char *zName[] = {
284       "ref", "page", "max", "size", "state", "err",
285       "hit", "miss", "ovfl",
286     };
287     char zBuf[100];
288     Tcl_AppendElement(interp, zName[i]);
289     sqlite3_snprintf(sizeof(zBuf),zBuf,"%d",a[i]);
290     Tcl_AppendElement(interp, zBuf);
291   }
292   return TCL_OK;
293 }
294 
295 /*
296 ** Usage:   pager_pagecount ID
297 **
298 ** Return the size of the database file.
299 */
300 static int pager_pagecount(
301   void *NotUsed,
302   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
303   int argc,              /* Number of arguments */
304   const char **argv      /* Text of each argument */
305 ){
306   Pager *pPager;
307   char zBuf[100];
308   if( argc!=2 ){
309     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
310        " ID\"", 0);
311     return TCL_ERROR;
312   }
313   pPager = sqlite3TextToPtr(argv[1]);
314   sqlite3_snprintf(sizeof(zBuf),zBuf,"%d",sqlite3PagerPagecount(pPager));
315   Tcl_AppendResult(interp, zBuf, 0);
316   return TCL_OK;
317 }
318 
319 /*
320 ** Usage:   page_get ID PGNO
321 **
322 ** Return a pointer to a page from the database.
323 */
324 static int page_get(
325   void *NotUsed,
326   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
327   int argc,              /* Number of arguments */
328   const char **argv      /* Text of each argument */
329 ){
330   Pager *pPager;
331   char zBuf[100];
332   DbPage *pPage;
333   int pgno;
334   int rc;
335   if( argc!=3 ){
336     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
337        " ID PGNO\"", 0);
338     return TCL_ERROR;
339   }
340   pPager = sqlite3TextToPtr(argv[1]);
341   if( Tcl_GetInt(interp, argv[2], &pgno) ) return TCL_ERROR;
342   rc = sqlite3PagerGet(pPager, pgno, &pPage);
343   if( rc!=SQLITE_OK ){
344     Tcl_AppendResult(interp, errorName(rc), 0);
345     return TCL_ERROR;
346   }
347   sqlite3_snprintf(sizeof(zBuf),zBuf,"%p",pPage);
348   Tcl_AppendResult(interp, zBuf, 0);
349   return TCL_OK;
350 }
351 
352 /*
353 ** Usage:   page_lookup ID PGNO
354 **
355 ** Return a pointer to a page if the page is already in cache.
356 ** If not in cache, return an empty string.
357 */
358 static int page_lookup(
359   void *NotUsed,
360   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
361   int argc,              /* Number of arguments */
362   const char **argv      /* Text of each argument */
363 ){
364   Pager *pPager;
365   char zBuf[100];
366   DbPage *pPage;
367   int pgno;
368   if( argc!=3 ){
369     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
370        " ID PGNO\"", 0);
371     return TCL_ERROR;
372   }
373   pPager = sqlite3TextToPtr(argv[1]);
374   if( Tcl_GetInt(interp, argv[2], &pgno) ) return TCL_ERROR;
375   pPage = sqlite3PagerLookup(pPager, pgno);
376   if( pPage ){
377     sqlite3_snprintf(sizeof(zBuf),zBuf,"%p",pPage);
378     Tcl_AppendResult(interp, zBuf, 0);
379   }
380   return TCL_OK;
381 }
382 
383 /*
384 ** Usage:   pager_truncate ID PGNO
385 */
386 static int pager_truncate(
387   void *NotUsed,
388   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
389   int argc,              /* Number of arguments */
390   const char **argv      /* Text of each argument */
391 ){
392   Pager *pPager;
393   int rc;
394   int pgno;
395   if( argc!=3 ){
396     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
397        " ID PGNO\"", 0);
398     return TCL_ERROR;
399   }
400   pPager = sqlite3TextToPtr(argv[1]);
401   if( Tcl_GetInt(interp, argv[2], &pgno) ) return TCL_ERROR;
402   rc = sqlite3PagerTruncate(pPager, pgno);
403   if( rc!=SQLITE_OK ){
404     Tcl_AppendResult(interp, errorName(rc), 0);
405     return TCL_ERROR;
406   }
407   return TCL_OK;
408 }
409 
410 
411 /*
412 ** Usage:   page_unref PAGE
413 **
414 ** Drop a pointer to a page.
