**
** WARNING:  Careless use of this command can corrupt a Fossil repository
** in ways that are unrecoverable.  Be sure you know what you are doing before
** running any SQL commands that modifies the repository database.
**
** The following extensions to the usual SQLite commands are provided:
**
**    content(X)                Return the contenxt of artifact X.  X can be a
**    content(X)                Return the content of artifact X.  X can be a
**                              SHA1 hash or prefix or a tag.
**
**    compress(X)               Compress text X.
**
**    decompress(X)             Decompress text X.  Undoes the work of
**                              compress(X).
**
**    checkin_mtime(X,Y)        Return the mtime for the file Y (a BLOB.RID)
**                              found in check-in X (another BLOB.RID value).
**
**    symbolic_name_to_rid(X)   Return a the BLOB.RID corresponding to symbolic
**    symbolic_name_to_rid(X)   Return the BLOB.RID corresponding to symbolic
**                              name X.
**
**    now()                     Return the number of seconds since 1970.
**
**    REGEXP                    The REGEXP operator works, unlike in
**                              standard SQLite.
**