/ Check-in [64f97530ad]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Where possible, avoid loading all schemas into memory for PRAGMA statements.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | reuse-schema
Files: files | file ages | folders
SHA3-256: 64f97530ad387655767b5205fb9a9c723210cd4975176ab6fb71bca0cb585a74
User & Date: dan 2019-02-25 17:54:23
Wiki:reuse-schema
Context
2019-02-25
18:07
Merge latest trunk changes into this branch. check-in: 5c1cf30859 user: dan tags: reuse-schema
17:54
Where possible, avoid loading all schemas into memory for PRAGMA statements. check-in: 64f97530ad user: dan tags: reuse-schema
2019-02-22
17:44
Merge latest trunk changes into this branch. check-in: 001771afd0 user: dan tags: reuse-schema
Changes
Hide Diffs Unified Diffs Show Whitespace Changes Patch

Changes to src/build.c.

304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
      && DbHasProperty(db, iDb, DB_SchemaLoaded)==0 
      && (db->init.busy==0 || (iDb!=1 && db->init.iDb==1))
  ){
    struct sqlite3InitInfo sv = db->init;
    memset(&db->init, 0, sizeof(struct sqlite3InitInfo));
    rc = sqlite3InitOne(db, iDb, pzErr, 0);
    db->init = sv;
    *pbUnload = (rc==SQLITE_OK && (iDb!=1));
  }
  return rc;
}

/*
** Locate the in-memory structure that describes a particular database
** table given the name of that table and (optionally) the name of the







|







304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
      && DbHasProperty(db, iDb, DB_SchemaLoaded)==0 
      && (db->init.busy==0 || (iDb!=1 && db->init.iDb==1))
  ){
    struct sqlite3InitInfo sv = db->init;
    memset(&db->init, 0, sizeof(struct sqlite3InitInfo));
    rc = sqlite3InitOne(db, iDb, pzErr, 0);
    db->init = sv;
    if( pbUnload ) *pbUnload = (rc==SQLITE_OK && (iDb!=1));
  }
  return rc;
}

/*
** Locate the in-memory structure that describes a particular database
** table given the name of that table and (optionally) the name of the

Changes to src/callback.c.

790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
    if( i!=1 ){
      Db *pDb = &db->aDb[i];
      if( pDb->pSPool && DbHasProperty(db,i,DB_SchemaLoaded) ){
        schemaRelease(db, pDb);
      }
    }
  }
  db->flags &= ~DBFLAG_FreeSchema;
  sqlite3_mutex_leave( sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER) );
}

/*
** Release any sharable schema held by connection iDb of database handle
** db. Db.pSchema is left pointing to the static, empty, Schema object
** owned by the schema-pool.







|







790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
    if( i!=1 ){
      Db *pDb = &db->aDb[i];
      if( pDb->pSPool && DbHasProperty(db,i,DB_SchemaLoaded) ){
        schemaRelease(db, pDb);
      }
    }
  }
  db->mDbFlags &= ~DBFLAG_FreeSchema;
  sqlite3_mutex_leave( sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER) );
}

/*
** Release any sharable schema held by connection iDb of database handle
** db. Db.pSchema is left pointing to the static, empty, Schema object
** owned by the schema-pool.

Changes to src/pragma.c.

416
417
418
419
420
421
422





423
424

425
426
427
428
429
430
431
....
1798
1799
1800
1801
1802
1803
1804
1805

1806
1807
1808
1809
1810
1811
1812
1813
1814

  /* Locate the pragma in the lookup table */
  pPragma = pragmaLocate(zLeft);
  if( pPragma==0 ) goto pragma_out;

