database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

Experimental changes that permit read operations to continue after a

Browse Source 
ROLLBACK, as long as the schema is unchanged.

FossilOrigin-Name: fa6e6a9ae276cad60e9a4abc1bc23cf2809ea786
This commit is contained in:
drh
2014-11-11 01:33:57 +00:00
parent de58f4fe7f
commit 47b7fc7843
16 changed files with 95 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/vdbe.c
View File

@@ -2825,11 +2825,16 @@ case OP_Savepoint: {
db->isTransactionSavepoint = 0;
rc = p->rc;
}else{
int isSchemaChange;
iSavepoint = db->nSavepoint - iSavepoint - 1;
if( p1==SAVEPOINT_ROLLBACK ){
isSchemaChange = (db->flags & SQLITE_InternChanges)!=0;
for(ii=0; ii<db->nDb; ii++){
sqlite3BtreeTripAllCursors(db->aDb[ii].pBt, SQLITE_ABORT);
sqlite3BtreeTripAllCursors(db->aDb[ii].pBt, SQLITE_ABORT,
isSchemaChange==0);
}
}else{
isSchemaChange = 0;
}
for(ii=0; ii<db->nDb; ii++){
rc = sqlite3BtreeSavepoint(db->aDb[ii].pBt, p1, iSavepoint);
@@ -2837,7 +2842,7 @@ case OP_Savepoint: {
goto abort_due_to_error;
}
}
if( p1==SAVEPOINT_ROLLBACK && (db->flags&SQLITE_InternChanges)!=0 ){
if( isSchemaChange ){
sqlite3ExpirePreparedStatements(db);
sqlite3ResetAllSchemasOfConnection(db);
db->flags = (db->flags | SQLITE_InternChanges);
@@ -3234,7 +3239,7 @@ case OP_OpenWrite: {
|| p->readOnly==0 );
if( p->expired ){
rc = SQLITE_ABORT;
rc = SQLITE_ABORT_ROLLBACK;
break;
}