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Change sqlite3BtreeBeginTrans() to return the BTREE_SCHEMA_COOKIE, for a

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small speed improvement when starting new transactions.

FossilOrigin-Name: a10662aa915ae2b5a78b3e10920350d32255b2d6b1a8aac0aba1ad173b07ed2b
This commit is contained in:
drh
2018-06-06 16:28:40 +00:00
parent 0cfd46a1ad
commit bb2d9b1bf1
10 changed files with 41 additions and 39 deletions
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6
src/backup.c
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@@ -382,7 +382,7 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
** before this function exits.
*/
if( rc==SQLITE_OK && 0==sqlite3BtreeIsInReadTrans(p->pSrc) ){
rc = sqlite3BtreeBeginTrans(p->pSrc, 0);
rc = sqlite3BtreeBeginTrans(p->pSrc, 0, 0);
bCloseTrans = 1;
}
@@ -398,10 +398,10 @@ int sqlite3_backup_step(sqlite3_backup *p, int nPage){
/* Lock the destination database, if it is not locked already. */
if( SQLITE_OK==rc && p->bDestLocked==0
&& SQLITE_OK==(rc = sqlite3BtreeBeginTrans(p->pDest, 2))
&& SQLITE_OK==(rc = sqlite3BtreeBeginTrans(p->pDest, 2,
(int*)&p->iDestSchema))
){
p->bDestLocked = 1;
sqlite3BtreeGetMeta(p->pDest, BTREE_SCHEMA_VERSION, &p->iDestSchema);
}
/* Do not allow backup if the destination database is in WAL mode