  /* Make sure the database schema is loaded if the pragma requires that */
  if( (pPragma->mPragFlg & PragFlg_NeedSchema)!=0 ){





    if( sqlite3ReadSchema(pParse) ) goto pragma_out;
  }


  /* Register the result column names for pragmas that return results */
  if( (pPragma->mPragFlg & PragFlg_NoColumns)==0 
   && ((pPragma->mPragFlg & PragFlg_NoColumns1)==0 || zRight==0)
  ){
    setPragmaResultColumnNames(v, pPragma);
  }
................................................................................
  ** the schema-version is potentially dangerous and may lead to program
  ** crashes or database corruption. Use with caution!
  **
  ** The user-version is not used internally by SQLite. It may be used by
  ** applications for any purpose.
  */
  case PragTyp_HEADER_VALUE: {
    int iCookie = pPragma->iArg;  /* Which cookie to read or write */

    sqlite3VdbeUsesBtree(v, iDb);
    if( zRight && (pPragma->mPragFlg & PragFlg_ReadOnly)==0 ){
      /* Write the specified cookie value */
      static const VdbeOpList setCookie[] = {
        { OP_Transaction,    0,  1,  0},    /* 0 */
        { OP_SetCookie,      0,  0,  0},    /* 1 */
      };
      VdbeOp *aOp;
      sqlite3VdbeVerifyNoMallocRequired(v, ArraySize(setCookie));







>
>
>
>
>
|
|
>







 







|
>

|







416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
....
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821

  /* Locate the pragma in the lookup table */
  pPragma = pragmaLocate(zLeft);
  if( pPragma==0 ) goto pragma_out;

  /* Make sure the database schema is loaded if the pragma requires that */
  if( (pPragma->mPragFlg & PragFlg_NeedSchema)!=0 ){
    if( IsReuseSchema(db) && (zDb || (pPragma->mPragFlg & PragFlg_OneSchema)) ){
      assert( iDb>=0 && iDb<db->nDb );
      pParse->rc = sqlite3SchemaLoad(db, iDb, 0, &pParse->zErrMsg);
      if( pParse->rc ) goto pragma_out;
    }else{
      if( sqlite3ReadSchema(pParse) ) goto pragma_out;
    }
  }

  /* Register the result column names for pragmas that return results */
  if( (pPragma->mPragFlg & PragFlg_NoColumns)==0 
   && ((pPragma->mPragFlg & PragFlg_NoColumns1)==0 || zRight==0)
  ){
    setPragmaResultColumnNames(v, pPragma);
  }
................................................................................
  ** the schema-version is potentially dangerous and may lead to program
  ** crashes or database corruption. Use with caution!
  **
  ** The user-version is not used internally by SQLite. It may be used by
  ** applications for any purpose.
  */
  case PragTyp_HEADER_VALUE: {
    int iCookie;                  /* Which cookie to read or write */
    iCookie = pPragma->iArg & PRAGMA_HEADER_VALUE_MASK;     
    sqlite3VdbeUsesBtree(v, iDb);
    if( zRight && (pPragma->iArg & PRAGMA_HEADER_VALUE_READONLY)==0 ){
      /* Write the specified cookie value */
      static const VdbeOpList setCookie[] = {
        { OP_Transaction,    0,  1,  0},    /* 0 */
        { OP_SetCookie,      0,  0,  0},    /* 1 */
      };
      VdbeOp *aOp;
      sqlite3VdbeVerifyNoMallocRequired(v, ArraySize(setCookie));

Changes to src/pragma.h.

51
52
53
54
55
56
57
58
59
60
61
62







63
64
65
66
67
68
69
...
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
...
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
...
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
...
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
...
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
...
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
...
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
...
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
...
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
...
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
...
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
#define PragTyp_LOCK_STATUS                   43
#define PragTyp_STATS                         44

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_ReadOnly   0x08 /* Read-only HEADER_VALUE */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
#define PragFlg_Result1    0x20 /* Acts as query when has one argument */
#define PragFlg_SchemaOpt  0x40 /* Schema restricts name search if present */
#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */








