Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Further refinements to the faststat1.c utility. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | est_count_pragma |
| Files: | files | file ages | folders |
| SHA1: |
b051fd19bc5b4e5805154b40beb70367 |
| User & Date: | drh 2016-10-25 19:21:18 |
Context
|
2016-10-25
| ||
| 19:39 | Simplifications to faststat1.c. Fix a bug in sqlite3MovetoProportional() for very large b-trees. (check-in: f7f78147 user: drh tags: est_count_pragma) | |
| 19:21 | Further refinements to the faststat1.c utility. (check-in: b051fd19 user: drh tags: est_count_pragma) | |
| 18:28 | Enhance faststat1.c to deal better with WITHOUT ROWID tables. (check-in: 65444f2e user: drh tags: est_count_pragma) | |
Changes
Changes to tool/faststat1.c.
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
...
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
|
apValue = (sqlite3_value**)&aCnt[nCol];
zRes = (char*)&apValue[nCol];
szRes = 30*(nCol+1);
iLimit = n>10000 ? 100 : 20000;
pStmt = db_prepare("PRAGMA btree_sample(\"%w\",0.0,%lld)",
zIdx, n*2);
for(i=0; i<N_SPAN; i++){
k = 0;
while( k<iLimit && (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
int iFirst;
for(iFirst=0; iFirst<nCol; iFirst++){
if( apValue[iFirst]==0 ) break;
if( columnNotEqual(pStmt, iFirst, apValue[iFirst]) ) break;
}
for(j=iFirst; j<nCol; j++){
aCnt[j]++;
sqlite3_value_free(apValue[j]);
apValue[j] = sqlite3_value_dup(sqlite3_column_value(pStmt,j));
}
nRow++;
k++;
}
sqlite3_finalize(pStmt);
if( rc!=SQLITE_ROW || i==N_SPAN-1 ) break;
pStmt = db_prepare("PRAGMA btree_sample(\"%w\",%g,%lld)",
zIdx, ((double)i)/(double)N_SPAN, n*2);
................................................................................
}else{
cmdlineError("unknown argument: %s", argv[i]);
}
}
if( zDb==0 ){
cmdlineError("database filename required");
}
rc = sqlite3_open(zDb, &g.db);
if( rc ){
cmdlineError("cannot open database file \"%s\"", zDb);
}
rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_master", 0, 0, &zErrMsg);
if( rc || zErrMsg ){
cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb);
}
|
|
>
>
>
|
|
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
...
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
|
apValue = (sqlite3_value**)&aCnt[nCol];
zRes = (char*)&apValue[nCol];
szRes = 30*(nCol+1);
iLimit = n>10000 ? 100 : 20000;
pStmt = db_prepare("PRAGMA btree_sample(\"%w\",0.0,%lld)",
zIdx, n*2);
for(i=0; i<=N_SPAN; i++){
k = 0;
while( k<iLimit && (rc = sqlite3_step(pStmt))==SQLITE_ROW ){
int iFirst;
for(iFirst=0; iFirst<nCol; iFirst++){
if( apValue[iFirst]==0 ) break;
if( columnNotEqual(pStmt, iFirst, apValue[iFirst]) ) break;
}
for(j=iFirst; j<nCol; j++){
aCnt[j]++;
sqlite3_value_free(apValue[j]);
apValue[j] = sqlite3_value_dup(sqlite3_column_value(pStmt,j));
}
if( k==0 && iFirst==nCol ){
nRow += n/(N_SPAN+1) - iLimit;
}
nRow++;
k++;
}
sqlite3_finalize(pStmt);
if( rc!=SQLITE_ROW || i==N_SPAN-1 ) break;
pStmt = db_prepare("PRAGMA btree_sample(\"%w\",%g,%lld)",
zIdx, ((double)i)/(double)N_SPAN, n*2);
................................................................................
}else{
cmdlineError("unknown argument: %s", argv[i]);
}
}
if( zDb==0 ){
cmdlineError("database filename required");
}
rc = sqlite3_open_v2(zDb, &g.db, SQLITE_OPEN_READONLY, 0);
if( rc ){
cmdlineError("cannot open database file \"%s\"", zDb);
}
rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_master", 0, 0, &zErrMsg);
if( rc || zErrMsg ){
cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb);
}
|