*** a/src/bin/scripts/vacuumdb.c
--- b/src/bin/scripts/vacuumdb.c
***************
*** 203,225 **** vacuum_one_database(const char *dbname, bool full, bool inplace, bool verbose,
  	PQExpBufferData sql;
  
  	PGconn	   *conn;
  
  	initPQExpBuffer(&sql);
  
  	appendPQExpBuffer(&sql, "VACUUM");
! 	if (inplace)
  	{
! 		appendPQExpBuffer(&sql, " (FULL INPLACE");
  		if (freeze)
! 			appendPQExpBuffer(&sql, ", FREEZE");
  		if (verbose)
! 			appendPQExpBuffer(&sql, ", VERBOSE");
  		if (analyze)
! 			appendPQExpBuffer(&sql, ", ANALYZE");
! 		appendPQExpBuffer(&sql, ")");
  	}
  	else
  	{
  		if (full)
  			appendPQExpBuffer(&sql, " FULL");
  		if (freeze)
--- 203,250 ----
  	PQExpBufferData sql;
  
  	PGconn	   *conn;
+ 	int			version;
+ 	bool		first_opt = true;
  
  	initPQExpBuffer(&sql);
  
+ 	conn = connectDatabase(dbname, host, port, username, prompt_password, progname);
+ 	version = PQserverVersion(conn);
+ 
  	appendPQExpBuffer(&sql, "VACUUM");
! 
! 	if (version >= 80500)
  	{
! 		if (full)
! 		{
! 			appendPQExpBuffer(&sql, "%sFULL%s", first_opt ? " (" : ", ",
! 							  inplace ? " INPLACE" : "");
! 			first_opt = false;
! 		}
  		if (freeze)
! 		{
! 			appendPQExpBuffer(&sql, "%sFREEZE", first_opt ? " (" : ", ");
! 			first_opt = false;
! 		}
  		if (verbose)
! 		{
! 			appendPQExpBuffer(&sql, "%sVERBOSE", first_opt ? " (" : ", ");
! 			first_opt = false;
! 		}
  		if (analyze)
! 		{
! 			appendPQExpBuffer(&sql, "%sANALYZE", first_opt ? " (" : ", ");
! 			first_opt = false;
! 		}
! 		if (!first_opt)
! 			appendPQExpBuffer(&sql, ")");
  	}
  	else
  	{
+ 		/*
+ 		 * On older servers, VACUUM FULL is equivalent to VACUUM (FULL
+ 		 * INPLACE) on newer servers, so we can ignore 'inplace'.
+ 		 */
  		if (full)
  			appendPQExpBuffer(&sql, " FULL");
  		if (freeze)
***************
*** 229,239 **** vacuum_one_database(const char *dbname, bool full, bool inplace, bool verbose,
  		if (analyze)
  			appendPQExpBuffer(&sql, " ANALYZE");
  	}
  	if (table)
  		appendPQExpBuffer(&sql, " %s", table);
  	appendPQExpBuffer(&sql, ";\n");
  
- 	conn = connectDatabase(dbname, host, port, username, prompt_password, progname);
  	if (!executeMaintenanceCommand(conn, sql.data, echo))
  	{
  		if (table)
--- 254,264 ----
  		if (analyze)
  			appendPQExpBuffer(&sql, " ANALYZE");
  	}
+ 
  	if (table)
  		appendPQExpBuffer(&sql, " %s", table);
  	appendPQExpBuffer(&sql, ";\n");
  
  	if (!executeMaintenanceCommand(conn, sql.data, echo))
  	{
  		if (table)