/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "id",          /* Used by: foreign_key_list */
................................................................................
  /* ePragFlg:  */ PragFlg_NoColumns1|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_APPLICATION_ID },
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
 {/* zName:     */ "auto_vacuum",
  /* ePragTyp:  */ PragTyp_AUTO_VACUUM,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_AUTOMATIC_INDEX)
 {/* zName:     */ "automatic_index",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 46, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "cache_spill",
  /* ePragTyp:  */ PragTyp_CACHE_SPILL,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
................................................................................
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "data_version",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0,
  /* ColNames:  */ 31, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
  /* ColNames:  */ 0, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ForeignKeys },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "freelist_count",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_ReadOnly|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_FREE_PAGE_COUNT },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "full_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullColNames },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_IgnoreChecks },
#endif
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
 {/* zName:     */ "incremental_vacuum",
  /* ePragTyp:  */ PragTyp_INCREMENTAL_VACUUM,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_NoColumns,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_Result1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "journal_mode",
  /* ePragTyp:  */ PragTyp_JOURNAL_MODE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "journal_size_limit",
  /* ePragTyp:  */ PragTyp_JOURNAL_SIZE_LIMIT,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "max_page_count",
  /* ePragTyp:  */ PragTyp_PAGE_COUNT,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "mmap_size",
  /* ePragTyp:  */ PragTyp_MMAP_SIZE,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "page_count",
  /* ePragTyp:  */ PragTyp_PAGE_COUNT,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "page_size",
  /* ePragTyp:  */ PragTyp_PAGE_SIZE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
 {/* zName:     */ "wal_autocheckpoint",
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema,
  /* ColNames:  */ 38, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema|SQLITE_NoSchemaError },
#endif
};
/* Number of pragmas: 62 on by default, 81 total. */







|




>
>
>
>
>
>
>







 







|







 







|







 







|

|




|






|







 







|






|







 







|

|







 







|







 







|







 







|







 







|







 







|






|







 







|












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
...
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
...
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
...
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
...
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
...
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
...
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
...
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
...
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
...
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
...
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
...
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
#define PragTyp_LOCK_STATUS                   43
#define PragTyp_STATS                         44

/* Property flags associated with various pragma. */
#define PragFlg_NeedSchema 0x01 /* Force schema load before running */
#define PragFlg_NoColumns  0x02 /* OP_ResultRow called with zero columns */
#define PragFlg_NoColumns1 0x04 /* zero columns if RHS argument is present */
#define PragFlg_OneSchema  0x08 /* Only a single schema required */
#define PragFlg_Result0    0x10 /* Acts as query when no argument */
#define PragFlg_Result1    0x20 /* Acts as query when has one argument */
#define PragFlg_SchemaOpt  0x40 /* Schema restricts name search if present */
#define PragFlg_SchemaReq  0x80 /* Schema required - "main" is default */

/* For PragTyp_HEADER_VALUE pragmas the Pragma.iArg value is set
** to the index of the header field to access (always 10 or less).
** Ored with HEADER_VALUE_READONLY if the field is read only. */
#define PRAGMA_HEADER_VALUE_READONLY 0x0100
#define PRAGMA_HEADER_VALUE_MASK 0x00FF


