/*
** Rerun the compilation of a statement after a schema change.
**
** If the statement is successfully recompiled, return SQLITE_OK. Otherwise,
** if the statement cannot be recompiled because another connection has
** locked the sqlite3_master table, return SQLITE_LOCKED. If any other error
** occurs, return SQLITE_SCHEMA.
*/
int sqlite3Reprepare(Vdbe *p){
int rc;
sqlite3_stmt *pNew;
const char *zSql;
sqlite3 *db;
assert( sqlite3_mutex_held(sqlite3VdbeDb(p)->mutex) );
zSql = sqlite3_sql((sqlite3_stmt *)p);
assert( zSql!=0 ); /* Reprepare only called for prepare_v2() statements */
db = sqlite3VdbeDb(p);
assert( sqlite3_mutex_held(db->mutex) );
rc = sqlite3LockAndPrepare(db, zSql, -1, 0, &pNew, 0);
if( rc ){
if( rc==SQLITE_NOMEM ){
db->mallocFailed = 1;
}
assert( pNew==0 );
return (rc==SQLITE_LOCKED) ? SQLITE_LOCKED : SQLITE_SCHEMA;
}else{
assert( pNew!=0 );
}
sqlite3VdbeSwap((Vdbe*)pNew, p);
sqlite3TransferBindings(pNew, (sqlite3_stmt*)p);
sqlite3VdbeResetStepResult((Vdbe*)pNew);
sqlite3VdbeFinalize((Vdbe*)pNew);
return SQLITE_OK;
}
/*
** Deprecated external interface. Internal/core SQLite code
** should call sqlite3TransferBindings.
**
** It is misuse to call this routine with statements from different
** database connections. But as this is a deprecated interface, we
** will not bother to check for that condition.
**
** If the two statements contain a different number of bindings, then
** an SQLITE_ERROR is returned. Nothing else can go wrong, so otherwise
** SQLITE_OK is returned.
*/
int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
Vdbe *pFrom = (Vdbe*)pFromStmt;
Vdbe *pTo = (Vdbe*)pToStmt;
if( pFrom->nVar!=pTo->nVar ){
return SQLITE_ERROR;
}
if( pTo->isPrepareV2 && pTo->expmask ){
pTo->expired = 1;
}
if( pFrom->isPrepareV2 && pFrom->expmask ){
pFrom->expired = 1;
}
return sqlite3TransferBindings(pFromStmt, pToStmt);
}
/*
** Deprecated external interface. Internal/core SQLite code
** should call sqlite3TransferBindings.
*/
int sqlite3_transfer_bindings(sqlite3_stmt *pFromStmt, sqlite3_stmt *pToStmt){
return sqlite3TransferBindings(pFromStmt, pToStmt);
}