415 */
416 static int page_unref(
417   void *NotUsed,
418   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
419   int argc,              /* Number of arguments */
420   const char **argv      /* Text of each argument */
421 ){
422   DbPage *pPage;
423   int rc;
424   if( argc!=2 ){
425     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
426        " PAGE\"", 0);
427     return TCL_ERROR;
428   }
429   pPage = (DbPage *)sqlite3TextToPtr(argv[1]);
430   rc = sqlite3PagerUnref(pPage);
431   if( rc!=SQLITE_OK ){
432     Tcl_AppendResult(interp, errorName(rc), 0);
433     return TCL_ERROR;
434   }
435   return TCL_OK;
436 }
437 
438 /*
439 ** Usage:   page_read PAGE
440 **
441 ** Return the content of a page
442 */
443 static int page_read(
444   void *NotUsed,
445   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
446   int argc,              /* Number of arguments */
447   const char **argv      /* Text of each argument */
448 ){
449   char zBuf[100];
450   DbPage *pPage;
451   if( argc!=2 ){
452     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
453        " PAGE\"", 0);
454     return TCL_ERROR;
455   }
456   pPage = sqlite3TextToPtr(argv[1]);
457   memcpy(zBuf, sqlite3PagerGetData(pPage), sizeof(zBuf));
458   Tcl_AppendResult(interp, zBuf, 0);
459   return TCL_OK;
460 }
461 
462 /*
463 ** Usage:   page_number PAGE
464 **
465 ** Return the page number for a page.
466 */
467 static int page_number(
468   void *NotUsed,
469   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
470   int argc,              /* Number of arguments */
471   const char **argv      /* Text of each argument */
472 ){
473   char zBuf[100];
474   DbPage *pPage;
475   if( argc!=2 ){
476     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
477        " PAGE\"", 0);
478     return TCL_ERROR;
479   }
480   pPage = (DbPage *)sqlite3TextToPtr(argv[1]);
481   sqlite3_snprintf(sizeof(zBuf), zBuf, "%d", sqlite3PagerPagenumber(pPage));
482   Tcl_AppendResult(interp, zBuf, 0);
483   return TCL_OK;
484 }
485 
486 /*
487 ** Usage:   page_write PAGE DATA
488 **
489 ** Write something into a page.
490 */
491 static int page_write(
492   void *NotUsed,
493   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
494   int argc,              /* Number of arguments */
495   const char **argv      /* Text of each argument */
496 ){
497   DbPage *pPage;
498   char *pData;
499   int rc;
500   if( argc!=3 ){
501     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
502        " PAGE DATA\"", 0);
503     return TCL_ERROR;
504   }
505   pPage = (DbPage *)sqlite3TextToPtr(argv[1]);
506   rc = sqlite3PagerWrite(pPage);
507   if( rc!=SQLITE_OK ){
508     Tcl_AppendResult(interp, errorName(rc), 0);
509     return TCL_ERROR;
510   }
511   pData = sqlite3PagerGetData(pPage);
512   strncpy(pData, argv[2], test_pagesize-1);
513   pData[test_pagesize-1] = 0;
514   return TCL_OK;
515 }
516 
517 #ifndef SQLITE_OMIT_DISKIO
518 /*
519 ** Usage:   fake_big_file  N  FILENAME
520 **
521 ** Write a few bytes at the N megabyte point of FILENAME.  This will
522 ** create a large file.  If the file was a valid SQLite database, then
523 ** the next time the database is opened, SQLite will begin allocating
524 ** new pages after N.  If N is 2096 or bigger, this will test the
525 ** ability of SQLite to write to large files.
526 */
527 static int fake_big_file(
528   void *NotUsed,
529   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
530   int argc,              /* Number of arguments */
531   const char **argv      /* Text of each argument */
532 ){
533   sqlite3_vfs *pVfs;
534   sqlite3_file *fd = 0;
535   int rc;
536   int n;
537   i64 offset;
538   if( argc!=3 ){
539     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
540        " N-MEGABYTES FILE\"", 0);
541     return TCL_ERROR;
542   }
543   if( Tcl_GetInt(interp, argv[1], &n) ) return TCL_ERROR;
544 
545   pVfs = sqlite3_vfs_find(0);
546   rc = sqlite3OsOpenMalloc(pVfs, argv[2], &fd,
547       (SQLITE_OPEN_CREATE|SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_DB), 0
548   );
549   if( rc ){
550     Tcl_AppendResult(interp, "open failed: ", errorName(rc), 0);
551     return TCL_ERROR;
552   }
553   offset = n;
554   offset *= 1024*1024;
555   rc = sqlite3OsWrite(fd, "Hello, World!", 14, offset);
556   sqlite3OsCloseFree(fd);
557   if( rc ){
558     Tcl_AppendResult(interp, "write failed: ", errorName(rc), 0);
559     return TCL_ERROR;
560   }
561   return TCL_OK;
562 }
563 #endif
564 
565 
566 /*
567 ** sqlite3BitvecBuiltinTest SIZE PROGRAM
568 **
569 ** Invoke the SQLITE_TESTCTRL_BITVEC_TEST operator on test_control.
570 ** See comments on sqlite3BitvecBuiltinTest() for additional information.