/* Names of columns for pragmas that return multi-column result
** or that return single-column results where the name of the
** result column is different from the name of the pragma
*/
static const char *const pragCName[] = {
  /*   0 */ "id",          /* Used by: foreign_key_list */
................................................................................
  /* ePragFlg:  */ PragFlg_NoColumns1|PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_APPLICATION_ID },
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
 {/* zName:     */ "auto_vacuum",
  /* ePragTyp:  */ PragTyp_AUTO_VACUUM,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_AUTOMATIC_INDEX)
 {/* zName:     */ "automatic_index",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ePragTyp:  */ PragTyp_BUSY_TIMEOUT,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 46, 1,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "cache_size",
  /* ePragTyp:  */ PragTyp_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "cache_spill",
  /* ePragTyp:  */ PragTyp_CACHE_SPILL,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
................................................................................
  /* ePragFlg:  */ PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "data_version",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_DATA_VERSION|PRAGMA_HEADER_VALUE_READONLY },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "database_list",
  /* ePragTyp:  */ PragTyp_DATABASE_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_OneSchema,
  /* ColNames:  */ 35, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)
 {/* zName:     */ "default_cache_size",
  /* ePragTyp:  */ PragTyp_DEFAULT_CACHE_SIZE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1|PragFlg_OneSchema,
  /* ColNames:  */ 45, 1,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "defer_foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_key_check",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_CHECK,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_OneSchema,
  /* ColNames:  */ 31, 4,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FOREIGN_KEY)
 {/* zName:     */ "foreign_key_list",
  /* ePragTyp:  */ PragTyp_FOREIGN_KEY_LIST,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt|PragFlg_OneSchema,
  /* ColNames:  */ 0, 8,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
 {/* zName:     */ "foreign_keys",
  /* ePragTyp:  */ PragTyp_FLAG,
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_ForeignKeys },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)
 {/* zName:     */ "freelist_count",
  /* ePragTyp:  */ PragTyp_HEADER_VALUE,
  /* ePragFlg:  */ PragFlg_Result0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ BTREE_FREE_PAGE_COUNT|PRAGMA_HEADER_VALUE_READONLY },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "full_column_names",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_FullColNames },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_IgnoreChecks },
#endif
#endif
#if !defined(SQLITE_OMIT_AUTOVACUUM)
 {/* zName:     */ "incremental_vacuum",
  /* ePragTyp:  */ PragTyp_INCREMENTAL_VACUUM,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_NoColumns|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "index_info",
  /* ePragTyp:  */ PragTyp_INDEX_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_Result1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "journal_mode",
  /* ePragTyp:  */ PragTyp_JOURNAL_MODE,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "journal_size_limit",
  /* ePragTyp:  */ PragTyp_JOURNAL_SIZE_LIMIT,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
 {/* zName:     */ "locking_mode",
  /* ePragTyp:  */ PragTyp_LOCKING_MODE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "max_page_count",
  /* ePragTyp:  */ PragTyp_PAGE_COUNT,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "mmap_size",
  /* ePragTyp:  */ PragTyp_MMAP_SIZE,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ePragTyp:  */ PragTyp_OPTIMIZE,
  /* ePragFlg:  */ PragFlg_Result1|PragFlg_NeedSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "page_count",
  /* ePragTyp:  */ PragTyp_PAGE_COUNT,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "page_size",
  /* ePragTyp:  */ PragTyp_PAGE_SIZE,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
................................................................................
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_SqlTrace },
#endif
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)
 {/* zName:     */ "stats",
  /* ePragTyp:  */ PragTyp_STATS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_OneSchema,
  /* ColNames:  */ 21, 5,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_PAGER_PRAGMAS)
 {/* zName:     */ "synchronous",
  /* ePragTyp:  */ PragTyp_SYNCHRONOUS,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result0|PragFlg_SchemaReq|PragFlg_NoColumns1|PragFlg_OneSchema,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
 {/* zName:     */ "table_info",
  /* ePragTyp:  */ PragTyp_TABLE_INFO,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_Result1|PragFlg_SchemaOpt,
................................................................................
 {/* zName:     */ "wal_autocheckpoint",
  /* ePragTyp:  */ PragTyp_WAL_AUTOCHECKPOINT,
  /* ePragFlg:  */ 0,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ 0 },
 {/* zName:     */ "wal_checkpoint",
  /* ePragTyp:  */ PragTyp_WAL_CHECKPOINT,
  /* ePragFlg:  */ PragFlg_NeedSchema|PragFlg_OneSchema,
  /* ColNames:  */ 38, 3,
  /* iArg:      */ 0 },
#endif
#if !defined(SQLITE_OMIT_FLAG_PRAGMAS)
 {/* zName:     */ "writable_schema",
  /* ePragTyp:  */ PragTyp_FLAG,
  /* ePragFlg:  */ PragFlg_Result0|PragFlg_NoColumns1,
  /* ColNames:  */ 0, 0,
  /* iArg:      */ SQLITE_WriteSchema|SQLITE_NoSchemaError },
#endif
};
/* Number of pragmas: 62 on by default, 81 total. */

Changes to test/reuse4.test.

110
111
112
113
114
115
116
117

















































118
119
    SELECT * FROM main.x3; SELECT 'xxx';
  } {
    3 3 4 4 5 5 6 6 7 7 8 8 3 3 5 5 7 7 xxx 
    123 456 xxx 
    xxx
  }
}


















































finish_test









>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>


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
    SELECT * FROM main.x3; SELECT 'xxx';
  } {
    3 3 4 4 5 5 6 6 7 7 8 8 3 3 5 5 7 7 xxx 
    123 456 xxx 
    xxx
  }
}

