Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Fix typos in a comment in analyze.c. No code changes. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | sqlite_stat4 |
| Files: | files | file ages | folders |
| SHA1: |
812ed0c58fc5f729a2d4f16775fad672 |
| User & Date: | dan 2013-08-07 16:38:33 |
Context
|
2013-08-07
| ||
| 18:42 | Merge latest trunk changes with this branch. check-in: 08f74c45 user: dan tags: sqlite_stat4 | |
| 16:38 | Fix typos in a comment in analyze.c. No code changes. check-in: 812ed0c5 user: dan tags: sqlite_stat4 | |
| 16:15 | Change the way samples for the sqlite_stat4 table are collected. check-in: 13ed5ac1 user: dan tags: sqlite_stat4 | |
Changes
Changes to src/analyze.c.
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 |
UNUSED_PARAMETER(context);
UNUSED_PARAMETER(argc);
assert( p->nCol>0 );
assert( argc==(2 + 3*p->nCol) );
/* Figure out if this sample will be used. There are two reasons a
** sample may be used:
**
** 1. It may be a periodic sample. In this case set isPSample to true
** as well. Or,
**
** 2. Less than p->mxSample samples have been collected so far, or
**
** 3. It is more desirable than some other non-periodic sample that has
** already been collected. Samples are compared based on the values
** in the anEq array, starting from last (right-most index column)
** to first (left-most index column). If all elements of the anEq
** array are equal, samples are compared by hash value.
*/
h = p->iPrn = p->iPrn*1103515245 + 12345;
if( (nLt/p->nPSample)!=((nEq+nLt)/p->nPSample) ){
doInsert = isPSample = 1;
}else if( p->nSample<p->mxSample ){
doInsert = 1;
}else{
|
| > > > |
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 |
UNUSED_PARAMETER(context); UNUSED_PARAMETER(argc); assert( p->nCol>0 ); assert( argc==(2 + 3*p->nCol) ); /* Figure out if this sample will be used. There are three reasons a ** sample may be used: ** ** 1. It may be a periodic sample. In this case set isPSample to true ** as well. Or, ** ** 2. Less than p->mxSample samples have been collected so far, or ** ** 3. It is more desirable than some other non-periodic sample that has ** already been collected. Samples are compared based on the values ** in the anEq array, starting from last (right-most index column) ** to first (left-most index column). If all elements of the anEq ** array are equal, samples are compared by hash value. ** ** For both the contents of the anEq[] array and the hash value, ** larger values are considered more desirable. */ h = p->iPrn = p->iPrn*1103515245 + 12345; if( (nLt/p->nPSample)!=((nEq+nLt)/p->nPSample) ){ doInsert = isPSample = 1; }else if( p->nSample<p->mxSample ){ doInsert = 1; }else{ |