NAME
sqlite3_snapshot_recover —
Recover
snapshots from a wal file
SYNOPSIS
int
sqlite3_snapshot_recover(
sqlite3 *db,
const char *zDb);
DESCRIPTION
If all connections disconnect from a database file but do not perform a
checkpoint, the existing wal file is opened along with the database file the
next time the database is opened. At this point it is only possible to
successfully call sqlite3_snapshot_open() to open the most recent snapshot of
the database (the one at the head of the wal file), even though the wal file
may contain other valid snapshots for which clients have sqlite3_snapshot
handles.
This function attempts to scan the wal file associated with database zDb of
database handle db and make all valid snapshots available to
sqlite3_snapshot_open(). It is an error if there is already a read transaction
open on the database, or if the database is not a wal mode database.
SQLITE_OK is returned if successful, or an SQLite error code otherwise.