#-------------------------------------------------------------------------
# Test some PRAGMA statements with shared-schema connections.
#
reset_db
do_execsql_test 2.0 {
  CREATE TABLE t1(a, b, c);
  CREATE INDEX t1abc ON t1(a, b, c);
}

foreach {tn pragma nSchema nDelete} {
  1 "PRAGMA synchronous = OFF"     1 0
  2 "PRAGMA cache_size = 200"      1 0
  3 "PRAGMA aux2.integrity_check"  1 0
  4 "PRAGMA      integrity_check"  1 5
  5 "PRAGMA index_info=t1abc"      1 5
  6 "PRAGMA aux3.index_info=t1abc" 1 0
  7 "PRAGMA journal_mode"          1 0
  8 "PRAGMA aux2.wal_checkpoint"   1 0
  9 "PRAGMA wal_checkpoint"        1 0
} {
  do_test 2.$tn.1 {
    catch { db close }
    catch { db2 close }
    for {set i 1} {$i < 6} {incr i} {
      forcedelete "test.db$i" "test.db${i}-wal" "test.db${i}-journal"
      forcecopy test.db test.db$i
    }
    sqlite3 db2 test.db -shared-schema 1
    for {set i 1} {$i < 6} {incr i} {
      execsql "ATTACH 'test.db$i' AS aux$i" db2
    }
  } {}

  sqlite3 db test.db
  register_schemapool_module db

  do_test 2.$tn.2 {
    execsql $pragma db2
    execsql { SELECT 'nschema='||nschema, 'ndelete='||nDelete FROM schemapool }
  } "nschema=$nSchema ndelete=$nDelete"

  do_test 2.$tn.3 {
    execsql {
      SELECT * FROM main.t1,aux1.t1,aux2.t1,aux3.t1,aux4.t1,aux5.t1
    } db2
    execsql { SELECT 'nschema=' || nschema, 'nref=' || nref FROM schemapool }
  } "nschema=6 nref=6"
}

finish_test

Changes to tool/mkpragmatab.tcl.

8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
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
...
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
...
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
...
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
...
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
...
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
...
528
529
530
531
532
533
534






535
536
537
538
539
540
541
# the lookup table needed for pragma name lookup in the pragma.c module.
# Then add the extra "case PragTyp_XXXXX:" and subsequent code for the
# new pragma in ../src/pragma.c.
#

# Flag meanings:
set flagMeaning(NeedSchema) {Force schema load before running}
set flagMeaning(ReadOnly)   {Read-only HEADER_VALUE}
set flagMeaning(Result0)    {Acts as query when no argument}
set flagMeaning(Result1)    {Acts as query when has one argument}
set flagMeaning(SchemaReq)  {Schema required - "main" is default}
set flagMeaning(SchemaOpt)  {Schema restricts name search if present}
set flagMeaning(NoColumns)  {OP_ResultRow called with zero columns}
set flagMeaning(NoColumns1) {zero columns if RHS argument is present}

................................................................................
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)

  NAME: cell_size_check
  TYPE: FLAG
  ARG:  SQLITE_CellSizeCk

  NAME: default_cache_size
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  COLS: cache_size
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)

  NAME: page_size
  FLAG: Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: secure_delete
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: page_count
  FLAG: NeedSchema Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: max_page_count
  TYPE: PAGE_COUNT
  FLAG: NeedSchema Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: locking_mode
  FLAG: Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: journal_mode
  FLAG: NeedSchema Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: journal_size_limit
  FLAG: Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: cache_size
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: mmap_size
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: auto_vacuum
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_AUTOVACUUM)

  NAME: incremental_vacuum
  FLAG: NeedSchema NoColumns
  IF:   !defined(SQLITE_OMIT_AUTOVACUUM)

  NAME: temp_store
  FLAG: Result0 NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: temp_store_directory
................................................................................
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN

  NAME: lock_proxy_file
  FLAG: NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE

  NAME: synchronous
  FLAG: NeedSchema Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: table_info
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  0
  COLS: cid name type notnull dflt_value pk
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................
  TYPE: TABLE_INFO
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  1
  COLS: cid name type notnull dflt_value pk hidden
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: stats
  FLAG: NeedSchema Result0 SchemaReq
  COLS: tbl idx wdth hght flgs
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)

  NAME: index_info
  TYPE: INDEX_INFO
  ARG:  0
  FLAG: NeedSchema Result1 SchemaOpt
................................................................................

  NAME: index_list
  FLAG: NeedSchema Result1 SchemaOpt
  COLS: seq name unique origin partial
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: database_list
  FLAG: NeedSchema Result0
  COLS: seq name file
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: function_list
  FLAG: Result0
  COLS: name builtin
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................