571 */
572 static int testBitvecBuiltinTest(
573   void *NotUsed,
574   Tcl_Interp *interp,    /* The TCL interpreter that invoked this command */
575   int argc,              /* Number of arguments */
576   const char **argv      /* Text of each argument */
577 ){
578   int sz, rc;
579   int nProg = 0;
580   int aProg[100];
581   const char *z;
582   if( argc!=3 ){
583     Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
584                      " SIZE PROGRAM\"", (void*)0);
585   }
586   if( Tcl_GetInt(interp, argv[1], &sz) ) return TCL_ERROR;
587   z = argv[2];
588   while( nProg<99 && *z ){
589     while( *z && !isdigit(*z) ){ z++; }
590     if( *z==0 ) break;
591     aProg[nProg++] = atoi(z);
592     while( isdigit(*z) ){ z++; }
593   }
594   aProg[nProg] = 0;
595   rc = sqlite3_test_control(SQLITE_TESTCTRL_BITVEC_TEST, sz, aProg);
596   Tcl_SetObjResult(interp, Tcl_NewIntObj(rc));
597   return TCL_OK;
598 }
599 
600 /*
601 ** Register commands with the TCL interpreter.
602 */
603 int Sqlitetest2_Init(Tcl_Interp *interp){
604   extern int sqlite3_io_error_persist;
605   extern int sqlite3_io_error_pending;
606   extern int sqlite3_io_error_hit;
607   extern int sqlite3_io_error_hardhit;
608   extern int sqlite3_diskfull_pending;
609   extern int sqlite3_diskfull;
610   extern int sqlite3_pager_n_sort_bucket;
611   static struct {
612     char *zName;
613     Tcl_CmdProc *xProc;
614   } aCmd[] = {
615     { "pager_open",              (Tcl_CmdProc*)pager_open          },
616     { "pager_close",             (Tcl_CmdProc*)pager_close         },
617     { "pager_commit",            (Tcl_CmdProc*)pager_commit        },
618     { "pager_rollback",          (Tcl_CmdProc*)pager_rollback      },
619     { "pager_stmt_begin",        (Tcl_CmdProc*)pager_stmt_begin    },
620     { "pager_stmt_commit",       (Tcl_CmdProc*)pager_stmt_commit   },
621     { "pager_stmt_rollback",     (Tcl_CmdProc*)pager_stmt_rollback },
622     { "pager_stats",             (Tcl_CmdProc*)pager_stats         },
623     { "pager_pagecount",         (Tcl_CmdProc*)pager_pagecount     },
624     { "page_get",                (Tcl_CmdProc*)page_get            },
625     { "page_lookup",             (Tcl_CmdProc*)page_lookup         },
626     { "page_unref",              (Tcl_CmdProc*)page_unref          },
627     { "page_read",               (Tcl_CmdProc*)page_read           },
628     { "page_write",              (Tcl_CmdProc*)page_write          },
629     { "page_number",             (Tcl_CmdProc*)page_number         },
630     { "pager_truncate",          (Tcl_CmdProc*)pager_truncate      },
631 #ifndef SQLITE_OMIT_DISKIO
632     { "fake_big_file",           (Tcl_CmdProc*)fake_big_file       },
633 #endif
634     { "sqlite3BitvecBuiltinTest",(Tcl_CmdProc*)testBitvecBuiltinTest},
635   };
636   int i;
637   for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){
638     Tcl_CreateCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0);
639   }
640   Tcl_LinkVar(interp, "sqlite_io_error_pending",
641      (char*)&sqlite3_io_error_pending, TCL_LINK_INT);
642   Tcl_LinkVar(interp, "sqlite_io_error_persist",
643      (char*)&sqlite3_io_error_persist, TCL_LINK_INT);
644   Tcl_LinkVar(interp, "sqlite_io_error_hit",
645      (char*)&sqlite3_io_error_hit, TCL_LINK_INT);
646   Tcl_LinkVar(interp, "sqlite_io_error_hardhit",
647      (char*)&sqlite3_io_error_hardhit, TCL_LINK_INT);
648   Tcl_LinkVar(interp, "sqlite_diskfull_pending",
649      (char*)&sqlite3_diskfull_pending, TCL_LINK_INT);
650   Tcl_LinkVar(interp, "sqlite_diskfull",
651      (char*)&sqlite3_diskfull, TCL_LINK_INT);
652   Tcl_LinkVar(interp, "sqlite_pending_byte",
653      (char*)&sqlite3_pending_byte, TCL_LINK_INT);
654   Tcl_LinkVar(interp, "sqlite_pager_n_sort_bucket",
655      (char*)&sqlite3_pager_n_sort_bucket, TCL_LINK_INT);
656   return TCL_OK;
657 }
658