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Overview
| Comment: | Add an ALWAYS() around a branch in sqlite3BtreeSkipNext() that we believe must always be true. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
12be361a532df0c22a7e4d97658b82a6 |
| User & Date: | drh 2018-07-09 20:41:39 |
Context
|
2018-07-09
| ||
| 20:58 | Add a comment to restriction (6) of the push-down optimization. No changes to code. (check-in: 0c8a2f25 user: drh tags: trunk) | |
| 20:41 | Add an ALWAYS() around a branch in sqlite3BtreeSkipNext() that we believe must always be true. (check-in: 12be361a user: drh tags: trunk) | |
| 18:55 | Avoid leaving view-definitions with an incomplete set of column names/types in the in-memory schema if an OOM strikes while allocating the same. (check-in: 1ddbb537 user: dan tags: trunk) | |
Changes
Changes to src/btree.c.
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/*
** This function is a no-op if cursor pCur does not point to a valid row.
** Otherwise, if pCur is valid, configure it so that the next call to
** sqlite3BtreeNext() is a no-op.
*/
#ifndef SQLITE_OMIT_WINDOWFUNC
void sqlite3BtreeSkipNext(BtCursor *pCur){
if( pCur->eState==CURSOR_VALID ){
pCur->eState = CURSOR_SKIPNEXT;
pCur->skipNext = 1;
}
}
#endif /* SQLITE_OMIT_WINDOWFUNC */
/* Move the cursor to the last entry in the table. Return SQLITE_OK
|
> > > | |
5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 |
/*
** This function is a no-op if cursor pCur does not point to a valid row.
** Otherwise, if pCur is valid, configure it so that the next call to
** sqlite3BtreeNext() is a no-op.
*/
#ifndef SQLITE_OMIT_WINDOWFUNC
void sqlite3BtreeSkipNext(BtCursor *pCur){
/* We believe that the cursor must always be in the valid state when
** this routine is called, but the proof is difficult, so we add an
** ALWaYS() test just in case we are wrong. */
if( ALWAYS(pCur->eState==CURSOR_VALID) ){
pCur->eState = CURSOR_SKIPNEXT;
pCur->skipNext = 1;
}
}
#endif /* SQLITE_OMIT_WINDOWFUNC */
/* Move the cursor to the last entry in the table. Return SQLITE_OK
|