  NAME: collation_list
  FLAG: Result0
  COLS: seq name
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: foreign_key_list
  FLAG: NeedSchema Result1 SchemaOpt
  COLS: id seq table from to on_update on_delete match
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY)

  NAME: foreign_key_check
  FLAG: NeedSchema Result0
  COLS: table rowid parent fkid
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)

  NAME: parser_trace
  TYPE: FLAG
  ARG:  SQLITE_ParserTrace
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)
................................................................................
  TYPE: HEADER_VALUE
  ARG:  BTREE_USER_VERSION
  FLAG: NoColumns1 Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: data_version
  TYPE: HEADER_VALUE
  ARG:  BTREE_DATA_VERSION
  FLAG: ReadOnly Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: freelist_count
  TYPE: HEADER_VALUE
  ARG:  BTREE_FREE_PAGE_COUNT
  FLAG: ReadOnly Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: application_id
  TYPE: HEADER_VALUE
  ARG:  BTREE_APPLICATION_ID
  FLAG: NoColumns1 Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: compile_options
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)

  NAME: wal_checkpoint
  FLAG: NeedSchema
  COLS: busy log checkpointed
  IF:   !defined(SQLITE_OMIT_WAL)

  NAME: wal_autocheckpoint
  IF:   !defined(SQLITE_OMIT_WAL)

  NAME: shrink_memory
................................................................................
puts $fd "\n/* Property flags associated with various pragma. */"
set fv 1
foreach f [lsort [array names allflags]] {
  puts $fd [format {#define PragFlg_%-10s 0x%02x /* %s */} \
             $f $fv $flagMeaning($f)]
  set fv [expr {$fv*2}]
}







# Sort the column lists so that longer column lists occur first
#
proc colscmp {a b} {
  return [expr {[llength $b] - [llength $a]}]
}
set cols_list [lsort -command colscmp $cols_list]







|







 







|












|




|







|







|






|



|







 







|







 







|







 







|







 







|




|







 







|
|




|
|













|







 







>
>
>
>
>
>







8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
...
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
...
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
...
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
...
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
...
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
...
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
...
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
# the lookup table needed for pragma name lookup in the pragma.c module.
# Then add the extra "case PragTyp_XXXXX:" and subsequent code for the
# new pragma in ../src/pragma.c.
#

# Flag meanings:
set flagMeaning(NeedSchema) {Force schema load before running}
set flagMeaning(OneSchema)  {Only a single schema required}
set flagMeaning(Result0)    {Acts as query when no argument}
set flagMeaning(Result1)    {Acts as query when has one argument}
set flagMeaning(SchemaReq)  {Schema required - "main" is default}
set flagMeaning(SchemaOpt)  {Schema restricts name search if present}
set flagMeaning(NoColumns)  {OP_ResultRow called with zero columns}
set flagMeaning(NoColumns1) {zero columns if RHS argument is present}

................................................................................
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)

  NAME: cell_size_check
  TYPE: FLAG
  ARG:  SQLITE_CellSizeCk

  NAME: default_cache_size
  FLAG: NeedSchema Result0 SchemaReq NoColumns1 OneSchema
  COLS: cache_size
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && !defined(SQLITE_OMIT_DEPRECATED)

  NAME: page_size
  FLAG: Result0 SchemaReq NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: secure_delete
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: page_count
  FLAG: NeedSchema Result0 SchemaReq OneSchema
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: max_page_count
  TYPE: PAGE_COUNT
  FLAG: NeedSchema Result0 SchemaReq OneSchema
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: locking_mode
  FLAG: Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: journal_mode
  FLAG: NeedSchema Result0 SchemaReq OneSchema
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: journal_size_limit
  FLAG: Result0 SchemaReq
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: cache_size
  FLAG: NeedSchema Result0 SchemaReq NoColumns1 OneSchema
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: mmap_size
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: auto_vacuum
  FLAG: NeedSchema Result0 SchemaReq NoColumns1 OneSchema
  IF:   !defined(SQLITE_OMIT_AUTOVACUUM)

  NAME: incremental_vacuum
  FLAG: NeedSchema NoColumns OneSchema
  IF:   !defined(SQLITE_OMIT_AUTOVACUUM)

