}else if( argc==2 ){
    zP = (const char*)sqlite3_value_text(argv[1]);
    if( zP ) sqlite3_result_text(context, zP, -1, SQLITE_TRANSIENT);
  }
}

/*
** This is used by the [commit] command.
** SQL function:
**
**       is_selected(id)
**       if_selected(id, X, Y)
** Return true if either:
**
** On the commit command, when filenames are specified (in order to do
** a partial commit) the vfile.id values for the named files are loaded
** into the g.aCommitFile[] array.  This function looks at that array
** to see if a file is named on the command-line.
**
** In the first form (1 argument) return TRUE if either no files are
**     a) Global.aCommitFile is NULL, or
**     b) Global.aCommitFile contains the integer passed as an argument.
** named on the command line (g.aCommitFile is NULL meaning that all
** changes are to be committed) or if id is found in g.aCommitFile[]
** (meaning that id was named on the command-line).
**
** In the second form (3 arguments) return argument X if true and Y
** Otherwise return false.
** if false.
*/
static void file_is_selected(
  sqlite3_context *context,
  int argc,
  sqlite3_value **argv
){
  int rc = 0;

  assert(argc==1);
  assert(argc==1 || argc==3);
  if( g.aCommitFile ){
    int iId = sqlite3_value_int(argv[0]);
    int ii;
    for(ii=0; g.aCommitFile[ii]; ii++){
      if( iId==g.aCommitFile[ii] ){
        sqlite3_result_int(context, 1);
        return;
        rc = 1;
        break;
      }
    }
  }else{
    rc = 1;
  }
  if( argc==1 ){
    sqlite3_result_int(context, 0);
    sqlite3_result_int(context, rc);
  }else{
    assert( argc==3 );
    assert( rc==0 || rc==1 );
    sqlite3_result_int(context, 1);
    sqlite3_result_value(context, argv[2-rc]);
  }
}

/*
** Convert the input string into an SHA1.  Make a notation in the
** CONCEALED table so that the hash can be undo using the db_reveal()
** function at some later time.

LOCAL void db_connection_init(void){
  sqlite3_exec(g.db, "PRAGMA foreign_keys=OFF;", 0, 0, 0);
  sqlite3_create_function(g.db, "user", 0, SQLITE_ANY, 0, db_sql_user, 0, 0);
  sqlite3_create_function(g.db, "cgi", 1, SQLITE_ANY, 0, db_sql_cgi, 0, 0);
  sqlite3_create_function(g.db, "cgi", 2, SQLITE_ANY, 0, db_sql_cgi, 0, 0);
  sqlite3_create_function(g.db, "print", -1, SQLITE_UTF8, 0,db_sql_print,0,0);
  sqlite3_create_function(
    g.db, "file_is_selected", 1, SQLITE_UTF8, 0, file_is_selected,0,0
    g.db, "is_selected", 1, SQLITE_UTF8, 0, file_is_selected,0,0
  );
  sqlite3_create_function(
    g.db, "if_selected", 3, SQLITE_UTF8, 0, file_is_selected,0,0
  );
  if( g.fSqlTrace ){
    sqlite3_trace(g.db, db_sql_trace, 0);
  }
}

/*