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Overview
| Comment: | Add two NEVER() operators in the sqlite3BtreeRowCountEst() routine. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | auto-analyze |
| Files: | files | file ages | folders |
| SHA1: |
7a959f6d1ea038988cdb4c02d6f37aba |
| User & Date: | drh 2017-02-23 02:15:33 |
Context
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2017-03-02
| ||
| 13:22 | Merge recent trunk enhancements. check-in: c60cdb47 user: drh tags: auto-analyze | |
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2017-02-23
| ||
| 02:15 | Add two NEVER() operators in the sqlite3BtreeRowCountEst() routine. check-in: 7a959f6d user: drh tags: auto-analyze | |
| 00:58 | Do a single OP_Expire at the very end of "PRAGMA optimize", and omit the OP_Expire on ANALYZE commands invoked by the pragma. check-in: 188300a3 user: drh tags: auto-analyze | |
Changes
Changes to src/btree.c.
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*/
i64 sqlite3BtreeRowCountEst(BtCursor *pCur){
i64 n;
u8 i;
assert( cursorOwnsBtShared(pCur) );
assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
if( pCur->eState!=CURSOR_VALID ) return -1;
if( pCur->apPage[pCur->iPage]->leaf==0 ) return -1;
for(n=1, i=0; i<=pCur->iPage; i++){
n *= pCur->apPage[i]->nCell;
}
return n;
}
/*
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> > > > | | > |
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*/
i64 sqlite3BtreeRowCountEst(BtCursor *pCur){
i64 n;
u8 i;
assert( cursorOwnsBtShared(pCur) );
assert( sqlite3_mutex_held(pCur->pBtree->db->mutex) );
/* Currently this interface is only called by the OP_IfSmaller
** opcode, and it that case the cursor will always be valid and
** will always point to a leaf node. */
if( NEVER(pCur->eState!=CURSOR_VALID) ) return -1;
if( NEVER(pCur->apPage[pCur->iPage]->leaf==0) ) return -1;
for(n=1, i=0; i<=pCur->iPage; i++){
n *= pCur->apPage[i]->nCell;
}
return n;
}
/*
|