  NAME: temp_store
  FLAG: Result0 NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: temp_store_directory
................................................................................
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_OS_WIN

  NAME: lock_proxy_file
  FLAG: NoColumns1
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS) && SQLITE_ENABLE_LOCKING_STYLE

  NAME: synchronous
  FLAG: NeedSchema Result0 SchemaReq NoColumns1 OneSchema
  IF:   !defined(SQLITE_OMIT_PAGER_PRAGMAS)

  NAME: table_info
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  0
  COLS: cid name type notnull dflt_value pk
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................
  TYPE: TABLE_INFO
  FLAG: NeedSchema Result1 SchemaOpt
  ARG:  1
  COLS: cid name type notnull dflt_value pk hidden
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: stats
  FLAG: NeedSchema Result0 SchemaReq OneSchema
  COLS: tbl idx wdth hght flgs
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS) && defined(SQLITE_DEBUG)

  NAME: index_info
  TYPE: INDEX_INFO
  ARG:  0
  FLAG: NeedSchema Result1 SchemaOpt
................................................................................

  NAME: index_list
  FLAG: NeedSchema Result1 SchemaOpt
  COLS: seq name unique origin partial
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: database_list
  FLAG: NeedSchema Result0 OneSchema
  COLS: seq name file
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: function_list
  FLAG: Result0
  COLS: name builtin
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)
................................................................................

  NAME: collation_list
  FLAG: Result0
  COLS: seq name
  IF:   !defined(SQLITE_OMIT_SCHEMA_PRAGMAS)

  NAME: foreign_key_list
  FLAG: NeedSchema Result1 SchemaOpt OneSchema
  COLS: id seq table from to on_update on_delete match
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY)

  NAME: foreign_key_check
  FLAG: NeedSchema Result0 OneSchema
  COLS: table rowid parent fkid
  IF:   !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)

  NAME: parser_trace
  TYPE: FLAG
  ARG:  SQLITE_ParserTrace
  IF:   !defined(SQLITE_OMIT_FLAG_PRAGMAS)
................................................................................
  TYPE: HEADER_VALUE
  ARG:  BTREE_USER_VERSION
  FLAG: NoColumns1 Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: data_version
  TYPE: HEADER_VALUE
  ARG:  BTREE_DATA_VERSION|PRAGMA_HEADER_VALUE_READONLY
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: freelist_count
  TYPE: HEADER_VALUE
  ARG:  BTREE_FREE_PAGE_COUNT|PRAGMA_HEADER_VALUE_READONLY
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: application_id
  TYPE: HEADER_VALUE
  ARG:  BTREE_APPLICATION_ID
  FLAG: NoColumns1 Result0
  IF:   !defined(SQLITE_OMIT_SCHEMA_VERSION_PRAGMAS)

  NAME: compile_options
  FLAG: Result0
  IF:   !defined(SQLITE_OMIT_COMPILEOPTION_DIAGS)

  NAME: wal_checkpoint
  FLAG: NeedSchema OneSchema
  COLS: busy log checkpointed
  IF:   !defined(SQLITE_OMIT_WAL)

  NAME: wal_autocheckpoint
  IF:   !defined(SQLITE_OMIT_WAL)

  NAME: shrink_memory
................................................................................
puts $fd "\n/* Property flags associated with various pragma. */"
set fv 1
foreach f [lsort [array names allflags]] {
  puts $fd [format {#define PragFlg_%-10s 0x%02x /* %s */} \
             $f $fv $flagMeaning($f)]
  set fv [expr {$fv*2}]
}

puts $fd "\n/* For PragTyp_HEADER_VALUE pragmas the Pragma.iArg value is set"
puts $fd "** to the index of the header field to access (always 10 or less)."
puts $fd "** Ored with HEADER_VALUE_READONLY if the field is read only. */"
puts $fd "#define PRAGMA_HEADER_VALUE_READONLY 0x0100"
puts $fd "#define PRAGMA_HEADER_VALUE_MASK 0x00FF\n"

# Sort the column lists so that longer column lists occur first
#
proc colscmp {a b} {
  return [expr {[llength $b] - [llength $a]}]
}
set cols_list [lsort -command colscmp $cols_list]